INHIBITOR FOR RISE OF TEMPERATURE OF CEMENT COMPOSITION AND METHOD FOR INHIBITING RISE OF TEMPERATURE

PURPOSE:To inhibit the rise of the temp. of a cement compsn. by the heat of hydration by mixing the cement compsn. with lactone. CONSTITUTION:A cement compsn. such as cement concrete, cement mortal, cement paste based on cement such as common, moderate heat, high early strength or white Portland cement, Porland blast furnace cement or alumina cement, is mixed with lactone such as gluconolactone, glucoheptoic acid-gamma- lactone, saccharic acid-1,4-lactone, alpha,beta-glucooctanoic acid-gamma-lactone or (dehydro) ascorbic acid. The amt. of the lactone used is 0.01-3.0wt.% of the amt. of the cement. The cement compsn. may further be mixed with a water reducer such as ligninsulfonate, a retarder such as silicofluoride and tannic acid as a reducer for the rate of generation of heat by hydration for mass concrete.