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BOEING I'UEL DOCK TRENCH DRAIN JULY 1994 <br /> A. Proportion mixes complying with mix design procedures specified in ACI 301. <br /> 1. Submit written report to Architect for cach proposed concmte mix at least IS <br /> days prior to stert of work. Do not begin concrete production until mixes <br /> have been reviewed and are acceptable to Engineer. <br /> 2. Mix designs may be adjusted when material characteristics,job conditions. <br /> weather, test resulu, or other circumstances warrant. Do not use revised <br /> conctete mixes until submitted to and accepted by Engineet. <br /> 3. Use air-entering admixture in all wncrete, providing not less than 4 percent <br /> nor more than 6 percent entrained air for concrete cxposed to freezing and <br /> thawing, and from 2 percent to 4 percent for other concrete. <br /> 4. Compressive Strength: 4000 psi, minimum at 28 days, unless otherwise <br /> I indicated. <br /> � 5. Slump Range: 4 inches. <br /> PART 2 - PRUDUCTS <br /> 2.1 CONCRETE MATER[ALS: <br /> A. Portlend Cement: ASTM C 150, type as reqwrcd. <br /> B. Aggtegates: ASTM C 33, except local aggregates of proven durability may be used <br /> when acceptable to Architect. <br /> C. Water. Drinkable. <br /> D. Air-Entraining Admixture: ASTM C 260. <br /> E. Water-Reducing Admixture: ASTM C 494; type az required to suit project <br /> wnditions. Use only admixtures that have been tated and accepted in mix designs. <br /> F. )oint Fillers: Sce Division 7. <br /> 2.2 FORM MATEltIALS: <br /> A. Provide form materials with sufficient stability to withstand pressure of����.:.�.�I <br /> concrete without bow ar deticetion. � <br /> B. Exposed Concrote Surfaces: Suitabie material to suit project conditions. <br /> 2.3 REiNFORCING MATERIALS: <br /> A. Defortned Reinforcing Bars: ASTM A 615, Grade 60, unless otherwise indicated. <br /> 2.4 MANHOLE STEPS <br /> CAST-IN-PLACE CONCRETE 03300 - 2 <br />