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C. Provide temporary protection of removable waterproof covering to prevent direct exposure to moisture <br /> if flooring application is not started immediately after completion of curing. <br /> D. Drying: Contractor shall provide continuous ventilation ands adequate heat to rapidly remove <br /> moisture from the area until the cementitious underlayment is dry as described below. Contractor shall <br /> provide mechanical ventilation if necessary. To test for dryness,tape a 24"by 24"section of flexible vinyl <br /> plastic to the surface of the underlayment. If no condensation occurs after 48 hours,the underlayment shall <br /> be considered dry. Perform dryness test 5-7 days after pour and as required. <br /> 3.3 FIELD QUALITY CONTROL <br /> A. Slump Test: One slump test shall be made using a 2"by 4"cylinder. The acceptable slump is a <br /> patty size of 8-9 inches in diameter. <br /> B. Owner may engage an independent testing laboratory to talce samples and conduct tests to <br /> evaluate the lightweight insulating concrete if the Architect believes the material should be tested. <br /> C. Report test results to Architect and lightweight insulating concrete producer within 24 hours of <br /> completion of each test. <br /> D. Compressive strength:At least one set of 3 molded cube samples shall be taken during the <br /> underlayment installation. <br /> 1. Cubes shall be talcen and tested in accordance with ASTM C472.Tests shall be made available <br /> to the Architect upon request. <br /> 3.4 CLEANING AND PROTECTION <br /> A. Foot Traffic:Light foot traffic is permitted 2-3 hours after final screeding of LEVELROCK <br /> underlayment.Heavy foot traffic shall be delayed until 12 hours after LEVELROCK is installed. <br /> B. Protection from heavy loads:During construction place temporary wood planking(plywood)where <br /> ever it is subject to hea.vy wheeled or concentrated loads. <br /> 3.5 DEFECTIVE WORK <br /> A. General: Refinish,or remove and replace lightweight insulating concrete surfaces that are too rough <br /> to receive finish flooring,or where physical properties do not meet specified requirements,as determined by <br /> Architect. <br /> END OF SECTION 03520 <br /> INSULATIIVG LIGHTWEIGHT CONCRETE <br /> Page 3 of 3 <br />