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farther than visible effectiveness of machine. Place vibrators to rapidly <br />penetrate placed layer and at least 6" into preceding layer. Do not <br />insert vibrators into lower layers of concrete that have begun to set. At <br />each insertion limit duration of vibration to time necessary to consolidate <br />concrete without causing segregation of mix. <br />7) Consolidate concrete during placing operations so that concrete is <br />ithoroughly worked around reinforcement and other embedded items <br />and into corners. <br />8) Maintain reinforcing in proper position during concrete placement <br />operations. <br />H. CONCRETE CURING AND PROTECTION: <br />1) General: Protect freshly placed concrete from premature drying and <br />excessive cold or hot temperatures. <br />2) Apply specified curing and sealing compound to concrete as soon as <br />final finishing operations are complete (within 2 hours). Apply uniformly <br />in continuous operation by power -spray or roller in accordance with <br />manufacturer's directions. Re -coat areas subjected to heavy rainfall <br />within 3 hours after initial application. Maintain continuity of coating and <br />repair damage during curing period. <br />I. QUALITY CONTROL TESTING DURING CONSTRUCTION: <br />Sampling Fresh Concrete: ASTM C 172 except modified for slump to <br />comply with ASTM C94. <br />Slump: ASTM C 143; one test at point of discharge for each set of cylinders <br />made for each type of concrete; additional test when concrete consistency <br />' seems to have changed. When using super plastercizer admixture, slump <br />each load before induction of admixture. <br />I I <br />TS -15 <br />ARJC10&'=SUNNY ISLESRECHSPECS <br />