SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549
                                SCHEDULE TO
                               (RULE 14D-100)
               TENDER OFFER STATEMENT UNDER SECTION 14(d)(1)
        OR SECTION 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934.
                             (AMENDMENT NO. 1)


                     PUERTO RICAN CEMENT COMPANY, INC.
                     (Name of Subject Company (Issuer))


                         TRICEM ACQUISITION, CORP.,
                   an indirect wholly owned subsidiary of
                            CEMEX, S.A. de C.V.
                    (Names of Filing Persons (Offerors))
                  COMMON STOCK, PAR VALUE $1.00 PER SHARE
                       (Title of Class of Securities)

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

                                745075-10-1
                   (CUSIP Number of Class of Securities)

                             Ramiro Villarreal
                            CEMEX, S.A. de C.V.
                         Ave. Constitucion 444 Pte.
                    Monterrey, Nuevo Leon, Mexico 64000
                       Telephone: (011-528) 328-3000
                   (Name, address and telephone number of
                        person authorized to receive
                       notices and communications on
                         behalf of filing persons)

                                 Copies to:
                           Randall H. Doud, Esq.
                  Skadden, Arps, Slate, Meagher & Flom LLP
                             Four Times Square
                       New York, New York 10036-6522
                          Telephone: 212-735-3000

                         CALCULATION OF FILING FEE
==============================================================================

         Transaction Valuation*                     Amount of Filing Fee**

              $180,196,590                                $16,578.09
==============================================================================
*    For purposes of calculating amount of filing fee only. This amount
     assumes the purchase of all outstanding shares of common stock of
     Puerto Rican Cement Company, Inc. The amount of the filing fee
     calculated in accordance with Rule 0-11 of the Securities Exchange Act
     of 1934, as amended, equals $92 for every $1,000,000 of the
     transaction value.
**   Previously paid.

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

     Amount Previously Paid: N/A                Form or Registration No.: N/A
     Filing party: N/A                          Date Filed: N/A

     [_] Check the box if the filing relates solely to preliminary
         communications made before the commencement of a tender offer.

     Check the appropriate boxes below to designate any transactions to
     which the statement relates:

     [X] third-party tender offer subject to Rule 14d-1.
     [_] issuer tender offer subject to Rule 13e-4.
     [_] going-private transaction subject to Rule 13e-3.
     [_] amendment to Schedule 13D under Rule 13d-2.

     Check the following box if the filing is a final amendment reporting
the results of the tender offer: [_]



This Amendment No.1 to the Tender Offer Statement on Schedule TO (the
"Schedule TO"), filed initially with the Securities and Exchange Commission
on July 1, 2002, relates to the offer by Tricem Acquisition, Corp. (the
"Purchaser"), a Puerto Rico corporation and an indirect wholly owned
subsidiary of CEMEX, S.A. de C.V., a company organized under the laws of
the United Mexican States ("CEMEX"), to purchase all outstanding shares of
common stock of Puerto Rican Cement Company, Inc., a Puerto Rico
corporation (the "Company"), par value $1.00 per share (the "Shares"), at
U.S. $35.00 per share, net to the seller in cash, without interest thereon,
upon the terms and subject to the conditions set forth in the Offer to
Purchase, dated July 1, 2002 (the "Offer to Purchase"), and in the related
Letter of Transmittal (which, together with any amendments or supplements
thereto, constitute the "Offer"), which were filed as Exhibits (a)(1) and
(a)(2), respectively, to the Schedule TO. Unless otherwise defined herein,
all capitalized terms used herein shall have the respective meanings given
such terms in the Offer to Purchase.

Item 11. Additional Information.

         (a)-(b) Item 11 is hereby amended and supplemented to add the
following:

                  On July 8, 2002, CEMEX issued a press release in English
and Spanish, copies of which are attached hereto as Exhibits (a)(12) and
(a)(13), announcing that (A) the waiting period under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended, applicable to the purchase
of the Shares pursuant to the Offer was terminated early on July 3, 2002,
(B) the United States Nuclear Regulatory Commission had no regulatory
objection to the tender offer and (C) the Company had received the consents
under its or its subsidiaries' credit agreements with Banco Popular de
Puerto Rico required in connection with the tender offer.

Item 12. Exhibits.

       (a)(12) Press Release issued by CEMEX (English version) on July 8,
               2002.
       (a)(13) Press Release issued by CEMEX (Spanish version) on July 8, 2002.


                                 SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.

                                              Tricem Acquisition, Corp.


                                              By:  /s/ Jill  Simeone
                                                   ---------------------
                                                   Name:  Jill Simeone
                                                   Title: Assistant Secretary


                                              CEMEX, S.A. de C.V.


                                              By: /s/ Ramiro G. Villarreal
                                                  -------------------------
                                                  Name:  Ramiro G. Villarreal
                                                  Title: General Counsel


Dated: July 8, 2002


                               EXHIBIT INDEX

 Exhibit No.         Exhibit Name
 -----------         ------------

 (a)(12)             Press Release issued by CEMEX (English version) on
                     July 8, 2002.
 (a)(13)             Press Release issued by CEMEX (Spanish version) on
                     July 8, 2002.

Media Relations             Investor Relations          Analyst Relations
Daniel Perez Whitaker       Abraham Rodriguez           Jose Antonio Gonzalez
(52 81) 8152-2747           (52 81) 8328-3631           (212) 317-6017
daniel_pw@cemex.com         arodriguez@cemex.com        josegonzalez@cemex.com



             CEMEX, S.A. de C.V. ANNOUNCES EARLY TERMINATION OF
          HART-SCOTT-RODINO WAITING PERIOD AND RECEIPT OF CERTAIN
           CONSENTS REQUIRED IN CONNECTION WITH TENDER OFFER FOR
                     PUERTO RICAN CEMENT COMPANY, INC.

MONTERREY, MEXICO, AND SAN JUAN, PUERTO RICO, July 8, 2002 - CEMEX, S.A. de
C.V. ("CEMEX", NYSE: CX), through its subsidiary, Tricem Acquisition, Corp.
("Tricem"), announced today that on July 3, 2002, it was advised that the
waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended, applicable to the $35.00 per share cash tender offer for
all outstanding shares of common stock of Puerto Rican Cement Company, Inc.
("PRCC", NYSE: PRN), was terminated early. Accordingly, the condition to
the tender offer relating to the expiration or termination of the waiting
period under the Hart-Scott-Rodino Antitrust Improvements Act has been
satisfied.

In addition, CEMEX, through Tricem, also announced that it was advised
today by PRCC that it had been advised by the United States Nuclear
Regulatory Commission that it had no regulatory objection to the tender
offer and that it had received waivers or consents under certain of its or
its subsidiaries' credit agreements with Banco Popular de Puerto Rico
required in connection with the tender offer. Accordingly, the conditions
to the tender offer relating to these matters have been satisfied. The
tender offer continues to be subject to certain other conditions,
including, but not limited to, the valid tender of that number of PRCC
shares which represents a majority of PRCC's outstanding shares on a fully
diluted basis.

The tender offer and related withdrawal rights currently are scheduled to
expire on Monday, July 29, 2002, at 12:00 midnight, Eastern time, unless
the offer is extended.

Copies of the tender offer can be obtained from Georgeson Shareholder
Communications Inc., the information agent for the tender offer, at
1-800-616-5497. A copy of the tender offer also has been filed with the
U.S. Securities and Exchange Commission. Investors and security holders may
obtain a copy of the tender offer and related documents filed by CEMEX with
the Commission at www.sec.gov.

CEMEX is a leading global producer and marketer of cement and ready-mix
products, with operations concentrated in the world's most dynamic cement
markets across four continents. CEMEX combines a deep knowledge of the
local markets with its global network and information technology systems to
provide world-class products and services to its customers, from individual
homebuilders to large industrial contractors. For more information, visit
www.cemex.com.


This press release is for informational purposes only. The solicitation of
offers to buy PRCC shares will only be made pursuant to the offer to
purchase and related materials that Tricem will file and will send to PRCC
shareholders. This communication shall not constitute a solicitation of an
offer to purchase in any jurisdiction in which such offer, solicitation or
sale would be unlawful.



Media Relations              Investor Relations        Analyst Relations
Daniel Perez Whitaker        Abraham Rodriguez         Jose Antonio Gonzalez
(52 81) 8152-2747            (52 81) 8328-3631         (212) 317-6017
daniel_pw@cemex.com          arodriguez@cemex.com      josegonzalez@cemex.com




           CEMEX, S.A. de C.V. ANUNCIA LA TERMINACION ANTICIPADA DEL
          HART-SCOTT-RODINO PERIODO DE ESPERA Y EL RECIBO DE CIERTAS
     AUTORIZACIONES REQUERIDAS EN RELACION CON LA OFERTA PUBLICA DE COMPRA
               DE LA COMPANIA PUERTO RICAN CEMENT COMPANY, INC.

MONTERREY, MEXICO, Y SAN JUAN, PUERTO RICO, Julio 8, 2002 - CEMEX, S.A. de
C.V. ("CEMEX", NYSE: CX), a traves de su subsidiaria, Tricem Acquisition,
Corp. ("Tricem"), anuncio el dia de Hoy que en fecha Julio 3, 2002, fue
informado que el periodo de espera bajo el "Hart-Scott-Rodino Antitrust
Improvements Act" de 1976, junto con sus modificaciones, aplicable a la oferta
de U.S.$35.00 por accion en efectivo bajo la oferta publica de compra de la
totalidad de las acciones comunes del capital social de Puerto Rican Cement
Company, Inc. ("PRCC", NYSE: PRN), fue terminado anticipadamente. En
consecuencia, la condicion impuesta a la oferta publica de compra de acciones,
relativa a la expiracion o terminacion del periodo de espera bajo el
"Hart-Scott-Rodino Antitrust Improvements Act" ha sido satisfecha.

Adicionalmente, CEMEX a traves de Tricem, tambien anuncio que fue informada el
dia de Hoy por PRCC, que a su vez fue informada por la "United States Nuclear
Regulatory Commission" que dicha Comision no tenia ninguna objecion a la
oferta publica de compra de acciones y que habia recibido las autorizaciones o
consentimientos aplicables bajo ciertos contratos de credito de la compania, o
de sus subsidiarias, con Banco Popular de Puerto Rico, requeridos en relacion
con la oferta publica de compra de acciones. En consecuencia, las condiciones
establecidas a la oferta publica de compra de acciones en dichos rubros han
sido satisfechas. La oferta publica de compra de acciones continua sujeta a
ciertas otras condiciones, incluyendo entre otras, mas no limitada a, la
valida presentacion para su compra, del numero de acciones de PRCC
representativas de la mayoria de las acciones comunes, emitidas y pagadas de
PRCC, considerando la total dilucion de las mismas.

La oferta publica y los derechos relativos al retiro de acciones actualmente
estan programados para expirar el proximo dia Lunes, Julio 29, 2002, a las
12:00 de medianoche, tiempo de la Costa Este de E.U.A., a menos que la oferta
sea ampliada.

Copias de la oferta publica de compra de acciones pueden ser obtenidas de
Georgeson Shareholder Communications Inc., el agente de informacion para la
oferta publica de compra de acciones, en el 1-800-616-5497. Una copia de la
oferta publica de compra de acciones tambien ha sido registrada ante la U.S.
Securities and Exchange Commission. Inversionistas y tenedores de acciones
pueden obtener una copia de la oferta publica de compra de acciones y demas
materiales registrados por CEMEX ante la Comision en www.sec.gov.

CEMEX es una compania global lider en la produccion y distribucion de cemento,
con operaciones posicionadas primariamente en los mercados mas dinamicos del
mundo a traves de cuatro continentes. CEMEX combina un profundo conocimiento
de los mercados locales con su red mundial de operaciones y sistemas de
tecnologia informatica a fin de proveer productos y servicios de clase mundial
a sus clientes, desde constructores individuales hasta grandes contratistas
industriales. Para mayor informacion, visite www.cemex.com.


El presente comunicado se hace exclusivamente con propositos informativos. La
solicitud de oferta de compra de acciones de PRCC sera hecha unicamente a
traves y de conformidad con la oferta publica de compra de acciones y demas
materiales relacionados con la misma que Tricem registrara y enviara
directamente a los accionistas de PRCC. La presente comunicacion no
constituira una solicitud de oferta de compra de acciones en cualquier
jurisdiccion en la que tal oferta, solicitud o venta de acciones pudiese
constituir un acto ilegal.