NC—Ⅱ是一种新型的负温外加剂,其组分中排除了防冻剂。试验表明,在常温下它对混凝土有显著的早强作用,并能同时大幅度提高混凝土的后期强度。只要有液相水存在,它在负温下亦能强烈地促进水泥的水化作用,对具有混凝土抗冻害功能。 NC-II is a novel negative temperature additive whose antifreeze is excluded from its components. Tests have shown that it has a significant early strength effect on concrete at room temperature, and can significantly improve the concrete’s late strength at the same time. As long as there is liquid water, it can also strongly promote the hydration of cement at negative temperature, and it has the function of anti-freezing of concrete.