South Dakota · answered by Verika · verified against sources
What air content is required for concrete on South Dakota DOT projects?
"For the stationary side form method, the slump of the concrete will be between 1 inch and 3 inches. For the slip-form method, the slump of the concrete will not be more than 2 inches. The concrete will contain 6.5% entrained air with an allowable tolerance of +1% to -1.5%. Air will be entrained by an approved air-entraining admixture." [1] "The entrained air content will be 6% plus or minus 1.5%. For pretensioned prestressed beams, the entrained air content will be 5.5% plus or minus 1.5%." [2] "Concrete used in bridge decks, bridge sidewalks, and barrier curbs will contain 5.5% to 7.5% entrained air." [4]
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