Laserfiche WebLink
I <br /> I <br /> 2" 2.5 - 5.5 <br /> 1" 6.5 <br /> I3/4" 4.0 - 8.0 <br /> 1.07 ACCEPTANCE TESTS <br /> 1 A. Conformity of aggregates to these Specification, and the actual proportions of <br /> cement, aggregates, and water necessary to produce concrete conforming to the <br /> I requirements set forth in Table A, shall be determined by tests made with <br /> representative samples of the materials to be used on the work. Tests will be <br /> made by an accredited testing laboratory, and approved by the Engineer. <br /> I B. Cement may be subject to testing to determine that it conforms to the <br /> requirements of this Specification. Methods of testing shall conform to the <br /> appropriate specification, but the place, time, frequency and method of sampling <br /> Iwill be determined by the Engineer in accordance with the particular need. <br /> C. Water content of the concrete shall be based on a curve showing the relation <br /> between water content and 7 and 28-day compressive strengths of concrete made <br /> I using the proposed materials. The curves shall be determined by four or more <br /> points, each representing an average value of at least three test specimens at <br /> each age, and shall have a range of values sufficient to yield the desired data, <br /> I including all the compressive strengths called for on the Drawings, without <br /> extrapolation. The water content of the concrete to be used, as determined from <br /> the curve, shall correspond to the test strengths of the laboratory trial mixtures as <br /> Ishown on (Table D) below. <br /> TABLE D <br /> I Design Min. Lab. Strength <br /> Strength 7 Days' 28 Days** <br /> I 3000 <br /> 3500 2500 3500 <br /> 3000 4100 <br /> 4000 3500 4600 <br /> I * May be employed by preliminary design. <br /> ** To be used for final designs. <br /> IE. In no case, however, shall the resulting mix conflict with the limiting values for <br /> maximum water-cement ratios and minimum cement contents as specified in Table <br /> 1 A. <br /> PART 2 - PRODUCTS <br /> I2.01 MATERIALS <br /> A. Materials shall conform to these Specifications and any state or local specification <br /> Irequirements. <br /> B. Cement for all cast in place concrete shall be a domestic portland cement (ASTM <br /> I C-150, Type II) or high early strength portland cement (Type Ill) free from injurious <br /> water soluble salts or alkalies. High early strength cement may only be used, with <br /> I05/08 03300-4 05-4893 <br />