进行了混凝土在 3.5 %盐溶液中快速冻融的实验研究 ,结果表明盐溶液对混凝土抗冻性的影响具有双重性 ,盐溶液使混凝土试件表面饱和程度提高 ,从而导致其严重剥落 ,重量损失大幅度增加 ,溶液降低冰点的作用使混凝土内部破坏程度较小 ,相对动弹性模量下降略为缓慢。混凝土的耐久性系数应该考虑相对动弹性模量和重量损失两个指标 The experimental study on rapid freezing and thawing of concrete in 3.5% salt solution showed that the effect of salt solution on the frost resistance of concrete was doubled. The salt solution increased the surface saturation of the concrete specimen, resulting in serious spalling and weight loss A substantial increase in the role of the solution to reduce the freezing point of the internal concrete less damage, the relative dynamic elastic modulus decreased slightly slow. Concrete durability index should consider the relative dynamic elastic modulus and weight loss of two indicators