exv3w31wd

Exhibit 3.31(d)

APRIL 27,2010 CONCRETE ACQUISITION III, LLC CONCRETE ACQUISITION IV, LLC CONCRETE ACQUISITION V, LLC CONCRETE ACQUISITION VI, LLC UNANIMOUS WRITTEN CONSENT OF THE MEMBER The undersigned, being the sole member (the “Member”) of each of the Companies listed on Exhibit A attached hereto (each a “Company” and collectively the “Companies”), hereby takes the following actions and adopts the following resolutions by written consent pursuant to the Limited Liability Company Agreement of each Company (each an “Operating Agreement”) and Section 18-302 of the Delaware Limited Liability Company Act (as amended from time to time, the “DLLCA”): WHEREAS, it is deemed advisable and in the best interests of each Company that the Operating Agreement be amended; WHEREAS, the Member may amend each Company’s Operating Agreement in accordance with Article X of the Operating Agreement; RESOLVED, that the Operating Agreement is hereby amended by inserting the following provision: “Article XIII. Bankruptcy of the Member. Notwithstanding any other provision of this Agreement, the bankruptcy (as defined in Sectoion 18-101 of the DLLCA) of a Member or any other event set forth in Section 18-304 of the DLLCA shall not cause such member to cease to be a member of the Company and upon the occurrence of such an event, the Company shall continue without dissolution.” FURTHER RESOLVED, that all acts, actions and transactions relating to the matters contemplated by the foregoing resolutions done in the name of and on behalf of each Company, which acts would have been approved by the foregoing resolutions except that such acts were taken before these resolutions were certified, are hereby in all respects approved and ratified.