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3,500 psi compressive strength At 28 calendar days after casting (ASTM C 39) <br />(f ~)• <br />Volume stability. Length change between +/- 0.05 percent (ASTM C <br />157). <br />Minimize the volume of water used. <br />Minimal entrained air. 2 to 4 percent air. <br />Minimum water/cement ratio. Use appropriate admixtures to achieve the minimum <br />water/cement ratio. <br />Minimal evolution of heat of Minimize the Portland cement content by maximizing <br />hydration. the fly ash replacement while also achieving the <br />required strength. <br />The Contractor shall provide certified copies of test data from an approved laboratory <br />demonstrating compliance with the above target properties. <br />PART 3 -EXECUTION <br />3.1 General <br />The Contractor shall provide all labor, materials, equipment and tools necessary to design, <br />mix and test mass concrete as called for in these specifications. All work shall be <br />according to the Standard References in Paragraph 1.3 of this Section., <br />3.2 Quality Control <br />The Contractor shall employ a qualified Testing Facility approved by the Engineer <br />throughout the concrete design and testing process and shall ensure that accurate records <br />are kept of the various potential mix designs and test results. See Paragraph 1.4 of this <br />Section for the required tests and submittals. <br />End of section. <br /> <br />03300-6 <br />