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section 4.2 through 4. 8 (excluding section 4. 6), or other pre-approved methods so as to produce <br /> a workable concrete having the properties of strength, slump and air content set out elsewhere <br /> in the Contract Documents. No materials or mixes not currently approved shall be submitted by <br /> the Contractor for use in this project. <br /> B . Portland Cement <br /> The cement used to manufacture concrete shall comply with Florida D. O.T . Standard <br /> Specifications for Road and Bridge Construction, 206 Edition, Section 921 . The cement used to <br /> manufacture concrete shall conform to AASHTO M 85 or M 240. If requested by the Engineer, <br /> the cement supplier shall submit a certification that the cement used on the project conforms <br /> to the applicable specifications with complete mill analysis for every 200 tons used. <br /> C . Aggregate <br /> Aggregate shall conform to ASTM-C-33, or to Florida D. O .T. Standard Specifications for Road <br /> and Bridge Construction, 2006 Edition, Section 901 and 902. <br /> D. Admixtures <br /> Air entraining admixtures shall conform to ASTM-C-260. Type A water reducing admixtures <br /> (normal setting) shall conform to ASTM-C-494. Type D water reducing admixtures (retarders) <br /> shall conform to ASTM-C494. Type E water reducing admixtures (accelerating) shall conform <br /> to ASTM-C-494. Fly ash shall conform to ASTM-C-618 Type F with the following restriction : <br /> Sulfur trioxide shall not exceed 5 .0 percent, and loss of ignition shall not exceed 5 .0 percent. <br /> E. Water <br /> Water shall conform to Florida D. O .T. Standard Specifications for Road and Bridge <br /> Construction, 206 Edition, Section 923 . If the water is of questionable quality, it shall be tested <br /> in accordance with AASHTO-T-26, " Standard Method of Test for Quality of Water to be <br /> Used in Concrete" . <br /> F . Pozzolans and Slag <br /> Pozzolans and Slag shall conform to the Florida D .O.T. Standard Specifications for <br /> Road and Bridge Construction, 2006 Edition, Section 929 . <br /> G . Concrete Strength <br /> Concrete shall meet the minimum compressive strength (f,, in psi) as indicated in the Contract <br /> Documents at 28 days. Conformance to strength requirements shall be determined by ACI <br /> Standard 318 -77, sections 4. 8 .2.3 and 4. 8 .3 . <br /> H. Air Content <br /> The amount of air entrainment shall be between 3 and 6 percent. <br /> 1. Slump <br /> The mixture shall contain no more water than is necessary to produce concrete which is <br /> workable and plastic . Water added at the batch plant and at the job site together shall not exceed <br /> 02752 - Concrete Paving <br /> 02752- 3 <br />