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DocuSign Envelope ID:AOF53191-262C-4CB2-B674-9AB9C758A904 <br /> A. Filling In:Fill in holes and openings left in concrete structures after work of other trades is in place <br /> unless otherwise indicated.Mix,place,and cure concrete,as specified,to blend with in-place <br /> construction.Provide other miscellaneous concrete filling indicated or required to complete the Work. <br /> 3.10 CONCRETE PROTECTING AND CURING <br /> A. General:Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. <br /> Comply with ACI 306.1 for cold-weather protection and ACI 305.1 for hot-weather protection during <br /> curing. <br /> B. Evaporation Retarder:Apply evaporation retarder to unformed concrete surfaces if hot,dry,or windy <br /> conditions cause moisture loss approaching 0.2 lb/sq.ft.x h before and during finishing operations. <br /> Apply according to manufacturer's written instructions after placing, screeding,and bull floating or <br /> darbying concrete,but before float finishing. <br /> C. Formed Surfaces: Cure formed concrete surfaces.If forms remain during curing period,moist cure after <br /> loosening forms.If removing forms before end of curing period,continue curing for the remainder of the <br /> curing period. <br /> D. Unformed Surfaces:Begin curing immediately after finishing concrete. Cure unformed surfaces, <br /> including floors and slabs,concrete floor toppings,and other surfaces. <br /> E. Cure concrete according to ACI 308.1,by one or a combination of the following methods: <br /> 1. Moisture Curing:Keep surfaces continuously moist for not less than seven days with the <br /> following materials: <br /> a. Water. <br /> b. Continuous water-fog spray. <br /> C. Absorptive cover,water saturated,and kept continuously wet. Cover concrete surfaces <br /> and edges with 12-inch lap over adjacent absorptive covers. <br /> 2. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for <br /> curing concrete,placed in widest practicable width,with sides and ends lapped at least 12 inches, <br /> and sealed by waterproof tape or adhesive. Cure for not less than seven days. Immediately repair <br /> any holes or tears during curing period using cover material and waterproof tape. <br /> a. Moisture cure or use moisture-retaining covers to cure concrete surfaces to receive floor <br /> coverings. <br /> b. Moisture cure or use moisture-retaining covers to cure concrete surfaces to receive <br /> penetrating liquid floor treatments. <br /> C. Cure concrete surfaces to receive floor coverings with either a moisture-retaining cover <br /> or a curing compound that the manufacturer certifies will not interfere with bonding of <br /> floor covering used on Project. <br /> 3. Curing Compound:Apply uniformly in continuous operation by power spray or roller according <br /> to manufacturer's written instructions.Recoat areas subjected to heavy rainfall within three hours <br /> after initial application.Maintain continuity of coating and repair damage during curing period. <br /> a. Removal:After curing period has elapsed,remove curing compound without damaging <br /> concrete surfaces by method recommended by curing compound manufacturer unless <br /> m nufacturer certifies curing compound will not interfere with bonding of floor covering <br /> used on Project. <br />