This admixture retards setting time by controlling the hydration of Portland cement and other cementitious materials while facilitating placing and finishing operations.
Features and benefits are:
Founded in 1904, the American Concrete Institute (ASI), is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction and materials, who share a commitment to pursuing the best use of concrete.
ACI defines COLD WEATHER as “3 days of 40-degrees Fahrenheit or lower outside temperature”.
ACI Table 3.1 – requires that all Portland cement-based concrete products be produced during “Cold Weather”: at a minimum temperature of not less than 55-degrees F.
Concrete that will be exposed to little or no freezing and thawing in service or during construction, such as foundations and substructures, be maintained at a minimum temperature of not less than 55-degrees F for 2 days minimum.
Concrete that will be exposed to weather in service or during construction be maintained at a temperature of not less than 55-degrees F for 3 days minimum.This information supplied by:
Allan Kramer, BSIE, ASTM, ACE, CSI, ASCE
Technical Services Manager for Lehigh Northwest Cement Co.