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� <br /> � <br /> .�f?er `loating, be�in f;rst trowe! finish ooeration usin� a power-driven trowel. 3e�in � <br /> final trowe ling w hen surface p�oduces a ringing sound as trowel is moved over surface. <br /> Consolidate concrete surface by final hand-trowelin� operation, free of trowe! marks, ' <br /> uniform in texture and appearance, and with a surface a level sucface plane so that <br /> despression between high spots do not exceed 1/2" under a 10' straiqhtedge. Grind � <br /> smooth surface defects which would telegraph through applied floor covering system. , <br /> � 3.0� CONCRETE CURING AND PROTECTION: <br /> General: Protect freshly placed concrete from premature drying and excessive cold or , <br /> hot temperatures. <br /> Start initial curing as soon as free water has disappeaced fcom concrete surface after , <br /> placing and finishing. Weather permitting, keep continuously moist for not less than 7 <br /> days. <br /> Begin final curing procedures immediately following initial curing and before concrete ' <br /> has dried. Continue final curing for at least 7 days in accordance with ACI 301 <br /> procedures. Avoid rapid drying at end of final curing period. , <br /> Curin� Methods: Perform Euring of concrete by curing and seallnR compound, by moist <br /> curing, by moisture-retaining cover curing, and by combinations thereof, as herein <br /> specified. � <br /> Provide moisture-cover curinAs as follows. <br /> � <br /> Cover concrete surfaces with moistuce-retaining cover for curing concrete, placed <br /> in widest practicable width with sides and ends lapped at least 3" and sealed by <br /> waterproof tape or adhesive. Im mediately repair any holes or tears durins curing � <br /> period using cover material and waterp�oof tape. <br /> ' <br /> 3.08 REMOVAL OF FORMS: � <br /> Form facinR material may be removed 4 days after placement, only if shores and other <br /> vertical supports have been arranged to permit removal of form facinR material without � <br /> loosening or disturbinR shores and supports. <br /> ' <br /> � <br /> � <br /> � CONCRETE WORK 03310 - 10 � <br />