![]() ![]() This globally enforced 1935 rule requires the completion of concrete discharge within 1½ hours after the introduction of mixing water to the cement and aggregates, or the introduction of the cement to aggregates. One of the main factors for rejecting a great number of truckloads of concrete every year the time limit restrictions, specified by ASTM C 94, Specification for Ready Mixed Concrete RMC. This waste is expected to increase as we increase the use of concrete to repair our aging infrastructure. Every year, a substantial amount of ready-mixed concrete is returned to concrete plant for disposal. ![]() Concrete alone accounts for 8% of global carbon emissions. ![]()
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