What are the curing requirements for concrete pavement in South Dakota?

"application is not a substitute for curing with curing blankets and polyethylene sheeting but is required for moisture retention until the curing blankets and polyethylene curing materials can be placed. The curing blankets and polyethylene sheeting curing materials will be in place not later than 4 hours after completion of concrete surface finishing." [1] "The concrete surfaces which are to have superimposed concrete placed upon or against them will be protected from the curing compound and will be cured with curing blankets and white polyethylene sheeting." [1] "Curing will be maintained for seven days. The curing blankets will be kept moist by periodic applications of water." [1] "Concrete surfaces will be kept continuously wet by ponding, spraying, or covering with materials that are kept continuously and thoroughly wet. Such materials will consist of a double layer of a curing blanket or other materials, as approved by the Engineer, which does not discolor or damage the concrete. Forms will be considered as adequate cover for curing the formed surface as long as the forms remain in place without loosening. Curing will continue for not less than seven days after placing the concrete." [3] "In lieu of the above method of curing, liquid membrane curing compound may be used. The compound will be uniformly applied immediately after the final finishing operations are completed and the free water has left the surface. The curing compound may be applied in one or two applications in accordance with the directions of the manufacturer. If applied in two applications, the second will be applied within 30 minutes of the first." [3] "Equipment, workmen, and materials will not be allowed on the surface for a minimum of seven days after application of the curing compound, unless the surface is adequately protected with an approved material. This protection will not be applied for at least eight hours after application of the curing compound. If the membrane film is broken or damaged within the seven day curing period, the areas affected will be given a duplicate treatment of the curing material, at the same application rate as the first treatment." [3] "Immediately after placement, the curing blankets will be covered with white polyethylene sheeting placed in accordance with Section 380.3 M.3 . Combination burlap-polyethylene sheeting may be substituted for the layer of curing blanket and the polyethylene sheeting with the Engineer’s approval. The curing blankets will be kept moist by periodic applications of water." [5] "The entire surface of the pavement will be sprayed uniformly with white pigmented curing compound immediately after the finishing of the surface. If the pavement is cured initially with curing blankets, the impervious membrane will be applied immediately upon removal of the curing blankets. The curing compound will not be applied during or immediately after rainfall." [5] "Curing compound will be applied under pressure by approved self-propelled mechanical sprayers. The curing compound may be applied in one or two applications. If applied in two applications, the second will be applied within 30 minutes after the first." [5]

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