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1. Deliver to the mixing site in original, sealed packages, labeled with the <br /> weight, name of manufacturer, branch and type specified. Store packages in <br /> water tight enclosures. <br /> 2. Do not deliver packages varying more than three percent from the specified <br /> weight. <br /> 3. Do not use different types or brands of cement, or the same type or brand of <br /> cement from difference sources, without approval. <br /> C. Bulk Cement: <br /> 1. Store separately from packaged cement and provide protection to prevent <br /> deterioration from exposure to moisture and intrusion of foreign matter. <br /> 2. Provide facilities for sampling at the weighing hopper or in the feed line <br /> immediately before entering the hopper. <br /> 3. Do not use different types or brands of cement,or the same type or brand of <br /> cement from difference sources, without approval. <br /> PART 2 - PRODUCTS <br /> 2.01 MATERIALS: <br /> A. Portland Cement: ASTM C150; Type I, II or III. <br /> B. Admixtures and Additives: <br /> 1. Air-entraining admixtures: ASTM C260. <br /> 2. Chemical admixtures for concrete: ASTM C494, Type D. <br /> 3. Calcium chloride: The use of calcium chloride is prohibited. <br /> 4. Superplasticizers: ASTM C494. Type of super plasticizer to be <br /> recommended by the concrete manufacturer and approved by the Engineer. <br /> C. Water: Potable, from city water supplies or other sources, which are approved by a <br /> public health department. <br /> D. Concrete Aggregate: <br /> 1. The stone shall comply with the soundness requirements of A.S.T.M. C33. <br /> Soundness Tests should be made at the option of the Engineer. <br /> 2. Coarse aggregate gradation: Aggregate size 57 in accordance with <br /> 08/12 03305-6 11-4179 <br />