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' G Curis�g Methods: Cure concrebe by curing compound, by moist curing, by moisture- <br /> retaining cover curing,or by combining these methods,as specified. <br /> , D. Provide moisture curing by the following methods: <br /> 1. Keep concrete surface continuously wet by covering with water. <br /> , 2. Use continuous water-fog spray. <br /> 3. Cover concrete surface with spec�ed absorptive cover,thoroughly saturate caver <br /> with water, and keep continuously wet. Place absorptive cover to provide <br /> coverage of concrete surfaces and edges, with a 4inch lap over adjacent <br /> ' absorptive covers. <br /> E. Provide moisture-re#aining cover curing as follows: <br /> ' 1. Cover concrete surfaces with moist�re-retaining cover for curing concrete,placed <br /> in widest practicable width with sides and ends lapped at least 3 inches and sealed <br /> by waterproof tape or adhesive. Lnmediately repair any holes or t-ears during <br /> ' curing period using cover material and waterproof tape. <br /> F. Apply curing compound on exposed interior slabs and on exterior slabs,walks,and curbs <br /> ' as follaws: <br /> 1. Apply curing compound to concrete siabs as soon as final finishing operations are <br /> complete(within 2 hours and after surface water sheen has disappeared). Apply <br /> ' uniformly in aontinuous operation by power spray or roller according to <br /> manufacturer's directions. Recoat areas subjected to heavy rainfall within 3 hours <br /> after initial application. Maintain contiauity of coating and repair damage during <br /> ' curing period. <br /> 2. Use membrane curing compounds that witl not affect surfaces to be covered with <br /> fuiish materials applied directly io concrete. <br /> ' G. Guring Unformed Surfaces: Cure unformed surfaces, including slabs, floor topping, and <br /> other flat surfaces,by applying the appropriate curing method. <br /> ' l. Final cure concrete surfaces to receive finish flooring with a moisture-r�taining <br /> caver,unless otherwise directed. <br /> 3.11 C�NCRETE SURFACE REPAIRS <br /> , A. Mix dry-pack mortar,consisting of one part portland cement to 2-1/2 parts fine aggegate <br /> passing a No. 16 mesh sieve,using only enough water as required for <br /> ' handling and placing. <br /> 1. G�t out honeycombs, rock pockets, voids over 1/4 inch in any dimension, and <br /> ' holes left by tie rods and bolts down to solid concrete but in no case to a depth less <br /> than 1 inch. Maice edges of cuts perpendicular to the concrete surface. <br /> Thoroughly clean, dampen with water, and brush-coat the area to be patched with <br /> bonding agent. Place patching martar before bonding agent has dried. <br /> ' 2. For surfaces exposed to view, blend w�ite portland cement and standard portland <br /> c�ment so that, when dry, patching mortar will match surrounding color. Provide <br /> test $reas at inconspicuous locations to verify mixture and color match before <br /> ' proceeding with patching. Compact mortar in place and strike-off siightly higher <br /> than suirounding surface. <br /> A. Sampling and testing for c}uality control during coacrete placement may include the <br /> ' following,as directed by Architect. <br /> 1. Sampling Fnesh Concrete: ASTM C 172, except modified for stump to comply <br /> ' with ASTM C 94. <br /> a. Siump: ASTM C 143;one test at point af discharge for each day's pour of <br /> each Lype of concrete;additional tests when concrete consistency seems to <br /> ' have changed. <br /> CONCRETE Page 7 of 8 <br />