在冬季浇筑混凝土时,为了防止早期受冻,目前普遍用抗压强度做为抵抗冻害的临界强度,来控制混凝土抵抗早期受冻的能力。本文就有关临界强度问题做以综合介绍,以供参考。一、引言试验研究结果表明,水泥混凝土所以能在负温下缓慢水化,是由于混凝土中存在液相。只要有液 When concrete is poured in winter, in order to prevent early freezing, the compressive strength is generally used as the critical strength against freezing damage to control the ability of concrete to withstand early freezing. This article gives a comprehensive introduction to critical strength issues for reference. I. INTRODUCTION The results of the test study indicate that cement concrete can be slowly hydrated at negative temperatures due to the presence of a liquid phase in the concrete. As long as there is liquid