Exhibit 4.17.1


                                AMENDMENT NO. 1

                            TO AMENDED AND RESTATED
                      LIMITED LIABILITY COMPANY AGREEMENT

         AMENDMENT NO. 1 TO AMENDED AND RESTATED LIMITED LIABILITY COMPANY
AGREEMENT OF CEMEX SOUTHEAST, LLC, a Delaware limited liability company
("Company"), effective as of September 1, 2005 (this "Amendment"), by and
between Company, CEMEX SOUTHEAST HOLDINGS, LLC, a Delaware limited liability
company ("Cemex"), READY MIX USA, INC., an Alabama corporation ("RMUSA"), and
solely for the purposes set forth in Section 9.6 thereof, CEMEX, INC., a
Louisiana corporation. Capitalized terms used herein but not otherwise defined
shall have the meaning ascribed to such terms in the LLC Agreement (as defined
below).

                                  WITNESSETH:

         WHEREAS, the Company, Cemex and RMUSA desire to amend the Amended and
Restated Limited Liability Company Agreement of the Company, effective as of
July 1, 2005 (the "LLC Agreement");

         WHEREAS, Ready Mix USA, LLC, a Delaware limited liability company and
an Affiliate of RMUSA ("Ready Mix LLC"), and RMC Mid-Atlantic, LLC, a South
Carolina limited liability company and an Affiliate of Cemex ("RMC"), have
entered into an Asset Purchase Agreement, dated September 1, 2005 (the "Asset
Purchase Agreement"), whereby (a) Ready Mix LLC will purchase from RMC, and RMC
will assign and delegate to Ready Mix LLC, certain assets and liabilities of
RMC in accordance with the terms of the Asset Purchase Agreement and (b) Ready
Mix LLC will be indemnified;

         WHEREAS, Section 8.2(b)(x) of the LLC Agreement provides that the LLC
Agreement may be amended with prior Board approval, which approval has been
granted by the Board; and

         WHEREAS, the Company, Cemex and RMUSA have agreed to amend certain
provisions of the LLC Agreement on the terms and conditions set forth in this
Amendment.

         NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements contained in the LLC Agreement and this Amendment, the
receipt, adequacy and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the Company, Cemex and RMUSA hereby agree
as follows:



                                   ARTICLE I

                   AMENDMENTS, ACKNOWLEDGEMENT AND COVENANTS

         SECTION 1.1 Amendments to Section 3.2

         (a) Section 3.2 of the LLC Agreement is amended to include a
definition of the "Asset Purchase Agreement" as follows:

                           "Asset Purchase Agreement" means that certain Asset
         Purchase Agreement entered by and between Ready Mix LLC and RMC
         Mid-Atlantic, LLC, a South Carolina limited liability company and an
         Affiliate of Cemex, dated September 1, 2005.

         SECTION 1.2 Amendments to Section 21

         (a) Section 21.1 of the LLC Agreement is amended and restated in its
entirety to read as follows:

                           21.1 Notwithstanding anything in this LLC Agreement
         to the contrary, each of Cemex and RMUSA hereby agrees (and any
         Permitted Transferee of either of the foregoing shall agree) that any
         Damages for which it or any of its Affiliates (the "Indemnifying
         Party") owes the other party (or its Affiliates) or the Company or
         Cemex Southeast LLC (the "Indemnified Party") an indemnification
         obligation under the Contribution Agreement, the Cemex Contribution
         Agreement or the Asset Purchase Agreement shall be paid from any
         distributions that otherwise would be paid by the Company to the
         Indemnifying Party and its Affiliates pursuant to Section 6.1 or
         otherwise, and each party hereby irrevocably waives all rights and
         title it would otherwise have to, and irrevocably instructs the
         Manager to pay to the Indemnified Party, all distributions that
         otherwise would be paid by the Company to the Indemnifying Party and
         its Affiliates under this LLC Agreement, until all such Damages have
         been paid in full to the Indemnified Party. For purposes of this
         Section 21.1, each party acknowledges that to the extent any
         distributions are paid to the Indemnified Party under Section 21.1 of
         the Ready Mix LLC Agreement in respect of a particular indemnification
         claim, such payments will also reduce the amount of such Damages. In
         the event of multiple claims, the distributions shall be applied
         against such claims in the order in which the amount of the
         indemnification obligation in respect thereof is finally determined.
         Notwithstanding anything in this LLC Agreement to the contrary, in no
         event shall any amount of damages withheld by the Company under this
         Section 21.1 as a payment of indemnified Damages incurred by the
         Company be treated as (i) EBITDA for purposes of (x) calculating the
         amount of any required distribution (including pursuant to Section
         6.1) or (y) determining the Purchase Price or the Buyout Purchase
         Price, or (ii) available cash for purposes of determining the amount
         of any distribution under Section 9.6.4(a). The parties acknowledge
         and agree that in the event RMC Mid-Atlantic, LLC is no longer an
         Affiliate of Cemex such change in status shall not affect the
         obligations under this Section 21.1 and any Damages for which RMC
         Mid-Atlantic, LLC owes Ready Mix LLC (or its Affiliates) an
         indemnification obligation under the Asset Purchase Agreement shall be
         paid as provided in this Section 21.1 as if RMC Mid-Atlantic, LLC
         remained an Affiliate of Cemex. For purposes of this Section 21, none
         of Cemex, RMUSA or any of their respective Affiliates shall be deemed
         to be Affiliates of the Company or any of its Subsidiaries or Ready
         Mix LLC or any of its Subsidiaries.

         SECTION 1.3 Amendments to Exhibit A

         (a) The first column of Exhibit A of the LLC Agreement titled "Member
Name and Mailing Address" is amended and restated in its entirety to read as
follows:

                           CEMEX SOUTHEAST HOLDINGS LLC
                           840 Gessner, Suite 1400
                           Houston, TX 77024
                           Attn: Leslie White
                           Fax: (713) 722-5110

                           READY MIX USA, INC.
                           1300 McFarland Blvd NE
                           Tuscaloosa, AL 35406
                           Attn: Scott Phelps
                           Fax: (205) 345-5772


                                  ARTICLE II

                                REPRESENTATIONS

         Each of Company, Cemex and RMUSA hereby represents to the other that
(a) it has full organizational power and authority to execute and deliver this
Amendment and to consummate the transactions contemplated hereby, (b) the
execution and delivery of this Amendment by such party have been duly and
validly authorized by all necessary corporate action on the part of such party
and (c) this Amendment has been duly and validly executed and delivered by such
party and constitutes a valid and binding obligation of such party, enforceable
against such party in accordance with its terms, except that such
enforceability (i) may be limited by bankruptcy, insolvency, moratorium or
other similar laws affecting or relating to the enforcement of creditors'
rights generally and (ii) is subject to general principles of equity and the
discretion of the court before which any proceedings seeking injunctive relief
or specific performance may be brought.


                                  ARTICLE III

                                 MISCELLANEOUS

         SECTION 3.1 Headings. The headings contained in this Amendment are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Amendment.

         SECTION 3.2 Counterparts. This Amendment may be executed in two or
more counterparts, each of which when executed shall be deemed to be an
original but all of which shall constitute one and the same agreement.

         SECTION 3.3 Governing Law. This Amendment shall be governed, construed
and enforced in accordance with the Laws of the State of Delaware without
giving effect to the principles of conflicts of law thereof.

         SECTION 3.4 No Other Effect on the LLC Agreement. Except as modified
by this Amendment, all of the terms of the LLC Agreement are hereby ratified
and confirmed and shall remain in full force and effect.





         IN WITNESS WHEREOF, Company, Cemex and RMUSA have caused this
Amendment to be signed by their respective officers thereunto duly authorized
as of the date first written above.

                                            CEMEX SOUTHEAST LLC


                                            By:  /s/ Gilberto Perez
                                                ------------------------------
                                            Name:  Gilberto Perez
                                            Title: President




                                            READY MIX USA, INC.


                                            By:  /s/ Marc Bryant Tyson
                                                ------------------------------
                                                Marc Bryant Tyson
                                                Its President




                                            CEMEX SOUTHEAST HOLDINGS LLC


                                            By:  /s/ Gilberto Perez
                                                ------------------------------
                                                Name:  Gilberto Perez
                                                Title: President