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<br />002437 <br /> <br />Durango Pumoing Plant - Stage 1 <br /> <br />"Inspection of Construction," will not be made until the material has been <br />satisfactorily applied at the jobsite. <br /> <br />10. Water curing <br /> <br />a. Use water meeting requirements ofthis Section. <br /> <br />b. Keep concrete wet for a minimum of 14 days from the time the concrete <br />has attained sufficient set to prevent it from being damaged by applying <br />water. <br /> <br />c. Keep concrete surfaces wet by covering them with water-saturated <br />material and using a system of perforated pipes, mechanical sprinklers, or <br />porous hose, or other approved methods that will keep all surfaces <br />continuously wet, not periodically wet. <br /> <br />d. Discontinue water curing after 6 days if the mean daily temperature in the <br />vicinity of the worksite is less than 40 "P. <br /> <br />e. Temporarily discontinue water curing during the prescribed period of <br />water curing if ambient temperatures are such that the concrete may <br />freeze. <br /> <br />11. Curing with curing compound: <br /> <br />a. Provide a water-retaining film for curing by application to designated <br />concrete surfaces of a wax-base; or water-emulsified, resin-base curing <br />compound. <br /> <br />b. Thoroughly mix and spray apply the curing compound to the concrete <br />surfaces in one coat to provide a continuous, uniform film over the <br />concrete. <br /> <br />c. Apply at a coverage rate not to exceed 150 square feet per gallon for <br />wax-base or water-emulsified, resin-base compound. <br /> <br />d. Adjust the coverage on rough surfaces as necessary to obtain the required <br />continuous film. <br /> <br />e. Take special care to ensure ample coverage with the compound at edges, <br />corners, and rough surfaces; and to keep curing compound offwaterstops <br />and reinforcing bars. <br /> <br />f. Provide equipment for applying curing compound and the method of <br />application in accordance with the provisions of chapter VI ofUSBR's <br />"Concrete Manual." <br /> <br />g. Take care in applying curing compound to produce a uniform, continuous <br />film, and to avoid sagging, puddling, and excessive thickness. <br /> <br />h. To prevent sagging on surfaces which are not horizontal, apply using two <br />or more passes over each point on the surface, using a cross-spraying <br />technique, and with a time interval between passes not exceeding <br />30 minutes. <br /> <br />Cast-in-Place Concrete <br />03300 - 33 <br />