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SECTION 03305 <br /> PORTLAND CEMENT CONCRETE <br /> PART 1- GENERAL <br /> 1.01 DESCRIPTION <br /> A. This Section specifies normal Portland cement concrete, including materials, <br /> proportioning, batching, mixing, delivering and testing. <br /> B. Portland cement concrete shall be composed of Portland cement, fine aggregate, <br /> coarse aggregate,and water,with admixtures as approved, proportioned and mixed <br /> as specified herein. <br /> C. Classes of Concrete: <br /> 1. Classes of concrete are designated by a numeral indicating the minimum <br /> 28-day compressive strength in pounds per square inch as determined by <br /> ASTM C39. <br /> 2. Each class of concrete may consist of one or more mixes determined by the <br /> maximum size and type of aggregate, cement factor and types of admixtures <br /> or special aggregates used. Types shall not be varied within a given <br /> structural element. <br /> 3. Each mix within a class will require approval of the design mix prior to use. <br /> 1.02 DESIGN CRITERIA: <br /> A. Normal Portland Cement Concrete: <br /> 1. General requirements: <br /> a. Concrete mixes shall have a minimum water content per cubic yard <br /> of concrete consistent with required slump, a cement content <br /> corresponding to the 03305-1 appropriate water-cement ratio, the <br /> Specified maximum size of coarse aggregate, and the required <br /> percentage of fine aggregate. Design mixes shall be as <br /> recommended by ACI 211.1 and ACI-301 for normal weight <br /> concrete. However following limits shall govern the concrete mix <br /> design over and above ACI requirements. <br /> b. Air entrainment - 4 + 1 % - use vinsol resin type air-entraining <br /> Agents. The design mixes for each class of concrete used shall be <br /> as determined by the Contractor through an approved design <br /> 08/12 03305-1 11-4179 <br />