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ROOFING REPLACEMENT, RECOVER AND REPAIR PROJECT PAGE 5 <br />INDIAN RIVER COUNTY - JAIL COMPLEX SECTION 035216 <br />JANUARY 4, 2018 LIGHTWEIGHT CONCRETE <br />C. Deposit and screed lightweight insulating concrete in a continuous operation until an <br />entire panel or section of roof area is completed. Do not vibrate or work mix except for <br />screeding or floating. Place to depths and slopes indicated. <br />D. Finish top surface smooth, free 'of ridges and depressions, and maintain surface in <br />condition to receive subsequent roofing system. <br />E. Begin curing operations immediately after placement, and air cure for not less than <br />three days, according to manufacturer's written instructions. <br />F. If ambient temperature falls below 32 deg F (0 deg C), protect lightweight insulating <br />concrete from freezing and maintain temperature recommended by manufacturer for <br />72 hours after placement. <br />3.3 FIELD QUALITY CONTROL <br />A. Testing Agency: Engage a qualified testing /agency to sample materials and perform <br />tests and inspections. <br />B. Testing of samples of lightweight insulating concrete obtained according to <br />ASTM C 172/C 172M, except as modified by ASTM C 495, shall be performed <br />according to the following requirements: <br />1. Determine as -cast unit weight during each hour of placement, according to <br />ASTM C 138/C 138M. <br />2. . Determine oven -dry unit weight and compressive strength according to <br />ASTM C 495. Make a set of at least six molds for each day's placement, but not <br />less than one set of molds for each 5000 sq. ft. (465 sq. m) of roof area. <br />3. Perform additional tests when test results indicate that as -cast unit weight, oven - <br />dry unit weight, compressive strength, or other requirements have not been met. <br />a. Retest cast -in-place lightweight insulating concrete for oven -dry unit weight <br />and compressive strength. <br />C. Prepare test and inspection reports. <br />END OF SECTION 035216 <br />