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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                            _______________________

                                    FORM 6-K

       REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 or 15d-16
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                            _______________________

                       Date of Report: February 15, 2005

                              CEMEX, S.A. de C.V.
                              ___________________
             (Exact name of Registrant as specified in its charter)

                                  CEMEX Corp.
                                  ___________
                (Translation of Registrant's name into English)

                             United Mexican States
                             _____________________
                (Jurisdiction of incorporation or organization)

          Av. Ricardo Margain Zozaya #325, Colonia del Valle Campestre
                     Garza Garcia, Nuevo Leon, Mexico 66265
          ____________________________________________________________
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.

Form 20-F __X__       Form 40-F ___

Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of
1934.

Yes ____              No  __X__

If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b):

N/A
___


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                                    Contents

     1.    Press release issued by CEMEX, S.A. de C.V. ("CEMEX") and RMC Group
           p.l.c. ("RMC"), dated February 15, 2005, announcing that the U.S.
           anti-trust authorities cleared the acquisition of RMC by CEMEX UK
           Limited, a wholly-owned subsidiary of CEMEX, under the applicable
           U.S. anti-trust legislation (attached hereto as exhibit 1).









                                   SIGNATURE


         Pursuant to the requirements of the Securities Exchange Act of 1934,
CEMEX, S.A. de C.V. has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.




                                                  CEMEX, S.A. de C.V.         
                                                 _____________________________
                                                  (Registrant)



Date:  February 15, 2005                      By: /s/ Rafael Garza            
     __________________________                  _____________________________
                                                  Name:  Rafael Garza
                                                  Title: Chief Comptroller







                                 EXHIBIT INDEX


EXHIBIT NO.          DESCRIPTION
-----------          -----------

1                    Press release issued by CEMEX, S.A. de C.V. ("CEMEX")
                     and RMC Group p.l.c. ("RMC"), dated February 15, 2005,
                     announcing that the U.S. anti-trust authorities cleared
                     the acquisition of RMC by CEMEX UK Limited, a wholly-owned
                     subsidiary of CEMEX, under the applicable U.S. anti-trust
                     legislation.