寒冷的天气进行混凝土施工,容易产生早期结冰损坏混凝土;即使混凝土不结冰,低温也会推迟凝结时间和延长硬化时间,砌块脱模慢且强度发展也缓慢。低温促凝剂可用于混凝土浇注时且暴露在环境温度低于冰点的情况下。该外加剂能加速凝结,增加早期和后期强度。含有这种外加剂的混凝土放置在20℉的 Concrete construction in cold weather is prone to early icing and damage to concrete; even if the concrete does not freeze, the low temperature will delay the setting time and extend the hardening time, and the demoulding of the block is slow and the strength development is also slow. The low temperature coagulant can be used when concrete is poured and exposed to ambient temperatures below freezing. The admixture accelerates condensation and increases early and late strength. Concrete containing this admixture is placed at 20°F