Exhibit 2.2
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]


                             [Banamex Letterhead]

                              AMENDMENT AGREEMENT

TO THE TRUST AGREEMENT NUMBER 111033-9 ENTERED INTO BY AND BETWEEN CEMEX, S.A.
DE C.V., REPRESENTED HEREIN BY MR. RAMIRO VILLARREAL MORALES, IN HIS CAPACITY
OF SECRETARY OF THE BOARD OF DIRECTORS AND GENERAL ATTORNEY-IN-FACT OF THE
COMPANY, HEREINAFTER AND FOR THE PURPOSES OF THIS AGREEMENT REFERRED TO AS
"CEMEX", AND BANCO NACIONAL DE MEXICO, S.A., GRUPO FINANCIERO BANAMEX,
REPRESENTED HEREIN BY MESSRS. FRANCISCO JOSE BALTAZAR RODRIGUEZ AND MARIA DE
LOS ANGELES MONTEMAYOR GARZA, IN THEIR CAPACITY OF TRUST OFFICERS OF SUCH
INSTITUTION, HEREINAFTER AND FOR THE PURPOSES OF THIS AGREEMENT REFERRED TO AS
THE "TRUSTEE", WHO AGREE TO FORMALIZE THEIR AGREEMENT PURSUANT TO THE
FOLLOWING STATEMENTS AND CLAUSES.

                               ---WITNESSETH---

I. The Parties hereby declare:

      A)   That they mutually acknowledge the legal capacity with which they
           appear to execute this Agreement, having the authority to bind
           their represented parties under the terms and conditions set forth
           herein.

      B)   That on September 6, 1999, they entered into a Trust Agreement
           registered under number 111033-9 to issue the Non-Redeemable
           Ordinary Participation Certificates denominated "CEMEX.CPO",
           referred to herein and for the effects of this Agreement only as
           the "Trust".

      C)   That they ratify the rights and obligations set forth in the Trust.

      D)   That on April 25, 2002, "Cemex, Sociedad Anonima de Capital
           Variable", held n Extraordinary General Shareholders Meeting,
           whereby it was agreed to amend certain articles of its bylaws to
           adequate its language and comply with the new provisions of the
           Securities Market Law ("Ley del Mercado de Valores"), as well as to
           include in its bylaws, additional provisions to those set forth in
           the General Law of Commercial Companies ("Ley General de Sociedades
           Mercantiles") to introduce measures to prevent the acquisition of
           stock that grant the control of the corporation, either directly or
           indirectly, having been protocolized through public deed number
           75,536 dated July 4th, 2002, granted before Mr. Juan Manuel Garcia
           Garcia, Notary Public Number 129, practicing in the city of San
           Pedro Garza Garcia, Nuevo Leon, which was duly recorded in the
           Public Registry of Commerce of the corporate address of

<page>

[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

           CEMEX. A certified copy of such public deed is attached to this
           amendment agreement in the form of "Exhibit A".

      E)   That in the above-mentioned Meeting, the company was authorized to
           amend trust agreement number 111033-9 in which Banco Nacional de
           Mexico, S.A. acts as Trustee, to amend its clauses to the statutory
           amendments and agreements adopted in the Extraordinary Meeting,
           authorizing the Chairman and Secretary of the Board of Directors,
           who may act jointly or severally, to formalize the amendment to the
           trust agreement issuing the "CEMEX.CPO".

      F)   That the Technical Committee of the TRUST, in its session dated
           November 7, 2002, agreed to instruct the TRUSTEE, authorizing it to
           formalize the amendment to the above-referenced trust agreement, in
           order to comply with the resolutions adopted in the Extraordinary
           General Shareholders Meeting of Cemex, S.A. de C.V., held on April
           25, 2002. A certified copy of the corresponding minutes is attached
           to this amendment agreement in the form of "Exhibit B".

      G)   That on November 5, 2002 a General Meeting of Non-Redeemable
           Ordinary Participation Certificate "CEMEX.CPO" Holders was held,
           whereby it was agreed to amend clauses Seven, Eight and Nine of the
           issuance deed of the Non-Redeemable Ordinary Participation
           Certificates "CEMEX.CPO", as well as clauses Fourth, Fifth and
           Eleventh of trust agreement number 111033-9, having been
           protocolized through public deed number 29.688 dated November 14,
           2002, granted before Mr. Francisco Garza Calderon, Notary Public
           Number 75, practicing in the city of San Pedro Garza Garcia, Nuevo
           Leon. A certified copy of such public deed is attached to this
           amendment agreement in the form of "Exhibit C".

      H)   That the TRUSTEE and CEMEX jointly filed a document before the
           National Banking and Securities Commission ("Comision Nacional
           Bancaria y de Valores") requesting its approval for the amendment
           of clauses Seven, Eight and Nine of the issuance certificate of the
           Non-Redeemable Ordinary Participation Certificates "CEMEX.CPO", as
           well as clauses Fourth, Fifth and Eleventh of trust agreement
           number 111033-9.

      I)   That they freely enter into this Agreement, pursuant to the
           following:

                                    ---CLAUSES---

FIRST:  PURPOSE OF THE AGREEMENT.
This Agreement is being executed for purposes of expressly evidencing the
amendments to the rights and obligations of each of the parties appearing
under any capacity in the TRUST, binding them to subject themselves to the
terms and conditions that arise as a result of the execution of this
instrument.


                                      2
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]


SECOND:  OF THE TOTAL ASSETS AND ITS INCREMENTS.
The parties hereby agree to amend clauses Fourth, Fifth and Eleventh of the
TRUST, which shall read as follows:

      "FOURTH:  RIGHTS AND OBLIGATIONS:

         a.    HOLDERS OF "CPO's": The individuals or legal entities, bodies,
               trusts or companies, either Mexican or foreign, that acquire
               the "CPO's" issued pursuant to this "TRUST", and the
               individuals or legal entities, bodies, trusts or companies,
               either Mexican or foreign, that adhere to it by means of a
               contribution of "SHARES".

               The persons referred to in the preceding paragraph, by the mere
               fact of acquiring and holding the "CPO's", and for the mere
               contribution of the "SHARES", shall be subject to the terms,
               conditions and provisions contained in this Agreement and its
               respective amendments to be implemented, and the respective
               Issuance Deed and the certificate or certificates that
               represent the "CPO's", and in according with the provisions of
               Articles 7 (seven) and 10 (ten) of the Corporate Bylaws of
               "CEMEX", in connection with the "CPOs" transfer restrictions or
               for the acquisition of material portions of the capital of
               "CEMEX".

         b.    "CEMEX" AND THE "ADHESIVE SETTLORS OF THE TRUST": Regarding
               "CEMEX", it shall have the sole and only right to receive from
               "THE TRUSTEE", the proceeds from the placement through a public
               offering of the issuance of "CPO's", provided that the "SHARES"
               have been previously contributed as a result of the issuance or
               repurchase of said "SHARES" in accordance with applicable Law,
               and "CEMEX" shall also have the right to receive the proceeds
               of the placement of "CPO's" that "THE TRUSTEE" may have
               repurchased with funds contributed by "CEMEX" or that "THE
               TRUSTEE" may have directly repurchased; and in connection with
               the "ADHESIVE SETTLORS OF THE TRUST" that contributed "SHARES"
               for purposes of placing such "SHARES" among the investing
               public, they shall have the right to receive from "THE TRUSTEE"
               the proceeds of the offerings through the issuance of "CPO's".

         c.    The "SETTLORS" that adhere to this Agreement to obtain "CPO's"
               with respect to the "SHARES" contributed to the "TRUST", as
               well as the persons, bodies or legal entities that acquire
               "CPO's", shall have, subject to the provisions of this
               agreement, the economic and voting rights with respect to THE
               "SHARES" that represent their respective "CPO's" holding
               proportions regarding the total assets of the "TRUST". In
               addition, the holders of "CPO's" shall have the right to
               receive the net proceeds resulting from the sale of "THE


                                      3
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

               SHARES" that form the corresponding proportion of the Total
               Assets of the "TRUST" corresponding to each "CPO", or such
               "SHARES" or participation certificates issued by the "MASTER
               TRUST" in strict compliance with the terms and conditions
               agreed in this Agreement."

"FIFTH: PURPOSES OF THE "TRUST".
The purposes of the Trust are:

         a.    That "THE TRUSTEE" acquires and maintains the trust property of
               the "SHARES" that form part of the assets of this "TRUST".

         b.    That "THE TRUSTEE":

               b.1   subscribe the "SHARES" to be issued or repurchased by
                     "CEMEX" for purposes of their public offering in
                     compliance with the applicable legal provisions, through
                     the contribution of "CPO's" to this Trust, and in such
                     event deliver to "CEMEX" the value of such "SHARES" with
                     the proceeds of the offering; furthermore, that "THE
                     TRUSTEE", with the proceeds contributed by "CEMEX" for
                     such purposes, reacquires "CPO's" for purposes of their
                     further offering in the terms of applicable law.

               b.2   To acquire the trust property of those "SHARES"
                     contributed by the "ADHESIVE SETTLORS OF THE TRUST", and

               b.3   To acquire the trust property of those "SHARES" resulting
                     from (i) capital stock increases derived from
                     capitalization of reserves or earnings, and restructuring
                     of the "SHARES", or (ii) in the event of the shares
                     resulting from mergers or spin-offs in which "CEMEX"
                     participates, and (iii) additionally to subscribe and
                     pay, conditioned to the previous contribution of the
                     funds required therefor by the BENEFICIARIES, the
                     "SHARES" resulting from capital stock increases by means
                     of additional contributions or reinvestment of
                     distributed earnings.

         c.    That, further to the terms of this Agreement, "THE TRUSTEE"
               issues "CPO's" to be acquired by the individuals or legal
               entities, of either Mexican or foreign nationality, provided
               that "THE TRUSTEE" may only issue one CPO per three common
               ordinary "SHARES" of "CEMEX" stock, two of which shall be
               Series "A" shares, and one shall be Series "B" shares,
               contributed to this Trust and that form part of the capital of
               this "TRUST", consequently, an equal part of the Trust Assets
               that will correspond to each "CPO" shall be conformed by two
               Series "A" shares and one Series "B" shares, representing the
               common, ordinary


                                      4
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

               capital stock of "CEMEX"; provided that such
               equal part may be amended by virtue of capitalization,
               reinvestment of distributed earnings, restructuring of
               "SHARES", reductions of capital, amortization of "SHARES", or
               by mergers or spin-offs in which "CEMEX" participates.

         d.    That "THE TRUSTEE" shall transfer, through S.D. Indeval, S.A.
               de C.V., the "CPO's" to be issued with respect of "THE SHARES",
               to the corresponding national or foreign investors who are
               entitled to such "CPO's", and in the same manner to the
               national or foreign investors that have contributed "SHARES"
               owned by them, to the "TRUST".

         e.    That `"THE TRUSTEE"', through S.D. Indeval, S.A. de C.V., shall
               keep "SHARES" in deposit, provided that such deposit may be
               accomplished through one or more other institutions for the
               deposit of securities in accordance with the provisions of
               applicable Law.

         f.    That "THE TRUSTEE" shall exercise the economic and corporate
               rights vested on "SHARES", provided that the voting rights
               shall be exercised through the respective attorneys-in-fact,
               further to the following guidelines:

               f.1   The "BENEFICIARIES" of Mexican Nationality shall have the
                     right to attend the Shareholders Meetings of "CEMEX"
                     either personally or by means of an attorney-in-fact for
                     purposes of representing and exercising the corporate
                     rights vested in "THE SHARES" that conform the respective
                     portion of the Total Assets of the "TRUST" which
                     corresponds to their respective "CPO" holdings, and for
                     these purposes it shall be sufficient to give an
                     instruction addressed to "THE TRUSTEE" with at least 72
                     (seventy-two) hours in advance to the date and time set
                     for the Shareholders Meeting of "CEMEX", and shall
                     jointly submit sufficient evidence, at the discretion of
                     "THE TRUSTEE", regarding their current "CPO's" holdings,
                     the nationality of the holder and the nationality of the
                     effective beneficiary of the "CPO's" in accordance with
                     the terms and conditions contained in this agreement; on
                     the other hand, in the event that it may be legally
                     applicable, "THE TRUSTEE" will issue in favor of the
                     corresponding "BENEFICIARY" or his respective
                     attorney-in-fact, the written document evidencing the
                     number of "SHARES" entitled to vote which islegally
                     entitled to represent at such Shareholders Meeting,
                     granting the corresponding Proxy.

               f.2   The "BENEFICIARIES" shall be entitled to exercise the
                     voting rights of THE "SHARES" that conform the Total
                     Assets of the "TRUST", subject to the terms and
                     conditions set forth below.


                                      5
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

                     f.2(i)   The "BENEFICIARIES" of Mexican Nationality shall
                              exercise the voting rights with the
                              representation granted in its case by "THE
                              TRUSTEE" further to the terms of Section f.1
                              above.

                          For purposes of this Agreement, "BENEFICIARIES" of
                          Mexican Nationality shall mean: (i) the individuals
                          of Mexican nationality, and (ii) the legal entities
                          whose By-laws include the Foreign Investors
                          Exclusion Clause, understood as the agreement or
                          express pact that, either directly or indirectly, no
                          foreign shareholders or partner or corporations with
                          foreign investment admission clause, shall be
                          admitted to participate in such entities.

                     f.2(ii)  The "BENEFICIARIES" of Foreign Nationality
                              and the "BENEFICIARIES" which are Mexican
                              entities that directly or indirectly admit the
                              participation of foreign individuals, entities,
                              trusts, funds, Governments or any other legal
                              entities with or without personality, or whose
                              By-laws include a foreign investment admission
                              clause, shall be entitled to attend the
                              Shareholders Meetings of "CEMEX" in the terms of
                              paragraph (f.1), solely for the purposes of
                              representing and exercising the voting right of
                              the Series "B" shares (or shares with
                              unrestricted circulation) that conform the
                              respective portion of the total assets of this
                              "TRUST" corresponding to their "CPO's" holdings,
                              which shall be fully evidenced jointly with
                              their nationality, at the time in which they
                              deliver to "THE TRUSTEE" the respective
                              instruction with within the anticipation set
                              forth in this Agreement.

                     f.2(iii) The instructions to the given by the
                              "BENEFICIARIES" pursuant to this section (f.1)
                              shall be in written form, and shall indicate in
                              every case the complete name, nationality (such
                              nationality shall be duly proven with a public
                              document), evidence of being the lawful holder
                              of the "CPO's", the number of "CPO's" that such
                              holder is recognized to own, and in the event
                              that they elect that "THE TRUSTEE" represent THE
                              "SHARES" corresponding to their "CPO's"
                              holdings, the direction of the vote in each and
                              every item to be discussed during the
                              Shareholders Meeting of "CEMEX", in accordance
                              with the agenda set forth in the call for the
                              respective meeting, and any other information
                              and/or documentation necessary or convenient
                              that "THE TRUSTEE" requests for identification
                              or

                                      6
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

                              verification purposes. For purposes of the
                              provisions set forth in the Corporate By-laws of
                              "CEMEX" with respect to the acquisition,
                              holdings, ownership and transfer of "SHARES",
                              the "BENEFICIARIES" upon acquiring the "CPO's"
                              as a result by any act or legal form, shall do
                              so in a manner that, in respect of "THE SHARES"
                              conforming the corresponding proportion of the
                              "CPO's" acquired, complies with such provisions
                              of the by-laws, in addition to the provisions of
                              this Agreement, consequently all acquisitions of
                              "CPO's" shall be deemed as an acquisition and
                              transfer of "THE SHARES" that conform the "TOTAL
                              ASSETS" of "THE TRUST" corresponding to such
                              "CPO's", and if the provisions of the Corporate
                              By-laws of "CEMEX" or the terms of this
                              Agreements are not complied with, the respective
                              "BENEFICIARIES" will lack capacity to instruct
                              "THE TRUSTEE" with respect to the vote, nor will
                              they shall have the right to represent and vote
                              "THE SHARES" conforming the corresponding
                              proportion of the Total Assets of the "TRUST"
                              that correspond to their "CPO" holdings. The
                              "BENEFICIARIES" may freely use letters, telefax
                              or any other electronic mean, either through
                              computer or any other telecommunication devices,
                              to send their instructions, but at all times
                              complying with the terms and conditions set
                              forth in this Agreement.

                     f.2(iv)  "THE TRUSTEE" will vote of the Series "A"
                              "SHARES" (and such shares that may only be
                              acquired by persons of Mexican Nationality) that
                              conform the total assets of the "TRUST", which
                              proportionally correspond to the "CPO's" held by
                              foreign "BENEFICIARIES", in the same direction
                              expressed by the Shareholders that represent the
                              majority of the Capital Stock entitled to vote.

                     f.2(v)   "THE TRUSTEE" will attend the Shareholders
                              Meetings of "CEMEX" to represent and vote "THE
                              SHARES" of any Series or class that conform the
                              total assets of the "TRUST" and in respect of
                              which no instructions were received from the
                              "BENEFICIARIES" further to the terms and
                              conditions deemed appropriate, except for the
                              provisions of the preceding paragraph.

               f.3   In connection with the representation of "THE SHARES" at
                     any intended Shareholders Meeting of "CEMEX", it will be
                     necessary that


                                      7
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

                     the "BENEFICIARIES" and "THE TRUSTEE" comply with the
                     provisions of Articles 7 (seven) and 10 (ten) of the
                     Corporate Bylaws of "CEMEX" in connection with the "CPO"
                     transfer restrictions or to acquire material portions of
                     the capital stock of "CEMEX".

         g.    That "THE TRUSTEE", through S.D. Indeval, S.A. de C.V., shall
               subscribe the approved increases in the capital stock of
               "CEMEX", in accordance with the provisions of clause Eighth
               below, provided that "THE TRUSTEE" timely receives the
               necessary funds from the Holders that desire to increase their
               "CPO's" with the subscription to be made by "THE TRUSTEE".

         h.    That "THE TRUSTEE", through S.D. Indeval, S.A. de C.V., collect
               the cash dividends approved by "CEMEX" and distribute such
               dividends among the "CPO's" Holders in proportion with their
               holdings. With respect to "THE SHARES" issued as a result of
               capital increases derived from capitalization of reserves or
               earnings, or derived from restructuring of the shares that form
               the capital stock of "CEMEX", or resulting from the
               reinvestment of earnings or shares delivered by mergers or
               spin-offs in which "CEMEX" participates, "THE TRUSTEE" shall
               receive and subscribe such "SHARES", and make them a part of
               the total assets of "THE TRUST", which in such case shall
               conform a part of the respective portion corresponding to each
               CPO.

         i.    That "THE TRUSTEE" shall proceed, further to the provisions of
               clause Ninth below, to withdraw from circulation the
               corresponding "CPO's" in the event that "CEMEX" redeems "THE
               SHARES" or reduces the Capital Stock by means of the respective
               reimbursement.

         j.    That at the expiration of the term of this Agreement, and
               further to the terms of clause Eleventh herein, "THE TRUSTEE"
               shall proceed:

               j.1   In the case of the "BENEFICIARIES" of Mexican
                     nationality, as defined in section f.2 of this clause, to
                     withdraw from circulation and to cancel the "CPO's",
                     awarding in favor of such "BENEFICIARIES" the
                     proportional part of the total assets of the "TRUST" in
                     accordance with their proportional holdings.

               j.2.  In the case of the "BENEFICIARIES" of foreign
                     nationality, as well as the "BENEFICIARIES" which are
                     Mexican entities that directly or indirectly admit the
                     participation of foreign governments, individuals, or
                     legal entities, acting with or without individual
                     capacity, to withdraw from circulation and cancel the
                     "CPO's", (i) to transfer in favor of such "BENEFICIARIES"
                     only the Series "B" shares (or shares of unrestricted
                     circulation) that form part of the total assets of


                                      8
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

                     the "TRUST" and that proportionally correspond to their
                     "CPO" holdings, and (ii) with respect to the Series "A"
                     Shares (or those shares whose holdings are limited to
                     Mexican nationals) that form part of the total assets of
                     the "TRUST" and proportionally correspond to their "CPO"
                     holdings, to contribute such "SHARES" to Trust No. 771-7
                     named "Master Trust for Neutral Investments" executed by
                     Nacional Financiera, S.N.C. as trustee, on November 24,
                     1989 (hereinafter, and for identification purposes, this
                     trust shall be referred to as the "MASTER "TRUST"), in
                     accordance with the approvals that are to be granted by
                     the relevant authorities, and shall proceed to exchange
                     the Ordinary Participation Certificates to be issued
                     based on said Trust to the respective "BENEFICIARIES",
                     through S.D. Indeval, S.A. de C.V., in accordance with
                     the provisions of Clause Eleventh herein.

               j.3   The provisions of sections j.1 and j.2 above shall not be
                     applicable in the cases in which the transfer implies the
                     acquisition, transfer or encumbrance in any way of shares
                     or the rights inherent thereto with respect to the CPO's
                     or Shares which represent 2% (two percent) of the Capital
                     Stock of "CEMEX", or that, in the event of an acquisition
                     of the Property of "CPOs" or Shares represents 20%
                     (twenty percent) or more of the Capital Stock of "CEMEX",
                     in which case and for these purposes, "THE TRUSTEE" shall
                     be bound to the provisions of Articles 7 (seven) and 10
                     (ten) of the Corporate Bylaws of "CEMEX" in connection
                     with the "CPO" transfer restrictions or to acquire
                     material portions of the capital stock of "CEMEX".

         k.    That "THE TRUSTEE" shall proceed, further to the instructions
               received from the Technical Committee designated hereinbelow,
               to exchange the Securities that are representing "CPO's" that
               are outstanding, for the new Securities in the event that the
               Total Assets of "THE TRUST" is modified as a result of
               capitalization, reinvestment of distributed earnings,
               restructuring of "SHARES", reductions of capital stock of
               "CEMEX", redemption of "SHARES", or by mergers or spin-offs in
               which "CEMEX" participates. Furthermore, in the event the terms
               and conditions under which such "CPO's" should be issued are
               amended.

         l.    That "THE TRUSTEE", upon receipt of the required funds from
               "CEMEX", shall temporarily acquire the "CPO's" issued, further
               to the terms and conditions that the Technical Committee
               instructs in writing, subject to the provisions of article 14
               Bis 3, section I, of the Securities Market Law ("Ley del
               Mercado de Valores") and the related general applicable
               provisions issued by the Comision Nacional Bancaria y de
               Valores.


                                      9
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

         m.    That "THE TRUSTEE", further to the instructions of the
               Technical Committee, shall proceed with the exchange referred
               to in Clause First herein; and proceed to apply for the
               registration of the "CPO's" in the National Registry of
               Securities ("Registro Nacional de Valores"), and before the
               applicable authorities and regulatory bodies of other countries
               with recognized markets, for purposes of registry and listing
               the "CPO's" in the Securities Exchanges of Mexico and other
               countries with recognized Markets."

"ELEVENTH: TERM.
The term of this Agreement shall be thirty (30) years counted since September
six (6), nineteen hundred and ninety-nine (1999), date of if its execution. As
long as this Trust and the trust referred to in the next paragraph remain in
effect, the Total Assets of the Trust shall remain devoted to the stated
purposes; both Trust are irrevocable.

Simultaneously with the termination date of the "TRUST", and with the
participation of the Common Representative of the "CPO" Holders, shall proceed
to settle an Irrevocable Trust with a fiduciary institution expressly
authorized for such effects in accordance with applicable laws and subject to
the terms and conditions set forth from time to time by the Technical
Committee, to which "THE TRUSTEE" shall contribute the "SHARES" which are part
of the total assets of the "TRUST", provided that the new Trust shall contain
the purposes, term, rights and obligations which as of such date are set forth
in this "TRUST". For these purposes, the trustee of the new Trust shall
proceed, further to the instructions given by the technical committee, to
substitute the outstanding "CPO's" with the "CPO's" which in its case may be
issued by the institution acting as Trustee for the new Trust.

The "TRUST" may be terminated by any of the events set forth in article 392
(three hundred and ninety-two) of the General Law of Negotiable Instruments
and Credit Transactions ("Ley General de Titulos y Operaciones de Credito")
and which is compatible with this "TRUST", and in such event "THE TRUSTEE",
with the participation of the Common Representative of the `"CPOs" Holders,
and further to the provisions of Clause Fifth section (j), shall proceed as
follows:

         a.    Shall carry-out the necessary acts to withdraw the "CPO's" that
               are owned by Mexican individuals or by Mexican Legal Entities
               whose by-laws contain the "Foreign Investment Exclusion Clause"
               directly or indirectly (through other corporations or legal
               entities) from the market, for purposes of delivering to such
               persons the corresponding portion of the total assets of the
               "TRUST" with respect to their holdings, with the exception of
               the occurrence of any of the events set forth in Articles 7
               (seven) and 10 (ten) of the Corporate By-laws of "CEMEX",
               referred to in Clause Fifth, Section j.3 (in connection with
               the restrictions for the transfer of shares or to acquire
               material portions of the Capital Stock) in which event shall
               proceed further to the terms of such article. The exchange of
               the "CPO's" and the delivery of the "SHARES" that conform


                                      10
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

               the total assets of the "TRUST" shall be done through S.D.
               Indeval, S.A. de C.V.

         b.    Shall carry-out the necessary acts to withdraw the "CPO's" that
               are held by foreign persons or by Mexican Entities that do not
               have, directly and indirectly (through other corporations or
               entities), the "Foreign Investment Exclusions Clause", from the
               market, and proceed as follows:

               b.1   Regarding the Series "A" Shares (or shares with
                     restricted circulation whose holdings are limited to
                     Mexican nationals) that are part of the total assets of
                     the "TRUST", shall contribute in trust to the "MASTER
                     TRUST" the corresponding part with respect to the ones
                     such "CPO's" were issued, provided that per each of the
                     "CPO's", Nacional Financiera, S.N.C. shall deliver to the
                     "BENEFICIARIES" the Ordinary Participation Certificates
                     issued based on the "MASTER TRUST" and that legally
                     correspond the such holders in proportion to their
                     holdings;

               b.2   Regarding the Series "B" Shares (or shares with
                     unrestricted circulation) that are part of the total
                     assets of the "TRUST", shall deliver to such
                     "BENEFICIARIES" the corresponding portion of the total
                     assets of the "TRUST" with respect to their holdings,
                     with the exception set forth in paragraph a) of this
                     clause; and

               b.3   in the absence of, and at the request of the
                     "BENEFICIARIES" referred to in this paragraph, shall
                     proceed to transfer the necessary and sufficient Series
                     "A" shares (or shares with restricted circulation whose
                     holdings are limited to Mexican nationals) forming part
                     of the "TRUST" assets to deliver to such "BENEFICIARIES"
                     the corresponding portion of the proceeds of the sale,
                     with respect to their holdings.

               b.4   The exchange of the "CPO's", the delivery of the Ordinary
                     Participation Certificates issued based on the "MASTER
                     TRUST", the delivery of the Series "B" Shares (or shares
                     with unrestricted circulation) that are part of the total
                     assets of the "TRUST" and, as the case may be, the
                     delivery of the sale proceeds of the Series "A" Shares
                     (or shares with restricted circulation whose holdings are
                     limited to Mexican nationals) contributed to the Trust
                     and that legally corresponds to them in according to
                     their proportions, shall be done through S.D. Indeval,
                     S.A. de C.V. or '"THE TRUSTEE"', when legally applicable.


                                      11
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

In any of these events "THE TRUSTEE" shall timely proceed with the
cancellation of the "CPO's" once "THE TRUSTEE" has performed the corresponding
legal actions.

With respect to the provisions of paragraph b.1 above, "THE TRUSTEE" is hereby
bound to perform the necessary actions in order for Nacional Financiera,
S.N.C., in its capacity as Trustee of the "MASTER TRUST", to issue
non-redeemable ordinary participation certificates based on such "MASTER
TRUST", in order that such Certificates may be delivered to the
"BENEFICIARIES" referred to in such paragraph b.1 above.

The termination of this Agreement shall be subject, in any event, to the
provisions of article 228t (two hundred twenty-eight letter t) of the General
Law of Negotiable Instruments and Credit Transactions, which reads as follows:
"ARTICLE 228t.- The trust pursuant to which the issuance us being made shall
not be extinguished while there are unpaid balances as a result of credits
against the trust capital, the certificates or a participation in the products
or earnings"."

THIRD:  TERM AND CONTINUITY.
The parties agree to be bound by all the terms set forth in the TRUST and this
Agreement; the rights and obligations of all of the parties in such documents
shall remain in effect, there being no novation of the TRUST. This Agreement
is effective between the parties as of its execution date.

HAVING THIS AGREEMENT BEEN READ BY THE PARTIES WHO HAVE BEEN MADE AWARE OF ITS
CONTENTS AND LEGAL EFFECT, IT IS EXECUTED IN SAN PEDRO GARZA GARCIA, NUEVO
LEON, ON NOVEMBER 21, 2002.


                                     CEMEX

                             [Illegible Signature]
                              Cemex, S.A. de C.V.
             Mr. Ramiro Villarreal Morales. Secretary of the Board
                      of Directors and Attorney-In-Fact.


<table>
<caption>

                                  THE TRUSTEE
                        Banco Nacional de Mexico, S.A.
                           Grupo Financiero Banamex

<s>                                    
         [Illegible Signature]                   [Illegible Signature]
Mr. Francisco Jose Baltazar Rodriguez.  Ms. Maria de los Angeles Montemayor Garza.
           Trust Officer.                             Trust Officer.
</table>


                                      12
            Amendment Agreement to Trust Agreement Number 111033-9
<page>
[Translation note:  On the upper left side of each page
appears a seal in which, among other, the following text
may be identified:  "Lic. Erick Salvador Pullian Aburto.
Notary Public No. 196, Mexico, Federal District."]

                                       [Translation note:  On each page appears
                                      a seal in which the following text may be
                                  identified:"Notary Public No. 120, Principal.
                                              Lic. Jose Luis Farias Montemayor.
                                         Monterrey, N.L. Mex. First District."]

I, ATTORNEY-IN-FACT JOSE LUIS FARIAS MONTEMAYOR, Notary Public Number 120 with
authorization to practice in the First Registration District, hereby evidence
and CERTIFY: That this copy is integrated by eleven pages being a legitimate
reproduction of its original which I have before me and I issue for the
benefit of the interested party, registering this document under number
59333/2002 of the Open Minute Registry Book, in Monterrey, Nuevo Leon, United
Mexican States on the 22nd day of the month of November, 2002. IN WITNESS
WHEREOF.

                             [Illegible Signature]
                          JOSE LUIS FARIAS MONTEMAYOR
                           Notary Public Number 120
                                FAML-371126-IE0










                                      13
            Amendment Agreement to Trust Agreement Number 111033-9