《钢筋混凝土施工及验收规范》(GBJ204-83)(以下简称《规范》),对原规范GBJ10-65(修订本)的冬季施工部分,特别是对冬期施工的起止日期、混凝土允许受冻的临界强度、外加剂的应用等做了较大修改。《规范》实施以来,有的施工企业对混凝土冬期施工的特殊性认识不足,致使混凝土的冻害事故连年发生,应引起重视。 “Code for the Construction and Acceptance of Reinforced Concrete” (GBJ204-83) (hereinafter referred to as “the Code”), for the winter construction part of the original specification GBJ10-65 (revised), especially for the start and end dates of winter construction, and the concrete allowed to be frozen. The critical strength, application of admixtures, etc. have been greatly modified. Since the implementation of the “Specifications”, some construction companies have had insufficient knowledge of the special features of concrete during winter construction, resulting in the accidents of frost damage of concrete occurring year after year. Attention should be paid to it.