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COLD WEATHER CONCRETE GUIDE FOR STRUCTURAL …

800-CEMSTONE | A cold WEATHER CONCRETE PLANRECOMMENDED CONCRETE TEMPERATURES & CURING DURATIONPRE-PLACEMENT, TEMPERATURE, HEATED ENCLOSURE CONCRETE MIXTURE, SLAB FINISHING & CURINGTEN cold WEATHER TIPS1234 cold WEATHER CONCRETE GUIDE FORSTRUCTURAL CONCRETEENGINEERING SERVICES The American CONCRETE Institute (ACI) 306R-16 GUIDE to cold WEATHER Concreting states that cold WEATHER concreting exists when the air temperature has fallen to or is expected to fall below 40 F during the protection period. The protection period is defined as the amount of time recommended to prevent CONCRETE from being adversely affected by exposure to cold WEATHER during construction.

Concrete can resist the effects of one freeze-thaw cycle as long as it is properly air-entrained, not exposed to an external water source, and has reached a COMPRESSIVE STRENGTH OF 500 psi. For well- proportioned concrete mixtures, this is typically within 48 hours of placement when the concrete temperature is maintained at 50 °F. 01

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