Laserfiche WebLink
Gateway Park Center PERKINS+WILL <br /> 810495.00 <br />12/06/18 <br />033000-40 Cast-In-Place <br />Concrete <br />2.Concrete shall be kept continuously moist and above 50°F (10°C) for <br />seven days (ASTM C 150 Type I cement) or for 10 days (ASTM C 150 <br />Type II cement). High early strength concrete usage shall be maintained <br />over 50o F (10°C) for three days. <br />3.Concrete and concrete patching materials shall be cured according to <br />manufacturers published recommendations. <br />4.Begin curing as soon as free water has disappeared from concrete <br />surface and finishing has been completed. <br />5.Curing Methods: Cure concrete by curing compound, by moist curing, by <br />moisture-retaining cover curing, or by combining these methods, as <br />specified. <br />a)Apply curing compound on exposed interior slabs and on exterior <br />slabs, walks, and curbs as follows: <br />i.Apply curing compound to concrete slabs as soon as final <br />finishing operations are complete (within 2 hours and after <br />surface water sheen has disappeared). <br />ii.Apply uniformly in continuous operation by power spray or <br />roller according to manufacturer's directions. <br />iii.Recoat areas subjected to heavy rainfall within 3 hours <br />after initial application. <br />iv.Maintain continuity of coating and repair damage during <br />curing period. <br />v.Use curing and sealing compounds that will not affect <br />surfaces to be covered with finish materials applied directly <br />to concrete. <br />vi.Floors to receive covering shall be cleaned thoroughly <br />using a power scrubber and industrial strength detergent. <br />Hand-brooming and sweeping is not sufficient. <br />vii.Strippable curing compound may be used in lieu of a moist <br />curing method when approved by the Design <br />Professionals. <br />b)Provide moist curing by the following methods: <br />i.Keep concrete surface continuously wet by covering with <br />water. <br />ii.Use continuous water-fog spray. <br />iii.Cover concrete surface with specified absorptive cover, <br />thoroughly saturate cover with water, and keep <br />continuously wet. Place absorptive cover to provide <br />coverage of concrete surfaces and edges, with a 4” <br />(100mm) lap over adjacent absorptive covers. <br />c)Provide moisture-retaining cover curing as follows: <br />i.Cover concrete surfaces with moisture-retaining cover for <br />curing concrete, placed in widest practicable width with