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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: October 26, 2004


                              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"), dated October 25, 2004, announcing that RMC Group p.l.c. ("RMC") posted to its shareholders the scheme of arrangement document relating to the recommended acquisition of RMC by CEMEX UK Limited, a wholly-owned subsidiary of CEMEX (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: October 26, 2004 By: /s/ Ramiro Villarreal ---------------------------------- Name: Ramiro Villarreal Title: General Counsel

EXHIBIT INDEX EXHIBIT NO. DESCRIPTION - ----------- ----------- 1 Press release issued by CEMEX, S.A. de C.V. ("CEMEX"), dated October 25, 2004, announcing that RMC Group p.l.c. ("RMC") posted to its shareholders the scheme of arrangement document relating to the recommended acquisition of RMC by CEMEX UK Limited, a wholly-owned subsidiary of CEMEX.

                                                                     EXHIBIT 1


RMC Group p.l.c. and CEMEX, S.A. de C.V.

25 October 2004



         NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN, INTO OR FROM
                          AUSTRALIA, CANADA OR JAPAN



                             FOR IMMEDIATE RELEASE



                               RMC GROUP p.l.c.



         RECOMMENDED ACQUISITION BY CEMEX UK LIMITED, A SUBSIDIARY OF
                              CEMEX, S.A. de C.V.



                          POSTING OF SCHEME DOCUMENT



RMC and CEMEX announce that RMC has today posted to Shareholders the Scheme
Document relating to the recommended acquisition by CEMEX UK of RMC.

The Acquisition is being implemented by way of a scheme of arrangement under
section 425 of the Companies Act 1985. The Court Meeting and the Extraordinary
General Meeting of RMC Shareholders to approve the Scheme will be held on 17
November 2004. Subject to the receipt of regulatory clearances, it is expected
that the Scheme will become effective on 12 January 2005.

Terms defined in the recommended acquisition announcement issued by RMC and
CEMEX dated 27 September 2004 have the same meaning in this announcement.

Enquiries:

RMC                                                  Tel: +44 (0) 1932 568 833
Gary Rawlinson (Investor Relations)
Tim Stokes (Media Relations)


Cazenove                                             JPMorgan
(Financial Adviser and Corporate Broker to RMC)      (Financial Adviser to RMC)
Tel: +44 (0) 20 7588 2828
Nick Wiles                                           Tel: +44 (0) 20 7742 4000
Piers Coombs                                         Robert McGuire
Roger Clarke                                         Henry Lloyd
                                                     Eamon Brabazon

ABN Amro Hoare Govett                                Tel: +44 (0) 20 7601 0101
(Corporate Broker to RMC)
Peter Meinertzhagen
Chris Zeal

Citigate Dewe Rogerson                               Tel: +44 (0) 20 7638 9571
(PR Adviser to RMC)
Jonathan Clare
Michael Berkeley

CEMEX

Javier Trevino (Media Relations)                     Tel: +44 (0) 20 7379 5151
Maher Al-Haffar (Investor Relations)                 Tel: +1 212 317 6006

Goldman Sachs International                          Citigroup

(Financial Adviser and Corporate Broker              (Financial Adviser and
to CEMEX and CEMEX UK)                               Corporate Broker to CEMEX
Tel: +44 (0) 20 7774 1000                            and CEMEX UK)
Simon Dingemans                                      Tel: +44 (0) 20 7986 4000
Basil Geoghegan                                      Philip Robert-Tissot
                                                     Cyrus Shabi
                                                     Jan Skarbek

The Maitland Consultancy                             Tel: +44 (0) 20 7379 5151

(PR Adviser to CEMEX and CEMEX UK)
Angus Maitland
Philip Gawith


The directors of RMC accept responsibility for the information contained in
this announcement and confirm that, to the best of their knowledge and belief
(having taken all reasonable care to ensure that such is the case), the
information contained in this announcement is in accordance with the facts and
does not omit anything likely to affect the import of such information.

The directors of CEMEX UK and the directors of CEMEX accept responsibility for
the information contained in this announcement relating to CEMEX UK and CEMEX.
To the best of the knowledge and belief of the directors of CEMEX UK and the
directors of CEMEX (who have taken all reasonable care to ensure that such is
the case), the information contained in this announcement for which they are
responsible is in accordance with the facts and does not omit anything likely
to affect the import of such information.

Cazenove, which is regulated by the Financial Services Authority, is acting as
financial adviser and corporate broker to RMC in connection with the
Acquisition and no one else and will not be responsible to anyone other than
RMC for providing the protections afforded to customers of Cazenove or for
providing advice in relation to the Acquisition, or the contents of this
announcement.

JPMorgan, which is regulated by the Financial Services Authority, is acting as
financial adviser to RMC in connection with the Acquisition and no one else
and will not be responsible to anyone other than RMC for providing the
protections afforded to customers of JPMorgan or for providing advice in
relation to the Acquisition, or the contents of this announcement.

Hoare Govett, which is regulated by the Financial Services Authority, is
acting as corporate broker to RMC in connection with the Acquisition and no
one else and will not be responsible to anyone other than RMC for providing
the protections afforded to customers of Hoare Govett or for providing advice
in relation to the Acquisition, or the contents of this announcement.

Citigroup and Goldman Sachs International, which are regulated by the
Financial Services Authority, are acting as financial advisers and corporate
brokers to CEMEX and CEMEX UK in connection with the Acquisition and no one
else and will not be responsible to anyone other than CEMEX and CEMEX UK for
providing the protections afforded to their respective customers or for
providing advice in relation to the Acquisition, or the contents of this
announcement.