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C-1 <br />i <br />0 <br />SECTION A - RE1NF©RCED CONCRETE <br />L SCOPE <br />Y ' <br />A. The workcovered under this section shall include, but not be limited <br />to, concrete manholes, inlets, catch basins, curb, curb and gutter, street <br />repair, and sidewalks. It shall include all materials, equipment, labor, <br />finishing, form work and curing. <br />2. GENERAL <br />A. The concrete shall be a workable plastic mix composed of portland <br />cement, fine aggregate, coarse aggregate, air and water proportioned <br />and mixed to provide the strength of concrete called for upon the Plans. <br />The water -cement ratio shall be kept to the minimum necessary to <br />achieve proper placing and finishing. Any item relative to concrete or <br />reinforcing under this item that is not covered herein, shall be in <br />accordance with the ACI 318-71 Building Code and the Design and <br />Control of Concrete Mixtures by Portland Cement Association, <br />B. Concrete mixing may be done in a portable mixer, a transit- mix truck, <br />or if less than five cubic feet, in a mortar box; provided al] ingredients <br />including water are accurately measured by weight or volume. <br />Measurement by the "shovel full" is specifically prohibited. No mixer <br />shall be loaded above its rated mixing capacity. <br />C. Transit mix trucks shall not wash out their tracks on the site without <br />the specific permission of the Engineer and any waste concrete shall be <br />removed to a public dump. <br />3, CEMENT <br />A. Cement shall be portland cement conforming to ASTM C150 types I. IA., <br />III and/or IIIA. Cement, if delivered to site, shall be in unbroken paper <br />bags plainly marked with the manufactures name, the brand name, the <br />type of cement, and the weight of cement in the bag. All cement shall <br />be properly protected against dampness. Bags containing caked cement <br />shall be rejected. Cement shall be used in the same order as received, that <br />is first in, first out. <br />4. AGGREGATES <br />A. Aggregates shall conform to the 1996 Florida Department of <br />Transportation Specifications for Road and Bridge Construction. <br />Stockpiling of aggregates shall be done in such a manner as to prevent <br />segregation or contamination. <br />5. AIR ENTRAINMENT <br />A. Air entrainment is required and shall be maintained between 3 and 6 <br />percent considered as an optimum. Concrete showing more than 6 <br />percent may be rejected. IL <br />AAA ' <br />U <br />