LAFARGE CORP
DEF 14A, 2000-03-30
CEMENT, HYDRAULIC
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<PAGE>   1
                                 SCHEDULE 14A
                                 (RULE 14a-101)

                    INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION
          PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES

                     EXCHANGE ACT OF 1934 (AMENDMENT NO.  )

     Filed by the Registrant [X]

     Filed by a Party other than the Registrant [ ]

     Check the appropriate box:

     [ ] Preliminary Proxy Statement        [ ] Confidential, for Use of the
                                                Commission Only (as permitted by
                                                Rule 14a-6(e)(2))

     [X] Definitive Proxy Statement

     [ ] Definitive Additional Materials

     [ ] Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12

                             LAFARGE CORPORATION

 -------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

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    (Name of Person(s) Filing Proxy Statement if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

     [X] No fee required.

     [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
         0-11.

     (1) Title of each class of securities to which transaction applies:

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     (2) Aggregate number of securities to which transaction applies:

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     (3) Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
         filing fee is calculated and state how it was determined):

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     (4) Proposed maximum aggregate value of transaction:

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     (5) Total fee paid:

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     [ ] Fee paid previously with preliminary materials.

     [ ] Check box if any part of the fee is offset as provided by Exchange
         Act Rule 0-11(a)(2) and identify the filing for which the offsetting
         fee was paid previously. Identify the previous filing by registration
         statement number, or the form or schedule and the date of its filing.

     (1) Amount previously paid:

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     (2) Form, schedule or registration statement no.:

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     (4) Date filed:

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<PAGE>   2

                           [LAFARGE CORPORATION LOGO]

                           11130 SUNRISE VALLEY DRIVE
                             RESTON, VIRGINIA 20191

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

                             TO BE HELD MAY 2, 2000

     The 2000 annual meeting of stockholders of Lafarge Corporation will be held
at The Ritz Carlton Hotel, 1700 Tysons Boulevard, McLean, Virginia, on Tuesday,
May 2, 2000, beginning at 9:00 a.m. local time. At the meeting, the holders of
the Company's Common Stock and the holders of the Exchangeable Preference Shares
of our subsidiary, Lafarge Canada, Inc. -- through an agreement with Montreal
Trust Company whereby it votes the Company's Voting Stock as instructed by
holders of Exchangeable Preference Shares -- will act on the following matters:

        (1) Election of directors for the ensuing year;

        (2) Ratification of the appointment of Arthur Andersen LLP as the
            Company's independent accountants for fiscal year 2000;

        (3) An amendment to our articles of incorporation increasing the number
            of authorized shares of Common Stock; and

        (4) Any other matters that properly come before the meeting.

     Holders of record of the Company's Common Stock and of the Exchangeable
Preference Shares of our subsidiary, Lafarge Canada, Inc., at the close of
business on March 6, 2000 are entitled to vote, or in the case of the
Exchangeable Preference Shares, to direct the vote of the Company's Voting
Stock, at the meeting or any postponements or adjournments of the meeting.

     Please submit your proxy, or in the case of the Exchangeable Preference
Shares your instructions to the Montreal Trust Company, as soon as possible so
that your shares can be voted at the meeting in accordance with your
instructions

March 28, 2000
                                          By Order of the Board of Directors,

                                            /s/ David C. Jones
                                               DAVID C. JONES
                                           Vice President--Legal
                                           Affairs and Secretary
<PAGE>   3

                               TABLE OF CONTENTS

<TABLE>
<S>                                                           <C>
ABOUT THE MEETING...........................................    1
  Why am I receiving these materials?.......................    1
  What information is contained in these materials?.........    1
  What proposals will be voted on at the meeting?...........    1
  What is Lafarge Corporation's voting recommendation?......    1
  What is the record date and how many shares were
     outstanding on the record date?........................    1
  What constitutes a quorum?................................    1
  What shares owned by me can be voted?.....................    2
  How do I vote?............................................    2
  Can I change my vote?.....................................    2
  What vote is required to approve each item?...............    2
  How will abstentions and broker non-votes affect the
     election of directors and approval of the matters to be
     considered at the meeting?.............................    3
  What does it mean if I receive more than one proxy or
     voting instruction card?...............................    3
  Where can I find the voting results of the meeting?.......    3
STOCK OWNERSHIP.............................................    4
  Who are the largest owners of the Company's stock?........    4
  How much stock do the Company's directors and executive
     officers own?..........................................    5
ITEM 1 -- ELECTION OF DIRECTORS.............................    7
  Who are the nominees standing for election as
     directors?.............................................    7
  How are directors compensated?............................    9
  What committees has the Board established?................   10
  Other Information.........................................   11
  Section 16(a) Beneficial Ownership Reporting Compliance...   11
EXECUTIVE COMPENSATION......................................   12
  Report on Executive Compensation..........................   12
  Compensation Committee Interlocks and Insider
     Participation..........................................   14
  Summary Compensation Table................................   15
  Option Exercises and Year-End Values......................   16
  Option Grants.............................................   16
  Performance Graph.........................................   17
  Retirement Plans..........................................   17
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS..............   19
  Indebtedness of Management................................   19
  Transactions with Management and Others...................   19
ITEM 2 -- RATIFICATION OF APPOINTMENT OF INDEPENDENT
  ACCOUNTANTS...............................................   20
ITEM 3 -- PROPOSED AMENDMENT TO THE ARTICLES OF
  INCORPORATION TO INCREASE AUTHORIZED COMMON STOCK.........   21
OTHER MATTERS...............................................   22
  Are other matters to be considered at the annual
     meeting?...............................................   22
  When must stockholder proposals for the 2001 annual
     meeting be submitted?..................................   22
  Who will bear the cost of soliciting proxies for the
     annual meeting?........................................   22
  How do I obtain a copy of the company's Form 10-K Annual
     Report?................................................   22
</TABLE>

                                        i
<PAGE>   4

                           [LAFARGE CORPORATION LOGO]

                           11130 SUNRISE VALLEY DRIVE
                             RESTON, VIRGINIA 20191

                                PROXY STATEMENT

     This proxy statement contains information relating to the annual meeting of
stockholders of Lafarge Corporation to be held at The Ritz Carlton Hotel, 1700
Tysons Boulevard, McLean, Virginia on Tuesday, May 2, 2000, beginning at 9:00
a.m. local time, and at any postponements or adjournments thereof.

                               ABOUT THE MEETING

WHY AM I RECEIVING THESE MATERIALS?

     The Board of Directors of Lafarge Corporation is providing these proxy
materials to you in connection with Lafarge Corporation's annual meeting of
stockholders scheduled for 9:00 a.m., May 2, 2000 at The Ritz Carlton Hotel,
1700 Tysons Boulevard, McLean, Virginia 22102 . You are invited to attend the
meeting and are requested to vote on the proposals described in this proxy
statement.

WHAT INFORMATION IS CONTAINED IN THESE MATERIALS?

     This proxy statement contains information relating to the proposals to be
voted on at the meeting, the voting process, the compensation of our directors
and our most highly paid officers, and certain other required information.

WHAT PROPOSALS WILL BE VOTED ON AT THE MEETING?

     There are three proposals scheduled to be voted on at the meeting:

        - election of directors for the ensuing year;

        - ratification of the appointment of Arthur Andersen LLP as the
          Company's independent accountants; and

        - an amendment to our Articles of Incorporation increasing the number of
          authorized shares of Common Stock.

WHAT IS LAFARGE CORPORATION'S VOTING RECOMMENDATION?

     Our Board of Directors recommends that you vote "FOR" all of the nominees
to the Board and "FOR" each of the other proposals.

WHAT IS THE RECORD DATE AND HOW MANY SHARES WERE OUTSTANDING ON THE RECORD DATE?

     The record date for the annual meeting is March 6, 2000. At the close of
business on the record date, there were 69,009,550 shares of Common Stock, par
value $1.00 per share, and 4,484,097 Exchangeable Preference Shares of our
subsidiary, Lafarge Canada, Inc., outstanding.

WHAT CONSTITUTES A QUORUM?

     The presence at the meeting in person or by proxy of the holders of a
majority of the combined total of the Company's Common Stock and the
Exchangeable Preference Shares of our subsidiary, Lafarge Canada, Inc., (through
instructions to the Montreal Trust Company as to how to vote the Company's
Voting Stock)
<PAGE>   5

outstanding on the record date will constitute a quorum. Broker non-votes and
shares represented by proxies received but marked as abstentions will be counted
as present for purposes of determining the quorum.

WHAT SHARES OWNED BY ME CAN BE VOTED?

     You may vote all of the Company's Common Stock and Exchangeable Preference
Shares of our subsidiary, Lafarge Canada, Inc., owned by you as of the record
date, March 6, 2000.

HOW DO I VOTE?

     Common Stock Held Directly by You.  If you complete and properly sign the
accompanying proxy card and return it to the Company, it will be voted as you
direct. You may also attend the meeting and deliver your proxy card in person or
otherwise vote in person at the meeting. Even if you plan to attend the annual
meeting, we recommend that you also submit your proxy so that your vote will be
counted if you later decide not to attend the meeting.

     Common Stock Held in a Broker's Account or by a Nominee (i.e., held in
"street name"). You may vote shares of Common Stock held by your broker or other
nominee by submitting voting instructions to your broker or nominee. Please
refer to the voting instruction card included by your broker or nominee for
specific instructions on how to submit your vote. You may not vote these shares
in person at the meeting.

     Exchangeable Preference Shares.  Holders of Exchangeable Preference Shares
are entitled to direct how the Company's Voting Stock is to be voted at the
annual meeting. We have deposited shares of our Voting Stock with the Montreal
Trust Company under an arrangement whereby the Montreal Trust Company is to vote
those shares as directed by holders of Exchangeable Preference Shares. Under
this arrangement, each holder of Exchangeable Preference Shares (other than
Lafarge Corporation and Lafarge Canada, Inc.) may instruct the Montreal Trust
Company how to vote one share of Voting Stock for each Exchangeable Preference
Share held. Please refer to the instruction card included by the Montreal Trust
Company for specific instructions on how to direct your vote. You may not vote
Exchangeable Preference Shares held on the record date in person at the meeting.

     Anyone acquiring Exchangeable Preference Shares after the close of business
on the record date, March 6, 2000, may instruct the Montreal Trust Company to
vote the underlying Voting Stock on his or her behalf even though he or she did
not hold the Exchangeable Preference Shares on the record date. To do so, he or
she must notify the Montreal Trust Company in writing no later than April 18,
2000 either (i) how it should vote the underlying Voting Stock or (ii) that the
holder of the Exchangeable Preference Shares will attend the annual meeting and
vote those shares in person. The Montreal Trust Company must also receive at its
offices in Montreal, Quebec no later than April 18, 2000 properly endorsed
certificates for those shares or other evidence satisfactory to the Montreal
Trust Company that ownership of the Exchangeable Preference Shares has
transferred.

CAN I CHANGE MY VOTE?

     Holders of Common Stock may change their vote at any time prior to the vote
at the annual meeting. To change your vote for shares held directly in your
name, you may either grant a new proxy or attend the annual meeting and vote in
person. If you attend the meeting but do not inform us that you wish to change
your vote, your proxy will be voted as previously directed. To change your vote
for shares you beneficially own, you must submit new voting instructions to your
broker or nominee. To change your vote for Exchangeable Preference Shares, you
must write to the Montreal Trust Company before it has acted upon your prior
instructions.

WHAT VOTE IS REQUIRED TO APPROVE EACH ITEM?

     Election of Directors.  The affirmative vote of a plurality of the votes
cast at the annual meeting is required for the election of directors.

                                        2
<PAGE>   6

     Ratification of Appointment of Independent Accountants.  The affirmative
vote of a majority of votes cast at the annual meeting with respect to the
ratification of the appointment of Arthur Andersen is required to ratify the
appointment of Arthur Andersen as independent accountants for the Company.

     Amendment of Articles of Incorporation to Increase Authorized Common
Stock.  The affirmative vote of a majority of shares entitled to vote with
respect to the amendment of the Articles of Incorporation to increase authorized
Common Stock (i.e., a majority of all Common Stock and Exchangeable Preference
Shares outstanding) is required to approve such amendment.

HOW WILL ABSTENTIONS AND BROKER NON-VOTES AFFECT THE ELECTION OF DIRECTORS AND
APPROVAL OF THE MATTERS TO BE CONSIDERED AT THE MEETING?

     Election of Directors.  Abstentions and broker non-votes will not be
counted as votes cast with respect to the election of directors and, therefore,
will have no effect on the result of the vote.

     Ratification of Appointment of Arthur Andersen.  Abstentions and broker
non-votes will not be counted as votes cast with respect to the ratification of
the appointment of Arthur Andersen and, therefore, will have no effect on the
result of the vote.

     Amendment of Articles of Incorporation to Increase Authorized Common
Stock.  Abstentions and broker non-votes will be counted as votes against the
proposed amendment of the Articles of Incorporation to increase authorized
Common Stock.

WHAT DOES IT MEAN IF I RECEIVE MORE THAN ONE PROXY OR VOTING INSTRUCTION CARD?

     If you receive more than one proxy card, your shares are registered under
different names or are in more than one account. Please provide voting
instructions for all proxy and voting instruction cards you receive.

WHERE CAN I FIND THE VOTING RESULTS OF THE MEETING?

     We will announce preliminary voting results at the meeting and publish
final results in our quarterly report on Form 10-Q for the second quarter of
fiscal 2000.

                                        3
<PAGE>   7

                                STOCK OWNERSHIP

WHO ARE THE LARGEST OWNERS OF THE COMPANY'S STOCK?

     The table below shows all stockholders known to the Company to beneficially
own (under the rules of the SEC) as of March 6, 2000 more than 5% of the
Company's Common Stock.

<TABLE>
<CAPTION>
                                                             AMOUNT AND NATURE
                                                               OF BENEFICIAL
           NAME AND ADDRESS OF BENEFICIAL OWNER                  OWNERSHIP       PERCENT OF CLASS(1)
           ------------------------------------              -----------------   -------------------
<S>                                                          <C>                 <C>
Lafarge S.A................................................    38,384,141(2)            52.2%
61, rue des Belles Feuilles
76116 Paris France
FMR Corp...................................................     4,523,525(3)             6.2%
82 Devonshire Street
Boston, Massachusetts 02109
UBS AG.....................................................     3,979,925(4)             5.4%
Bahnhofstrasse 45
8021, Zurich, Switzerland
</TABLE>

- ---------------
(1) Calculated based on the number of shares of Common Stock plus the number of
    Exchangeable Preference Shares outstanding. Holders of Exchangeable
    Preference Shares (other than the Company and Lafarge Canada, Inc.) have
    voting rights in the Company through a trust holding shares of the Company's
    Voting Stock.

(2) Includes 37,895,621 shares of Common Stock and 488,520 Exchangeable
    Preferences Shares of our subsidiary, Lafarge Canada, Inc., held by Lafarge
    S.A. either directly or through its beneficial interests in Lafarge (U.S.)
    Holdings and Paris-Zurich Holdings (both New York trusts) and Cementia
    Holdings A.G., a Swiss corporation and majority-owned subsidiary of Lafarge
    S.A.

(3) Based solely on the review of Schedule 13G dated February 14, 2000 filed by
    FMR Corp. with the U.S. Securities and Exchange Commission. The Schedule 13G
    reports beneficial ownership by FMR Corp. of 4,523,525 shares of Common
    Stock, with sole power to dispose or direct the disposition of all such
    shares and sole power to vote (or direct the vote of) 23,600 of such shares.
    The Schedule 13G also reports that the Fidelity Magellan Fund, an investment
    company registered under the Investment Company Act of 1940, has an interest
    in 4,481,150 shares of Common Stock reported as beneficially owned by FMR
    Corp.

(4) Based solely on the review of Schedule 13G dated February 4, 2000 filed by
    UBS AG with the U.S. Securities and Exchange Commission. The Schedule 13G
    reports beneficial ownership by UBS AG of 3,979,925 shares of Common Stock,
    primarily through its indirect wholly owned subsidiary Brinson Partners,
    Inc., a registered investment advisor. UBS AG disclaims beneficial ownership
    of such shares.

     The Company and its parent, Lafarge S.A., are parties to an Option
Agreement dated November 1, 1993. This agreement is intended to enable Lafarge
S.A. to maintain its existing margin of voting control. Through this agreement,
Lafarge S.A. has the right until October 31, 2003 to purchase voting securities
from the Company whenever the Company issues voting securities. This agreement
was approved by the Company's independent directors (i.e. those directors with
no affiliation with Lafarge S.A.) based upon the business advantages to the
Company which result from Lafarge S.A.'s majority ownership of the Company.
Lafarge S.A. is a public company whose voting securities are traded on various
European securities exchanges. Through its worldwide interests, Lafarge S.A. is
principally engaged in the manufacture and sale of cement, concrete, aggregate,
gypsum products, specialty materials and roofing. The Company understands that
Lafarge S.A. presently intends to maintain its position as majority owner of the
Company.

                                        4
<PAGE>   8

HOW MUCH STOCK DO THE COMPANY'S DIRECTORS AND EXECUTIVE OFFICERS OWN?

     The table below shows the number of shares of the Company's Common Stock
and the number of shares of the common stock of Lafarge S.A. (the Company's
"parent" as that term is defined in regulations promulgated under the Securities
Exchange Act of 1934, as amended) beneficially owned as of March 6, 2000 by (i)
the Company's directors, (ii) the executive officers of the Company named in the
Summary Compensation Table below and (iii) the directors and executive officers
of the Company as a group. Unless otherwise indicated, all shares are directly
owned.

<TABLE>
<CAPTION>
                                                       BENEFICIAL OWNERSHIP           BENEFICIAL OWNERSHIP
                                                         OF THE COMPANY'S               OF LAFARGE S.A.
                                                        COMMON STOCK(1)(2)              COMMON STOCK(2)
                                                     ------------------------       ------------------------
                                                      NUMBER         PERCENT         NUMBER         PERCENT
                       NAME                          OF SHARES       OF CLASS       OF SHARES       OF CLASS
                       ----                          ---------       --------       ---------       --------
<S>                                                  <C>             <C>            <C>             <C>
Thomas A. Buell....................................     11,500          *                   0
Marshall A. Cohen..................................     11,000(3)       *                   0
Bertrand P. Collomb................................    120,236          *              46,696(4)       *
Philippe P. Dauman.................................      4,000          *                   0
Bernard L. Kasriel.................................     17,000          *              79,210          *
Jacques Lefevre....................................      3,100          *              12,311          *
Paul W. MacAvoy....................................     12,000          *                   0
Claudine B. Malone.................................     10,250(5)       *                   0
Robert W. Murdoch..................................     12,100          *               1,536          *
Bertin F. Nadeau...................................     11,041(6)       *                   0
John D. Redfern....................................     20,730          *                 559          *
Joe M. Rodgers.....................................     11,500(7)       *                   0
Michel Rose........................................     70,250          *              28,500          *
Ronald D. Southern.................................     11,130(8)       *                   0
Gerald H. Taylor...................................          0                              0
John M. Piecuch....................................    136,470          *               7,595          *
Michael J. Balchunas...............................     42,522          *                   0
Edward T. Balfe....................................    113,883          *                   0
Peter H. Cooke.....................................     54,455          *                   0
Larry J. Waisanen..................................     36,665          *               2,584          *
All directors and executive officers of the Company
  as a group (29 persons)..........................    857,986          *             179,868          *
</TABLE>

- ---------------
 *  Less than 1%

(1) Includes (a) Exchangeable Preference Shares of our subsidiary, Lafarge
    Canada, Inc., which are exchangeable at the option of the holder into Common
    Stock on a one for one basis and (b) Common Stock and Exchangeable
    Preference Shares covered by stock options that were exercisable on March 6,
    2000 or within 60 days thereafter (referred to below as "currently
    exercisable options"). Holders of Exchangeable Preference Shares have voting
    rights in the Company through a trust holding shares of the Company's Voting
    Stock and are entitled to direct the voting of one share of Voting Stock for
    each Exchangeable Preference Share held.

                                        5
<PAGE>   9

(2) The number of shares reported for each of the individuals listed below
    includes the following number of shares which are not outstanding but are
    subject to currently exercisable options:

<TABLE>
<CAPTION>
                             COMPANY   LAFARGE S.A.                                COMPANY   LAFARGE S.A.
                             COMMON       COMMON                                   COMMON       COMMON
             NAME             STOCK       STOCK                  NAME               STOCK       STOCK
             ----            -------   ------------              ----              -------   ------------
    <S>                      <C>       <C>            <C>                          <C>       <C>
    Thomas A. Buell........   10,000                  John D. Redfern...........    10,000
    Marshall A. Cohen......   10,000                  Joe M. Rodgers............    10,000
    Bertrand P. Collomb....  112,500      22,222      Michel Rose...............    70,250      28,182
    Philippe P. Dauman.....    4,000                  Ronald D. Southern........    10,000
    Bernard L. Kasriel.....   15,000      77,400      John M. Piecuch...........   128,750       7,468
    Jacques Lefevre........    3,000      11,111      Michael J. Balchunas......    40,500
    Paul W. MacAvoy........   10,000                  Edward T. Balfe...........   109,375
    Claudine B. Malone.....   10,000                  Peter H. Cooke............    52,750
    Robert W. Murdoch......   10,000                  Larry J. Waisanen.........    33,750       2,467
    Bertin F. Nadeau.......   10,000                  Total Directors &
                                                      Officers..................   806,375     148,960
</TABLE>

- ---------------
(3) Includes 1,000 shares owned by Adroit Investments Ltd., which is controlled
    by Mr. Cohen.

(4) Includes 22,775 shares held by a family partnership over which Mr. Collomb
    has voting power.

(5) Includes 250 shares owned by Financial & Management Consulting, Inc. which
    is controlled by Ms. Malone.

(6) Includes 1,023 shares owned by La Financiere Nadeau Ltd. which is controlled
    by Mr. Nadeau.

(7) Includes 1,500 shares owned by JMR Investments which is controlled by Mr.
    Rodgers and his wife.

(8) Includes 1,130 shares held by Sentgraf Enterprises Ltd., which is controlled
    by Mr. Southern.

                                        6
<PAGE>   10

                        ITEM 1 -- ELECTION OF DIRECTORS

WHO ARE THE NOMINEES STANDING FOR ELECTION AS DIRECTORS?

     Each of the nominees below has consented to serve as a director if elected.
All are currently directors of the Company. All proxies received, unless
revoked, will be voted for each of the nominees listed below, unless
authorization to so vote is withheld. Cumulative voting is not permitted. If a
nominee should become unavailable to stand for election for any reason, the
persons designated as proxies will have full discretion to cast their votes for
any other person designated by the Board. Below you will find certain background
information regarding each of the nominees.

     THOMAS A. BUELL, Director/Consultant of Weldwood of Canada Limited
(diversified manufacturer of paper products). Mr. Buell has served in such
capacity since May 1996. Mr. Buell, age 68, was Chairman of the Board of
Weldwood of Canada Limited from January 1979 to April 1996 and President and
Chief Executive Officer of such company from August 1975 to December 1992. He is
also a director of Placer Dome Inc., B.C. Gas, Inc., Trans Mountain Pipe Line
Company Ltd. and TimberWest Forest Limited. He has served as a director of the
Company since January 1, 1993.

     MARSHALL A. COHEN, Counsel, Cassels, Brock & Blackwell, Barristers and
Solicitors. Mr. Cohen, age 64, has served in such capacity since October 1996.
From November 1988 to September 1996, he was President and Chief Executive
Officer and a director of The Molson Companies Limited. He is also a director of
Barrick Gold Corporation, American International Group, Inc. and Clark USA. He
has served as a director of the Company since 1991.

     BERTRAND P. COLLOMB, Chairman of the Board of the Company and Chairman of
the Board and Chief Executive Officer of Lafarge S.A. Mr. Collomb, age 57, has
served as Chairman of the Board of the Company since January 1989 and as
Chairman of the Board and Chief Executive Officer of Lafarge S.A. since August
1, 1989. He served as Vice Chairman of the Board and Chief Operating Officer of
Lafarge S.A. from January 1989 to August 1, 1989. He was Vice Chairman of the
Board and Chief Executive Officer of the Company and Senior Executive Vice
President of Lafarge S.A. from 1987 until January 1989. He has served as a
director of the Company since 1985.

     PHILIPPE P. DAUMAN, Deputy Chairman and Executive Vice President of Viacom,
Inc. (entertainment). Mr. Dauman, age 46, has served as Deputy Chairman since
January 1996 and as Executive Vice President since March 1994. He has served as
Chief Administrative Officer of such company since March 1994 and also held the
title of General Counsel from January 1993 to October 1998. Previously Mr.
Dauman was a partner of the law firm Shearman & Sterling. He is also a director
of Viacom's parent company, National Amusements, Inc. as well as Blockbuster,
Inc. He has served as a director of the Company since 1997.

     BERNARD L. KASRIEL, Vice Chairman of the Board of the Company and Vice
Chairman and Chief Operating Officer of Lafarge S.A. Mr. Kasriel, age 53, was
elected to his current position in May 1996. He has served as Vice Chairman and
Chief Operating Officer of Lafarge S.A. since January 1, 1995. Prior to that he
served as Managing Director of Lafarge S.A. from 1989 to 1994, Senior Executive
Vice President of Lafarge S.A. from 1987 to 1989 and Executive Vice President of
Lafarge S.A. from 1982 until March 1987. Mr. Kasriel is also a director of
Sonoco Products Company. He has served as a director of the Company since 1989.

     JACQUES LEFEVRE, Vice Chairman and Chief Operating Officer of Lafarge S.A.
Mr. Lefevre, age 61, has served as Vice Chairman and Chief Operating Officer of
Lafarge S.A. since January 1, 1995. From August 1, 1989 to 1994, he served as
Managing Director of Lafarge S.A. He served as Senior Executive Vice President
of Lafarge S.A. from 1987 to August 1, 1989 and as Executive Vice President of
Lafarge S.A. from 1983 to 1987. He has served as a director of the Company since
1983.

     PAUL W. MACAVOY, Williams Brothers Professor of Management Studies, Yale
School of Management. Mr. MacAvoy, age 65, has been Williams Brothers Professor
since 1992. He served as Dean of the Yale School of Management from 1992 to
1994, as McLaughlin Visiting Professor of Business Administration,
                                        7
<PAGE>   11

Amos Tuck School, Dartmouth College in 1991, as Lester Crown Visiting Professor,
Yale School of Management from 1990 to 1991 and as Dean and John M. Olin
Professor of Public Policy, W.E. Simon Graduate School of Business
Administration, University of Rochester from 1983 to 1991. He has served as a
director of the Company since 1993.

     CLAUDINE B. MALONE, President of Financial & Management Consulting, Inc.
Ms. Malone, age 63, has served in such capacity since 1982. Ms. Malone is also a
director of Dell Computer Corp., Hannaford Bros. Co., Hasbro, Inc., Houghton
Mifflin Company, The Limited Inc., Lowe's Companies, Mallinckrodt Inc., SAIC
Corp. and Union Pacific Resources Corporation. She has served as a director of
the Company since May 1994.

     ROBERT W. MURDOCH, Corporate Director. Mr. Murdoch, age 58, was formerly
President and Chief Executive Officer of the Company from January 1989 to August
1992, President and Chief Executive Officer of Lafarge Canada, Inc. from 1985 to
1992, Senior Executive Vice President of Lafarge S.A. from August 1989 to
September 1992 and President and Chief Operating Officer of the Company from
1987 to 1989. Mr. Murdoch is also a director of Lafarge S.A., Lafarge Canada,
Inc., Usinor S.A., Sierra Systems Group Inc., Lallmano, Inc. and Power
Corporation International Limited. He has served as a director of the Company
since 1987.

     BERTIN F. NADEAU, Chairman of the Board and Chief Executive Officer of
GescoLynx Inc. (a private holding company). Mr. Nadeau has served in such
capacity since September 30, 1994. He was also Chairman of the Board, President
and Chief Executive Officer of Unigesco Inc. from 1982 to September 1994 and
Chairman of the Board of Unigesco's affiliate, Univa Inc. (a marketer and
distributor in the food sector) from October 1989 to July 1993. Mr. Nadeau, age
59, is also a director of Sun Life Assurance Company of Canada. He has served as
a director of the Company since 1988.

     JOHN M. PIECUCH, President and Chief Executive Officer of the Company and
Group Executive Vice President of Lafarge S.A. Mr. Piecuch, age 51, has served
as President and Chief Executive Officer of the Company since October 1, 1996
and as Group Executive Vice President of Lafarge S.A. since July 1, 1994. He
served as Senior Executive Vice President of the Company from 1992 to June 30,
1994 and as Executive Vice President of the Company from 1989 to 1992. He has
served as a director of the Company since August 1, 1994.

     JOHN D. REDFERN, Chairman of the Board of Lafarge Canada, Inc. Mr. Redfern
has served as Chairman of the Board of Lafarge Canada, Inc. since 1984. Mr.
Redfern served as Vice Chairman of the Board of the Company from January 1989 to
May 1996, as Chairman of the Board of the Company from 1985 until January 1989,
as President and Chief Executive Officer of the Company from 1983 until 1985 and
as Chief Executive Officer of Lafarge Canada, Inc. from 1977 to 1985. Mr.
Redfern, age 64, is also a director of Lafarge Canada, Inc. He has served as a
director of the Company since 1983.

     JOE M. RODGERS, Chairman, The JMR Group (investment company). Mr. Rodgers,
age 66, served as the United States Ambassador to France from 1985 until 1989.
He is also a director of AMR Corporation/ American Airlines, Inc., Gaylord
Entertainment Company, SunTrust Bank, Nashville, N.A., Thomas Nelson, Inc.,
Towne Services, Inc., and Tractor Supply Company. He has served as a director of
the Company since 1989.

     MICHEL ROSE, Group Senior Executive Vice President of Lafarge S.A. Mr. Rose
has served as Senior Executive Vice President of Lafarge S.A. since 1989. Mr.
Rose, age 57, served as President and Chief Executive Officer of the Company
from September 1, 1992 until September 30, 1996. He served as Chairman and Chief
Executive Officer of Orsan S.A., a subsidiary of Lafarge S.A., from 1987 to
1992. He has served as a director of the Company since 1992.

     RONALD D. SOUTHERN, Chairman of the Board and Chief Executive Officer of
ATCO Ltd. (a diversified industrial company) and Chairman of the Board and Chief
Executive Officer of Canadian Utilities Limited (a utility company). Mr.
Southern has served ATCO Ltd. as Chairman of the Board since May 1990 and as CEO
since 1968. He was also President of such company from June 1988 until the end
of 1993. He has been Chairman of the Board of Canadian Utilities Limited since
1981 and he became Chief Executive Officer
                                        8
<PAGE>   12

of such company in January 1994. Mr. Southern, age 69, is also a director of
Canadian Pacific Limited, Fletcher Challenge Canada Limited, Royal & Sun
Alliance Insurance Company of Canada, Chrysler Canada Ltd. and Southam Inc. He
has served as a director of the Company since 1985.

     GERALD H. TAYLOR , Telecommunications Consultant and Private Investor. Mr.
Taylor, age 58, served as Chief Executive Officer of MCI from November 1996 to
October 1998. He also served as MCI's President and Chief Operating Officer from
July 1994 to November 1996 and as MCI's Chief Operating Officer from April 1993
to July 1994. Mr. Taylor is also a director of CIENA, E2Enet, Inc. and
Voyager.net. Mr. Taylor was elected to the Board in October 1999.

     There is no family relationship between any of the nominees or between any
of the nominees and any executive officer of the Company or any of its
subsidiaries.

HOW ARE DIRECTORS COMPENSATED?

     Base Compensation.  Directors who are also employees of the Company receive
no additional compensation for service as directors. Each non-employee director
receives an annual fee of $34,000 for service as a director, plus $1,000 for
each Board meeting attended. Each non-employee director also receives an annual
fee of $3,000 for each committee on which he or she serves, plus an additional
$3,000 annually for each committee of which he or she serves as chair. All fees
are paid quarterly. All directors are reimbursed for travel, lodging and other
expenses they incur related to attending Board and committee meetings.

     Each year, directors may elect to defer payment of their fees for that year
until termination of their service as a director. Any such election must be made
prior to that year's annual stockholder meeting and must specify one of two
payment options--lump sum or up to ten annual installments. Deferred fees bear
interest computed quarterly at the average prime rate for the quarter.

     A non-employee director who is 70 years of age or older (or, with the
approval of the Board Governance Committee, between the ages of 65 and 69) and
who has seven or more years of credited service as a director is entitled to
receive upon retirement from the Board of Directors $20,000 annually for the
remainder of his or her life, and his or her surviving spouse is entitled to
receive $10,000 annually for the remainder of his or her life following such
director's death. A non-employee director retiring at age 55 through 69 who has
three or more years of credited service is entitled to receive, upon retirement,
$20,000 annually for a period of time equal to his or her period of credited
service as a director and his or her surviving spouse is entitled to receive
$10,000 annually for the balance of such period if the director dies before the
end of such period.

     Two non-employee directors of the Company (Mr. Redfern and Mr. Murdoch)
also serve as directors of the Company's subsidiary, Lafarge Canada, Inc. Each
receives from Lafarge Canada, Inc. an annual fee of Cdn. $14,000 for service as
a director plus Cdn. $1,000 for each board or committee meeting attended. All
fees are paid semi-annually, in addition, each is reimbursed by Lafarge Canada,
Inc. for travel, lodging and other expenses he incurs related to attending
Lafarge Canada, Inc. board and committee meetings.

     Options.  Each non-employee director receives during February of each year
an automatic grant of an option to purchase 1,000 shares of common stock. For
fiscal 1999, Thomas A. Buell, Marshall A. Cohen, Philippe P. Dauman, Jacques
Lefevre, Paul W. MacAvoy, Claudine B. Malone, Robert W. Murdoch, Bertin F.
Nadeau, John D. Redfern, Joe M. Rodgers, Michel Rose and Ronald D. Southern
received grants under this plan. Each option grant permits the recipient to
purchase shares at their fair market value on the date of grant, which was
$38.125 in the case of options granted in 1999.

     Gerald H. Taylor automatically received a one-time grant of an option to
purchase 5,000 shares of common stock upon his election to the Company's Board
of Directors in 1999. This option permits Mr. Taylor to purchase shares at
$28.0625, their fair market value on the date of grant.

     Options granted to non-employee directors vest depending upon the
director's length of service at the time of grant. Options granted to directors
who have served continuously for at least four years as of the date of grant are
fully vested. Options granted to directors who have served continuously less
than four years as of

                                        9
<PAGE>   13

the date of grant vest 25% on such date for each year of the director's prior
continuous service through the date of grant and vest 25% on each subsequent
anniversary of a director's joining the Board.

WHAT COMMITTEES HAS THE BOARD ESTABLISHED?

     The Board of Directors has standing Executive, Finance, Board Governance,
Management Development and Compensation, Audit, Stock Option, Pension, and
Strategy and Development Committees.

                          BOARD COMMITTEE MEMBERSHIPS

<TABLE>
<CAPTION>
                                                                          MANAGEMENT
                                                               BOARD     DEVELOPMENT &         STOCK            STRATEGY AND
                 NAME                    EXECUTIVE  FINANCE  GOVERNANCE  COMPENSATION   AUDIT  OPTION  PENSION  DEVELOPMENT
                 ----                    ---------  -------  ----------  -------------  -----  ------  -------  ------------
<S>                                      <C>        <C>      <C>         <C>            <C>    <C>     <C>      <C>
Thomas A. Buell                                                  *             #          *      #
Marshall A. Cohen                                      *                                  #                          *
Bertrand P. Collomb                          *                   *                                                   *
Philippe P. Dauman                                                             *          *      *        *
Bernard L. Kasriel                           #                                                                       *
Jacques Lefevre                                        #
Paul W. MacAvoy                                                  *                                        *          *
Claudine B. Malone                                               *             *                 *        #
Robert W. Murdoch                                                                                         *          *
Bertin F. Nadeau                                       *                                  *               *
John M. Piecuch                              *         *                                                             #
John D. Redfern                              *                   #             *
Joe M. Rodgers                                         *                                  *               *
Michel Rose                                                                                                          *
Ronald D. Southern                                                             *                 *                   *
Gerald H. Taylor                                                               *          *      *
</TABLE>

- ---------------
* Member

# Chairman

     Executive Committee.  The Executive Committee has the authority and power
of the Board of Directors in the management of the business and affairs of the
Company when the Board of Directors is not in session, except as otherwise
provided by law. In practice, however, the Committee generally acts only with
respect to matters delegated to it by the entire Board of Directors. The
Executive Committee did not meet during fiscal 1999, but took action by
unanimous written consent one time during the year.

     Finance Committee.  The Finance Committee makes recommendations to the
Board of Directors as to various matters involving the financial affairs of the
Company. The Finance Committee met four times during fiscal 1999.

     Board Governance Committee.  The Board Governance Committee identifies and
presents qualified persons for election and re-election as directors of the
Company. This Committee annually reviews Board and Board committee performance,
as well as the effectiveness of the Company's governance structure and matters
related to corporate governance. The Committee also advises and makes
recommendations concerning criteria for Board membership, the number of members
of the Board of Directors and the composition and Committee structure of the
Board of Directors. The Board Governance Committee met two times during fiscal
1999.

     Management Development and Compensation Committee.  The Management
Development and Compensation Committee reviews the Company's executive
management and Board compensation standards and practices, and recommends
revisions and changes in compensation arrangements. The Committee also reviews
executive resources, the performance of key executives as well as organization
and succession plans. The Committee approves compensation changes for all senior
executives and it makes recommendations to the Board as to who should serve as
officers of the Company. The Management Development and Compensation Committee
met three times during fiscal 1999.

                                       10
<PAGE>   14

     Audit Committee.  This Committee recommends the appointment of independent
accountants, reviews all recommendations made to the Board of Directors by the
independent public accountants on accounting methods and internal control
systems and advises the Board of Directors with respect thereto, and reviews the
Company's internal audit process as well as transactions between the Company and
related parties. The Audit Committee met three times during fiscal 1999.

     Stock Option Committee.  The Stock Option Committee administers the
Company's stock option plans and has sole authority to grant options under the
Company's stock option plans. The Stock Option Committee met one time during
fiscal 1999.

     Pension Committee.  The Pension Committee administers the Company's various
pension plans, regularly reviewing the funding status of the plans and
performance of the managers of the assets of the plans, making changes in such
managers when it deems it appropriate. The Pension Committee met two times
during fiscal 1999.

     Strategy and Development Committee.  The Strategy and Development Committee
is responsible for reviewing the short-range and long-term strategic plans of
the Company. This Committee also considers various strategic issues, major
acquisitions and dispositions of assets and advises the Board of Directors with
respect thereto. The Strategy and Development Committee met two times during
fiscal 1999, once with the participation of the full Board.

OTHER INFORMATION

     The Board of Directors held four meetings in 1999. Each Board Committee
held such number of meetings as indicated in such Committee's description above.
During 1999, only Mr. Rodgers attended fewer than 75% of the aggregate of the
number of Board meetings and the meetings of the Committees on which he served.

     On March 18, 1998, a stockholder derivative lawsuit was filed against the
Company's directors in the Circuit Court for Montgomery County, Maryland. The
lawsuit alleged breach of fiduciary duty, corporate waste, and gross negligence
in connection with the Company's purchase of North American construction
materials assets from Lafarge S.A., the Company's majority stockholder (the
"Redland Transaction").

     The Redland Transaction, proposed to the Company in late 1997, was
evaluated by a special committee of independent directors after conducting
extensive due diligence and being advised by independent professionals retained
by the committee to assist with its evaluation, one of which, an investment
banking firm, advised the committee regarding the fairness of the price and
terms of the Redland Transaction. Based on its due diligence and the opinions of
its specially-retained advisers, the special committee recommended the Redland
Transaction for approval by the full Board of Directors of the Company. On March
16, 1998, the full Board, consisting of a majority of independent directors,
approved the Redland Transaction, which was publicly announced on March 17,
1998.

     The directors advised the Company that the lawsuit was without merit and
have vigorously defended against the lawsuit. By order dated January 28, 2000,
the Court granted the directors' motion for summary judgment. The Company has
been advised that the plaintiffs have appealed the Court's ruling and that the
directors intend to vigorously contest that appeal.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
executive officers, directors and holders of more than 10% of our Common Stock
to file with the Securities and Exchange Commission reports regarding their
ownership and changes in ownership of our stock. Based upon a review of these
filings and written representations from the Company's directors and executive
officers, the Company notes that Gerald H. Taylor, a director of the Company,
inadvertently failed to report an option to acquire 5,000 shares of the
Company's Common Stock within his initial report of ownership. Mr. Taylor
subsequently reported that option.

                                       11
<PAGE>   15

                             EXECUTIVE COMPENSATION

     The Company's executive compensation program is administered by the
Management Development and Compensation Committee of the Board of Directors and,
with respect to stock-based compensation, the Stock Option Committee of the
Board of Directors. No member of either committee is an employee of the Company.
All decisions made by the Compensation Committee relating to the compensation of
the Company's executive officers are presented to, and are available for review
by, the full Board. All decisions relating to stock options are made solely by
the Stock Option Committee.

REPORT ON EXECUTIVE COMPENSATION

     The following is a report submitted by members of the Management
Development and Compensation Committee and the Stock Option Committee,
addressing the Company's compensation policy as it related to the Company's
executive officers for fiscal 1999:

     The goal of the Company's executive compensation policy is to ensure that
an appropriate relationship exists between executive pay and the creation of
stockholder value, while at the same time motivating and retaining key
employees. To achieve this goal, the Company's executive compensation policies
integrate competitive levels of annual base compensation with bonuses based upon
corporate performance and individual initiatives and performance. This annual
cash compensation, together with the payment of equity-based, incentive
compensation, is designed to attract and retain qualified executives and to
ensure that such executives have a continuing stake in the long-term success of
the Company. All executive officers and certain key managers participate in the
Company's incentive compensation plans.

     In 1999, the Company's executive compensation program consisted primarily
of (i) base salary adjusted from the prior year, (ii) a bonus opportunity, based
upon the performance measurements described below, and (iii) options granted
under the Company's 1998 Stock Option Plan.

     Base Salary.  In establishing base salaries for executive officers of the
Company, the Company participates in executive compensation surveys with other
construction materials and cement companies in the United States and Canada,
reviews market data of general industry companies of similar size, and utilizes
information provided by several independent compensation consultants. The
comparison group utilized by the Company for cash compensation matters generally
includes industrial companies with annual sales in excess of $1 billion, which
employ more than 1,000 full time employees, with a unionized labor force, and
which have been profitable over the most recent two to three year period.
Individual performance among the companies included in the comparison group is
not separately evaluated.

     The Company annually sets base salary targets, or midpoints, for each of
its executives, including the President and Chief Executive Officer, at levels
within the range of those persons holding comparably responsible positions at
other companies in the Company's comparison group. Such midpoints are
established based upon a point system designed to assign a value for each
executive office, taking into account the various responsibilities and duties of
the specific position. Due to the Company's long-term approach to compensation
and the cyclical nature of the Company's business, historically a greater
percentage of the annual compensation (base salary plus bonus) paid to executive
officers has been represented by the salary component. Consequently, the Company
has paid slightly higher base salaries and lower annual bonuses than other
companies in its comparison group. However, the annual cash compensation targets
for the Company's executive officers have generally been set between the median
and the 3rd quartile of the range for annual cash compensation totals in the
comparison group.

     Salaries for executive officers are reviewed by the Board's Management
Development and Compensation Committee (the "Compensation Committee") in the
first quarter of each year and may be increased at that time on the basis of the
individual performance of the executive, as evaluated by senior management, the
Company's expected financial performance, and changes in competitive pay levels.
An annual overall budget of salary increases for the year is prepared, based
upon the Company's expected financial performance and taking into consideration
the expected pay increases, if any, indicated by the various industry surveys
and information from various compensation consultants. The Compensation
Committee then utilizes this budget

                                       12
<PAGE>   16

in establishing salaries based upon management's evaluation of each officer's
performance during the prior year. In 1999, in view of the Company's long-term
compensation objectives and improvements in the Company's financial results, the
budgeted salary increases were comparable to projected salary increases for the
comparison group utilized by the Company.

     The base salary of $442,000 for the President and Chief Executive Officer
was established in accordance with the policies established for all executive
officers and was slightly above the midpoint of the range for persons holding
comparable positions at other companies in the comparison group. The Chairman of
the Board annually reviews the Chief Executive Officer's performance and makes a
salary recommendation which is acted upon by the Compensation Committee. The
1999 salaries of the other executive officers of the Company listed in the
Summary Compensation Table (the "named executive officers") ranged from
approximately 98% to 114% of the midpoints established with respect to each of
such positions.

     Annual Incentives.  The Company has an annual bonus plan that provides for
the payment of bonuses to certain executive officers and key managers contingent
upon the achievement of certain financial targets and/or individual objectives.
The bonus plan is intended to reward the accomplishment of corporate objectives,
reflect the Company's priority on maximizing earnings, and provide a fully
competitive compensation package which will attract, reward and retain quality
individuals. Under the plan, one-half of the total bonus opportunity for a
participant is based upon the attainment of financially based Company
performance objectives and one-half of the total bonus opportunity is based upon
the achievement of individual objectives. If both the Company and individual
performance objectives are attained or surpassed, participants will be eligible
to receive maximum amounts ranging from 40% to 100% of their base salary,
depending upon their position with the Company.

     Financially based performance objectives measure the Company's performance
for the year against certain return on equity and return on net asset criteria.
Subjective performance criteria are used to evaluate each officer's individual
performance with respect to the individual objectives defined for such officer
at the beginning of each year. Individual objectives may include the performance
of a specific division or product line for which an officer is responsible, the
reduction of Company or division expenses or debt, or other specific tasks or
goals, and typically include a series of non-quantifiable objectives.

     Annual incentives are paid only upon the achievement of either financial
performance objectives or individual performance objectives for the year.
Because of the Company's improved earnings performance, financial performance
bonuses were paid with respect to 1999 in amounts in the range of 32.5% to 50%
of the salaries of the Chief Executive Officer and the named executive officers.
The individual performance bonuses paid to these persons with respect to 1999
were in the range of 30% to 46% of such salaries.

     Mr. Piecuch's total bonus amount was equal to approximately 96% of his 1999
salary. The Company performance objective on which a portion of such bonus was
based was the achievement by the Company of return on equity and return on net
assets targets specified by the Compensation Committee. The factors considered
by the Compensation Committee in determining the portion of the bonus based on
individual objectives included his leadership role with respect to the Company's
improved financial performance in 1999.

     Long-Term Incentives.  Long-term incentive awards strengthen the ability of
the Company to attract, motivate and retain executives of superior capability
and more closely align the interests of management with those of stockholders.
Long-term awards granted in 1999 consisted of non-qualified stock options
granted under the Company's 1998 Stock Option Plan. Unlike cash, the value of a
stock option will not be immediately realized and does not result in a current
expense to the Company. Stock options are granted with exercise prices equal to
the prevailing market value of the Common Stock and will have value only if the
Company's stock price increases, resulting in a commensurate benefit for the
Company's stockholders. Generally, grants may vest in equal amounts over four
years. Executives generally must be employed by the Company or an affiliate of
the Company at the time of vesting.

     The Board's Stock Option Committee (the "Stock Option Committee") considers
on an annual basis the grant of options to executive officers and key managers.
The number of options granted is generally based upon the position held by a
participant and the Stock Option Committee's subjective evaluation of such

                                       13
<PAGE>   17

participant's contribution to the Company's future growth and profitability. In
accordance with the policy maintained by the Stock Option Committee, the total
number of options granted annually under the Company's stock option program
represents approximately 1% of the approximately 73,000,000 outstanding shares
of Common Stock of the Company (including the Exchangeable Preference Shares of
our subsidiary, Lafarge Canada, Inc.). Generally, the grant of options is an
annual determination, but the Stock Option Committee may consider the size of
past awards and the total amounts outstanding in making such a determination. In
1999, the Stock Option Committee granted to Mr. Piecuch options to purchase
40,000 shares of the Company's Common Stock based upon the foregoing factors.

     Lafarge S.A., the Company's principal stockholder, has advised the Company
that it intends to grant to certain executive officers of the Company options to
purchase shares of Lafarge S.A. common stock from time to time, in recognition
of their contributions to the overall performance of Lafarge S.A. and its
affiliated companies. Options granted by Lafarge S.A. are not considered by the
Stock Option Committee in determining the number of options to be granted by the
Company.

     The Compensation Committee and the Stock Option Committee believe that
linking executive compensation to corporate performance results in a better
alignment of compensation with corporate goals and stockholder interests. As
performance goals are met or exceeded, resulting in increased value to
stockholders, executives are rewarded commensurately. The Committees believe
that compensation levels during 1999 adequately reflect the Company's
compensation goals and policies.

March 1, 2000

<TABLE>
<CAPTION>
   Management Development and Compensation
                  Committee                               Stock Option Committee
<S>                                            <C>
Thomas A. Buell, Chairman                      Thomas A. Buell, Chairman
Philippe P. Dauman                             Philippe P. Dauman
Claudine B. Malone                             Claudine B. Malone
John D. Redfern                                Ronald D. Southern
Ronald D. Southern                             Gerald H. Taylor
Gerald H. Taylor
</TABLE>

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     Of the directors who constitute the Management Development and Compensation
Committee and the Stock Option Committee, only John D. Redfern has been an
officer of the Company or of our subsidiary, Lafarge Canada, Inc.. Mr. Redfern's
current and previous positions with the Company and Lafarge Canada, Inc. are
described under "Item 1 -- Election of Directors."

                                       14
<PAGE>   18

SUMMARY COMPENSATION TABLE

     The following table sets forth information with respect to our Chief
Executive Officer and the other four most highly compensated executive officers
of the Company for the year ended December 31, 1999 who were serving as
executive officers at year end.

<TABLE>
<CAPTION>
                                                                                    LONG-TERM
                                                                                   COMPENSATION
                                                                                      AWARDS
                                                                                   ------------
                                                                                    SECURITIES
                                                ANNUAL COMPENSATION                 UNDERLYING
                                    --------------------------------------------      STOCK
             NAME AND                                             OTHER ANNUAL       OPTIONS         ALL OTHER
        PRINCIPAL POSITION          YEAR    SALARY     BONUS     COMPENSATION(1)       (#)        COMPENSATION(2)
        ------------------          ----   --------   --------   ---------------   ------------   ---------------
<S>                                 <C>    <C>        <C>        <C>               <C>            <C>
John M. Piecuch(3)................  1999   $442,000   $425,000                        40,000          $26,168
  President and Chief               1998    416,500    315,775                        35,000           24,148
  Executive Officer of Lafarge      1997    382,500    230,648                        35,000           24,316
  Corp.; President and Chief
  Executive Officer of Lafarge
  Canada, Inc.
Michael J. Balchunas..............  1999    210,000    156,250                        12,000           58,758
  Senior Vice President             1998    190,000     85,500                        12,000            8,607
  and President, U.S.               1997    177,650     78,100                        10,000            8,465
  Cement Operations
Edward T. Balfe...................  1999    375,000    300,000                        27,500           30,534
  Executive Vice President and      1998    323,000    210,000                        25,000           27,000
  President, Construction           1997    264,000    149,200     $28,483(4)         20,000           27,359
  Materials
Peter H. Cooke....................  1999    241,666    228,750                        21,000           71,637
  Executive Vice President --       1998    195,489    106,508                        20,000            4,360
  Cement Operations                 1997    190,661     99,230                        20,000            5,468
Larry J. Waisanen.................  1999    255,000    193,800                        22,500           19,719
  Executive Vice President          1998    230,000    133,800                        17,500           19,720
  and Chief Financial               1997    195,000     86,200                        12,500           19,678
  Officer
</TABLE>

- ---------------
(1) Excludes perquisites and other benefits, unless the aggregate amount of such
    benefits exceeded the lesser of $50,000 or 10 percent of the total annual
    salary and bonus reported for the named executive officer.

(2) The amounts shown for 1999 include (a) contributions or allocations by the
    Company to the executives' accounts under the Company's Thrift Savings Plan
    and Thrift Savings Restoration Plan ($12,790 for Mr. Piecuch, $7,200 for Mr.
    Balchunas, $12,309 for Mr. Balfe, $7,200 for Mr. Cooke and $11,536 for Mr.
    Waisanen); (b) term life insurance premiums paid by the Company ($5,645 for
    Mr. Piecuch, $864 for Mr. Balchunas, $6,225 for Mr. Balfe, $672 for Mr.
    Cooke and $1,583 for Mr. Waisanen); and (c) interest that would have been
    payable by the executive on his interest free loan if the Company required
    interest to be paid ($7,733 for Mr. Piecuch, $12,000 for Mr. Balfe, $424 for
    Mr. Cooke, $6,600 for Mr. Waisanen). In addition, the amounts shown for 1999
    include relocation payments made by the Company ($50,694 for Mr. Balchunas
    and $63,342 for Mr. Cooke).

(3) Mr. Piecuch expends 15% of his time and effort for the benefit of Lafarge
    S.A. Salary and bonus amounts reported are those attributable to his service
    to the Company.

(4) Represents a tax equalization payment reimbursing Mr. Balfe for taxes which
    he paid to Canadian revenue authorities and related expenses as a result of
    his performance of services in Canada, the amount of which equals the
    difference between actual U.S. and Canadian taxes paid and the tax he would
    have paid if only a U.S. tax return had been required, plus tax return
    preparation fees.

                                       15
<PAGE>   19

OPTION EXERCISES AND YEAR-END VALUES

     The following table shows information with respect to stock options
exercised during 1999 and unexercised options to purchase the Company's Common
Stock granted to the Chief Executive Officer and the other named executive
officers and held by them at December 31, 1999.

<TABLE>
<CAPTION>
                                                           NUMBER OF SECURITIES             VALUE OF UNEXERCISED
                                                          UNDERLYING UNEXERCISED            IN-THE-MONEY OPTIONS
                            SHARES                     OPTIONS AT DECEMBER 31, 1999       AT DECEMBER 31, 1999(2)
                           ACQUIRED        VALUE      ------------------------------   ------------------------------
          NAME            ON EXERCISE   REALIZED(1)   EXERCISABLE      UNEXERCISABLE   EXERCISABLE      UNEXERCISABLE
          ----            -----------   -----------   -----------      -------------   -----------      -------------
<S>                       <C>           <C>           <C>              <C>             <C>              <C>
John M. Piecuch.........     5,000        $57,500       103,750           86,250        $719,063          $110,000
Michael J. Balchunas....        --             --        30,250           27,750         243,485            39,391
Edward T. Balfe.........        --             --        86,250           61,250         605,001            90,313
Peter H. Cooke..........        --             --        32,500           51,000         177,657            90,313
Larry J. Waisanen.......        --             --        18,125           44,375          90,078            51,641
</TABLE>

- ---------------
(1) Market value on exercise date minus option exercise price times number of
    options exercised.

(2) Market value at year end ($26.5625) of one share of the Company's Common
    Stock minus option exercise price times number of options.

OPTION GRANTS

     The following table shows information with respect to grants of stock
options pursuant to the Company's 1998 Stock Option Plan during 1999 to the
Chief Executive Officer and the other named executive officers. No stock
appreciation rights were granted 1999.

<TABLE>
<CAPTION>
                                 NUMBER              OPTION GRANTS IN LAST FISCAL YEAR
                              OF SECURITIES   ------------------------------------------------
                               UNDERLYING        PERCENTAGE OF
                                 OPTIONS         TOTAL OPTIONS                                      GRANT DATE
                               GRANTED(1)     GRANTED TO EMPLOYEES     EXERCISE     EXPIRATION   PRESENT VALUE(2)
            NAME                   (#)              IN 1999          PRICE ($/SH)      DATE            ($)
            ----              -------------   --------------------   ------------   ----------   ----------------
<S>                           <C>             <C>                    <C>            <C>          <C>
John M. Piecuch.............     40,000               4.8%             $38.125        2/8/09         $455,600
Michael J. Balchunas........     12,000               1.4%              38.125        2/8/09          136,680
Edward T. Balfe.............     27,500               3.3%              38.125        2/8/09          313,225
Peter H. Cooke..............     21,000               2.5%              38.125        2/8/09          239,190
Larry J. Waisanen...........     22,500               2.7%              38.125        2/8/09          256,275
</TABLE>

- ---------------
(1) All options expire ten years after the grant date and vest in annual 25%
    increments beginning one year after the grant date.

(2) In accordance with Securities and Exchange Commission rules, we have used
    the Black-Scholes option pricing model to estimate the grant date present
    value of the options set forth in this table. Our use of this model should
    not be construed as an endorsement of its accuracy at valuing options. All
    stock option valuation models, including the Black-Scholes model, require a
    prediction about the future movement of the stock price. The real value of
    the options in this table depends upon actual changes in the market price of
    the Company's Common Stock during the applicable period.

                                       16
<PAGE>   20

PERFORMANCE GRAPH

     The following graph compares the yearly percentage change in the cumulative
total shareholder return on the Company's Common Stock with the cumulative total
return of the Wilshire 5000 Index (a broad market equity index) and with the
cumulative total return of a group of peer companies in the construction
materials and cement industry selected by the Company for the period of five
years commencing December 31, 1994 and ending December 31, 1999. The companies
in the peer group index constructed by the Company are as follows: St. Lawrence
Cement, Inc., Texas Industries, Inc., Southdown, Inc., Vulcan Materials Company,
Centex Construction Products Inc. and USG Corp.

              COMPARISON OF FIVE YEAR CUMULATIVE TOTAL RETURN (1)
         AMONG LAFARGE CORPORATION, WILSHIRE 5000 INDEX AND PEER GROUP
                                  [LINE GRAPH]
<TABLE>
<CAPTION>
                                                         LAFARGE                  WILSHIRE 5000               PEER GROUP(2)
                                                         -------                  -------------               -------------
<S>                                             <C>                         <C>                         <C>
1994                                                    $100.00                     $100.00                     $100.00
1995                                                     107.17                      136.49                      130.68
1996                                                     118.33                      165.44                      151.09
1997                                                     176.70                      217.20                      246.78
1998                                                     245.69                      268.11                      347.27
1999                                                     171.09                      331.27                      206.65
</TABLE>

(1) Assumes $100 invested on December 31, 1994 in Lafarge Corporation Common
    Stock, Wilshire 5000 Index and Peer Group Index (constructed by the Company
    as described above). Total return assumes reinvestment of dividends.

(2) Includes St. Lawrence Cement, Inc. (converted to U.S. currency at a constant
    rate), Texas Industries, Inc., Southdown, Inc., Vulcan Materials Company,
    Centex Construction Products Inc. and USG Corp.

RETIREMENT PLANS

     The Company has a trusteed noncontributory defined benefit pension plan for
salaried U.S. employees. The normal retirement age of participants is 65. The
amount of retirement income available to participants under the plan is based
upon the years of credited service (not in excess of 35) and final average
earnings, which is defined to be the average of the highest annual earnings
(which includes salary, bonus and overtime payments) for any 60 consecutive
months during the last 120 months of employment. The annual retirement income
for each year of credited service is equal to 1.50% of the final average
earnings, less 1.50% of annual primary social security benefits. A participant's
accrued benefit under the plan is fully vested on the date on which such
participant completes five years of service under the plan.

     Certain U.S.-domiciled executives of the Company are participants in a
supplemental executive retirement plan (the "SERP") which supplements their
benefits under the Company's retirement plan.

                                       17
<PAGE>   21

Except as described below, the SERP will not be funded in advance for payment of
future benefits; the general assets of the Company are the source of funds for
the SERP. Pursuant to the SERP, the annual retirement income for each year of
credited service for selected executives will be increased from that stated
above to 1.75% of final average earnings, less 1.5% of annual primary social
security benefits. Further, under the SERP, pension payments will be permitted
in excess of the limit of $90,000 per year (as increased annually according to
U.S. Internal Revenue Service rules) applicable under the Company's retirement
plan. Mr. Piecuch, Mr. Balchunas and Mr. Waisanen are participants in the SERP.

     In October 1996, the Company established a trust to securitize SERP
benefits upon a change of control of the Company or of Lafarge S.A. The trust
will remain unfunded until a change in control is imminent, at which time the
trust would become irrevocable and would be funded with cash sufficient to pay
the benefits under the SERP. Also, the SERP was amended to provide that in the
event of a change of control, the eligibility for SERP benefits will be expanded
to cover SERP participants who are vested upon termination of employment but who
are not otherwise eligible for retirement under the Company's retirement plan.
The Board of Directors also adopted a resolution requiring the Company, in the
event of a change of control, to make contributions to the Company's retirement
plan to the maximum extent allowable as a current deduction for federal income
tax purposes.

     The table set forth below illustrates the amount of combined annual pension
benefits payable under the Company's retirement plan and the SERP to
participants in specified average annual earnings and years-of-service
classifications, without taking into account offsets for primary social security
benefits.

                               PENSION PLAN TABLE

<TABLE>
<CAPTION>
                FIVE-YEAR                                      ANNUAL PENSION
                 AVERAGE                             COVERED YEARS OF SERVICE AT AGE 65
                  ANNUAL                    ----------------------------------------------------
                 EARNINGS                   15 YEARS   20 YEARS   25 YEARS   30 YEARS   35 YEARS
                ---------                   --------   --------   --------   --------   --------
<S>                                         <C>        <C>        <C>        <C>        <C>
$50,000...................................  $ 13,125   $ 17,500   $ 21,875   $ 26,250   $ 30,625
100,000...................................    26,250     35,000     43,750     52,500     61,250
150,000...................................    39,375     52,500     65,625     78,750     91,875
200,000...................................    52,500     70,000     87,500    105,000    122,500
250,000...................................    65,625     87,500    109,375    131,250    153,125
300,000...................................    78,750    105,000    131,250    157,500    183,750
350,000...................................    91,875    122,500    153,125    183,750    214,375
400,000...................................   105,000    140,000    175,000    210,000    245,000
450,000...................................   118,125    157,500    196,875    236,250    275,625
500,000...................................   131,250    175,000    218,750    262,500    306,250
550,000...................................   144,375    192,500    240,625    288,750    336,875
600,000...................................   157,500    210,000    262,500    315,000    367,500
</TABLE>

     The years of service credited under the retirement plan and the SERP at
March 1, 2000 to each individual named in the compensation table above who is a
participant in the plan were as follows: Mr. Piecuch -- 13 years (retirement),
22 years (SERP); Mr. Balchunas -- 27 years (retirement), 27 years (SERP); and
Mr. Waisanen -- 23 years (retirement), 23 years (SERP).

                                       18
<PAGE>   22

                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     In 1999, Bertrand Collomb received a salary of $230,000 for serving as
Chairman of the Board of the Company; Bernard Kasriel received a salary of
$120,000 for serving as Vice Chairman of the Board; and John D. Redfern received
a fee of Cdn. $36,400 for serving as Chairman of the Board of our subsidiary,
Lafarge Canada, Inc.

INDEBTEDNESS OF MANAGEMENT

     The Company and our subsidiary, Lafarge Canada, Inc. have extended
non-interest bearing loans to certain of their officers to assist in the
purchase of housing in the course of relocations. With respect to loans with an
outstanding balance in excess of $60,000 at any time during 1999, the largest
aggregate amount of such indebtedness outstanding during 1999 and the amount
thereof outstanding as of December 31, 1999, respectively, were as follows with
respect to the following individuals: Bertrand P. Collomb, Chairman of the
Board -- $67,676, $59,792; John M. Piecuch, President and Chief Executive
Officer -- $101,667, $91,667; Edward T. Balfe, Executive Vice President and
President Construction Materials Group -- $155,000, $145,000; Larry J. Waisanen,
Executive Vice President and Chief Financial Officer, $85,000, $80,000; James J.
Nealis, Vice President, Human Resources -- $181,000, $175,000 and Eric C. Olsen,
Senior Vice President, Strategy and Development, $201,000, $200,642.

TRANSACTIONS WITH MANAGEMENT AND OTHERS

     Effective October 1, 1997, the Company entered into a three-year consulting
agreement with Robert W. Murdoch pursuant to which Mr. Murdoch is paid $4,000
per day for consulting services, not to exceed $100,000 per contract year or
$300,000 in the aggregate during the term of the agreement. During 1999, Mr.
Murdoch was paid approximately $20,000 for consulting services pursuant to the
agreement.

     The Company, our subsidiary Lafarge Canada, Inc. and our majority
stockholder Lafarge S.A. are parties to three agreements concerning the sharing
of costs for research and development, strategic planning, human resources,
communications activities, marketing and technical assistance for the gypsum
wallboard division and the use of certain trademarks. In 1999, the Company and
Lafarge Canada, Inc. recorded expenses under these agreements for the
approximate sums of $4,375,000 and Cdn. $4,287,000, respectively. The Company
and Lafarge Canada, Inc. have entered into agreements with Lafarge S.A. under
which Lafarge S.A. pays for certain services provided to Lafarge S.A. by the
Company and Lafarge Canada, Inc. In 1999, charges to Lafarge S.A. for these
services totaled approximately $180,000.

     During 1999, the Company and Lafarge Canada, Inc. purchased products from
Lafarge S.A. and certain of its affiliates in the ordinary course of business.
These purchases totaled approximately $68,044,000 and Cdn. $742,000 for the
Company and Lafarge Canada, Inc., respectively.

     Messrs. Collomb, Kasriel, Lefevre, Murdoch, Piecuch and Rose are also
directors or officers of Lafarge S.A.

                                       19
<PAGE>   23

        ITEM 2 -- RATIFICATION OF APPOINTMENT OF INDEPENDENT ACCOUNTANTS

     Arthur Andersen LLP audited the consolidated financial statements of
Lafarge Corporation for the fiscal year ended December 31, 1999. Upon the
recommendation of the Audit Committee, the Board of Directors has appointed
Arthur Andersen LLP as the Company's independent accountants to audit its
consolidated financial statements for the fiscal year ended December 31, 2000.
Although we are not required to seek stockholder approval of this appointment,
the Board of Directors believes it to be sound corporate practice to do so. If
the appointment is not ratified, the Audit Committee will investigate the
reasons for your rejection and the Board will reconsider the appointment.

     We expect one or more representatives of Arthur Andersen LLP to attend the
meeting, where they will be available to respond to appropriate questions. They
also will have an opportunity to make a statement if they so desire.

     Our Board of Directors recommends that you vote FOR ratification of the
appointment of Arthur Andersen as Lafarge Corporation's independent accountants
for the fiscal year ended December 31, 2000.

                                       20
<PAGE>   24

        ITEM 3 -- PROPOSED AMENDMENT TO THE ARTICLES OF INCORPORATION TO
                        INCREASE AUTHORIZED COMMON STOCK

     The Board of Directors believes that it is in Lafarge Corporation's best
interest to amend the Company's Articles of Incorporation to increase the number
of shares of Common Stock the Company is authorized to issue from 110,100,000 to
150,000,000.

     As of January 1, 2000, approximately 68.7 million shares of the Company's
currently authorized Common Stock were issued and outstanding. Of the remaining
authorized shares, approximately 17.7 million were reserved for issuance
pursuant to the Company's stock option and purchase plans, the Company's
optional dividend reinvestment plan and upon exchange of the Exchangeable
Preference Shares of our subsidiary, Lafarge Canada, Inc., leaving approximately
23.7 million shares available for issuance for other corporate purposes.

     The proposed amendment will provide additional authorized shares of Common
Stock for future issuance by the Company. The Board believes that the current
number of authorized shares of Common Stock are insufficient to cover possible
future issuances of shares from time to time. Increasing the number of
authorized shares will provide the Company with the flexibility to make future
issuances as may be necessary, in connection with potential acquisitions that
may present themselves or other corporate transactions that may be considered
from time to time. The proposed amendment will provide the Company with
flexibility to accomplish such transactions as they arise and to achieve other
business and financial objectives in a timely manner by avoiding potential
delays associated with seeking stockholder approval, except as may be required
by the Company's Articles or Bylaws, applicable law or the rules of any stock
exchange or other system on or through which the Company's securities may then
be listed or traded. The Board will determine the terms of any such issuance of
additional shares.

     Except for our majority stockholder Lafarge S.A., who has certain rights to
purchase securities from the Company through its Option Agreement with the
Company dated November 1, 1993, all or any of the authorized shares may be
issued without first offering those shares to the Company's stockholders for
subscription. The issuance of shares otherwise than on a pro-rata basis to all
stockholders would reduce the proportionate interest in the Company of each
stockholder.

     We have not proposed the increase in the authorized number of shares with
the intention of using the additional shares for anti-takeover purposes,
although we could theoretically use the additional shares to make more difficult
or to discourage an attempt to acquire control of the Company.

     If this proposal is approved, the first paragraph of Article FOURTH of the
Company's Articles of Incorporation will be amended to read as follows:

     FOURTH: the total number of shares of all classes of stock which the
     Corporation shall have the authority to issue is 180,000,000, of which,
     subject to the power of the Board of Directors to classify and reclassify
     unissued shares of Common Stock as provided in the next paragraph, (i)
     30,000,000 shares of the par value of $0.0001 each are to be of the class
     designated "Voting Stock," and (ii) 150,000,000 shares of the par value of
     $1.00 each are to be of the class designated "Common Stock." The aggregate
     par value of all shares of all classes is to be $150,003,000.

     We do not have any current plans, agreements or understandings for stock
issuances which in the aggregate would involve the use of a number of shares
that exceeds the amount currently authorized but unissued.

     The Board unanimously adopted a resolution setting forth the proposed
amendment to the Articles of Incorporation, declaring its advisability and
directing that the proposed amendment be submitted to the stockholders for their
consideration at the annual meeting. If approved by the stockholders, the
amendment will become effective upon filing with and acceptance for record by
the Maryland State Department of Assessments and Taxation of appropriate
articles of amendment.

     Our Board of Directors recommends that you vote FOR the proposed amendment
to our Articles of Incorporation to increase our authorized common stock.
                                       21
<PAGE>   25

                                 OTHER MATTERS

ARE OTHER MATTERS TO BE CONSIDERED AT THE ANNUAL MEETING?

     The Company does not expect any other matters to be presented for
consideration at the annual meeting other than those matters described within
this proxy statement. If any other matters are presented for consideration, the
persons named in the enclosed proxy intend to vote in accordance with their
judgment on each matter considered.

WHEN MUST STOCKHOLDER PROPOSALS FOR THE 2001 ANNUAL MEETING BE SUBMITTED?

     The Company expects to hold the 2001 Annual Meeting during the first week
of May 2001. Stockholders interested in submitting a proposal for inclusion in
the proxy materials for the Company's 2001 annual meeting may do so by following
the procedures prescribed in SEC Rule 14a-8. To be eligible for inclusion,
stockholder proposals must be received at the Company's principal executive
office no later than November 28, 2000. In addition, under the SEC's Rule 14a-4,
the persons named in the proxy for the 2001 annual meeting may vote in their
discretion with respect to any stockholder proposal that is not submitted to the
Company on or before February 6, 2001.

WHO WILL BEAR THE COST OF SOLICITING PROXIES FOR THE ANNUAL MEETING?

     The Company will bear the cost of soliciting proxies for the annual
meeting. In addition to solicitation by mail, certain officers and employees of
the Company, who will receive no additional compensation for their services, may
solicit proxies in person or by telephone or telefax.

HOW DO I OBTAIN A COPY OF THE COMPANY'S FORM 10-K ANNUAL REPORT?

     The Company will send the Company's Form 10-K Annual Report without charge
to any stockholder who requests a copy in writing. Please direct your request to
David C. Jones, Vice President -- Legal Affairs and Secretary, Lafarge
Corporation, P.O. Box 4600, Reston, Virginia 20195.
                                          By Order of the Board of Directors,

                                            /s/ David C. Jones
                                               DAVID C. JONES
                                          Vice President -- Legal
                                           Affairs and Secretary

Reston, Virginia
March 28, 2000

                                       22
<PAGE>   26
(FRONT OF CARD)

                               LAFARGE CORPORATION

                    PROXY FOR ANNUAL MEETING OF STOCKHOLDERS
                                   MAY 2, 2000

           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

The undersigned hereby appoints Bertrand P. Collomb, John D. Redfern and John M.
Piecuch (acting by majority or, if only one be present, by that one alone), and
each of them, proxies, with power of substitution in each, and hereby authorizes
them to represent and to vote, as designated on the reverse side, all shares of
Common Stock of Lafarge Corporation (the "Company") standing in the name of the
undersigned on March 6, 2000, at the Annual Meeting of Stockholders to be held
on May 2, 2000 in McLean, Virginia, and at any adjournment thereof.

THIS PROXY WILL BE VOTED AS SPECIFIED ON THE REVERSE SIDE. HOWEVER, IF NO VOTE
IS SPECIFIED, THIS PROXY WILL BE VOTED "FOR" EACH OF THE NOMINEES FOR DIRECTOR,
"FOR" THE PROPOSAL TO RATIFY THE APPOINTMENT OF ARTHUR ANDERSEN LLP AS
INDEPENDENT ACCOUNTANTS, AND "FOR" THE AMENDMENT TO THE ARTICLES OF
INCORPORATION INCREASING THE NUMBER OF AUTHORIZED SHARES OF COMMON STOCK; ALL OF
WHICH MATTERS ARE MORE FULLY DESCRIBED IN THE PROXY STATEMENT OF WHICH THE
UNDERSIGNED STOCKHOLDER ACKNOWLEDGES RECEIPT.

THIS PROXY GRANTS DISCRETIONARY AUTHORITY TO VOTE IN ACCORDANCE WITH THE BEST
JUDGMENT OF THE NAMED PROXIES ON OTHER MATTERS THAT MAY COME BEFORE THE MEETING.

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------
     PLEASE VOTE, DATE AND SIGN ON THE OTHER SIDE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE

- -------------------------------------------------------------------------------------------------------
This proxy should be signed exactly as your name(s) appear(s) hereon.  Joint owners should both sign.
If signing as attorney, executor, guardian, or in some other representative capacity, or as officer
of a corporation, please indicate your capacity or title.
- -------------------------------------------------------------------------------------------------------
<S>                                                      <C>
HAS YOUR ADDRESS CHANGED?                                 DO YOU HAVE ANY COMMENTS?

- --------------------------------------------              ---------------------------------------------

- --------------------------------------------              ---------------------------------------------

- --------------------------------------------              ---------------------------------------------
</TABLE>

(BACK OF CARD)

[x]  PLEASE MARK VOTES
    AS IN THIS EXAMPLE
<TABLE>
<S>                                                    <C>                                     <C>
          -------------------                                                                  For All       With     For All
          LAFARGE CORPORATION                                                                  Nominees      held     except
          -------------------                          1. Election of Directors.                 [ ]         [ ]       [ ]
                                                          The nominees are:

</TABLE>

<TABLE>
        <S>                                 <C>          <C>                      <C>                        <C>
         Mark box at right if an address                  THOMAS A. BUELL           PAUL W. MACAVOY
         change or comment has been noted   [  ]          MARSHALL A. COHEN         CLAUDINE B. MALONE
         on the reverse side of this card.                BERTRAND P. COLLOMB       ROBERT W. MURDOCH         JOE M. RODGERS
                                                          PHILIPPE P. DAUMAN        BERTIN F. NADEAU          MICHEL ROSE
         I PLAN TO ATTEND THE MEETING.      [  ]          BERNARD L. KASRIEL        JOHN M. PIECUCH           RONALD D. SOUTHERN
                                                          JACQUES LEVEVRE           JOHN D. REDFERN           GERALD H. TAYLOR


<CAPTION>
                                                        INSTRUCTIONS:  TO WITHHOLD AUTHORITY TO  VOTE FOR ANY NOMINEE,
                                                        MARK THE "FOR ALL EXCEPT" BOX AND STRIKE A LINE THROUGH THE
                                                        NAME(S) OF THE NAMES OF THE NOMINEES IN THE LIST PROVIDED ABOVE.


<S>                                                    <C>                                      <C>
The signer hereby revokes all proxies heretofore       2.  Approval of appointment of            For  Against  Abstain
given by the signer to vote at said meeting  or            Arthur Andersen LLP as                [ ]    [ ]      [ ]
any adjournments thereof.                                  independent accountants.
                        ------------------------
Please be sure to sign  Date                           3.  Approval of amendment to              For  Against  Abstain
and date this Proxy.                                       Articles of Incorporation             [ ]    [ ]      [ ]
                       -------------------------           increasing the number of
                                                           authorized shares of Common
- ------------------------------------------------           Stock.

                                                       4.  In their discretion, the
Stockholder sign here   Co-owner sign here                 Proxies are authorized to
                                                           vote on such other business
- ------------------------------------------------           as may properly come before
                                                           the meeting or any adjournment
                                                           thereof.

DETACH CARD                                                                                                        DETACH CARD

</TABLE>


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