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1.04 DESCRIPTION A. Concrete shall be of Portland cement, ASTM C -94, fine aggregate, coarse aggregate, water ' and admixtures as specified and shall be ready- mixed, or transit -mixed concrete. All constituents, including admixture, shall be batched at the central batch plant. ' B. Reinforced concrete shall conform to ACI Specification 318 -89 or latest revision. C. Field testing and inspection services required will be provided by the Contractor. Cost of such work, except as specifically stated otherwise, will be paid for by the Contractor. Methods of test will comply in detail with the latest applicable ASTM Methods of Testing. D. Samples of constituents and of concrete as placed will be subjected to laboratory tests. ' Materials incorporated in the work shall conform to approved samples. E. Under special circumstances, the Engineer may allow minor deviations from the material requirements specified, provided the resulting concrete quality is not adversely affected or provided a suitable adjustment in cement content is made to compensate for such deviations without cost to the Owner. 1.05 SUBMITTALS A. Submit, as provided in the General Conditions and Section 01340, shop drawings showing placement of forms, form joints, major inserts and blockouts. 1.06 QUALITY ASSURANCE ' A. The actual acceptance of aggregates and development of mix proportions to produce concrete conforming to the specific requirements shall be determined by means of prior laboratory tests made by the Concrete Supplier or the Contractor at his expense with the constituents to be used on the work. B. The Concrete Supplier shall submit through the Contractor to the Engineer for approval the concrete mix he intends to use, designed within the limits of these specifications, listing the brand of cement, source and results of tests of aggregates and admixtures not later than 14 days prior to the beginning of placing concrete. 1 C. The limiting strengths, water- cement ratios and cement factors as shown on (Table A) shall apply. Maximum water - cement ( # / #) for structures shall be 0.53 by weight. ' TABLE A Minimum Maximum Net Minimum Comp. Str. Water Content Cement Factor ' psi at 28 days gals /100 lbs* 100 Ibs /cu yd ** 2500 7.4 4.3 ' 3000 7.0 4.8 3500 6.4 5.64 4000 5.85 5.64 *Maximum; decrease if possible. This represents total water in mix at time of mixing, including free water on aggregates, and water in admixture solution. ' * *Minimum; increase as necessary to meet other requirements. These cement factors apply to "controlled" concrete subject to specific inspection. 06/05 03300 -2 03- 4138.B I