LOW-HEAT SPECIAL CEMENTS DESIGNED FOR MASSIVE CONCRETE

摘要

Because of the stress complexity massive concrete, such as the concrete for dams, has to undergo, it needs to feature good strength, good corrosion and freeze-thaw resistance, low shrinkage, low permeability and low exothermicity. In order that the concrete show lower exothermicity, the cement used in its fabrication needs to release as low a heat amount as possible from the exothermic processes of hydration and hydrolysis taking place at hardening. The paper presents the results of laboratory investigations on developing low-heat special cements. Major properties (setting time, soundness, water demand, standard strength, heat of hydration, etc.) of the obtained low-heat cements are revealed. The effect of the nature and ratio of the main additional constituents on the heat of hydration of the low-heat special cements is revealed.