目前,人们仍然在研究混凝土抗冻性,不断尝试多种途径来改善混凝土的抗冻性。尽管有多种理论解释冻坏机理,但并没有哪一种得到普遍认同。根据国内外研究提出的机理成果,人们进行了很多改善混凝土抗冻性的探索,主要有改变水灰比、添加外加剂(引气剂、减水剂等)、掺加粉煤灰等措施。本文主要研究对象为混凝土抗冻耐久性,采用快冻法进行试验,主要内容为:(1)对不同配比混凝土进行冻融循环实验,测试其有关性能(质量损 At present, people are still studying the frost resistance of concrete, constantly trying various ways to improve the frost resistance of concrete. Although there are many theories that explain the mechanism of frostbite, none of them is generally accepted. According to the results of the research presented at home and abroad, many measures have been taken to improve the frost resistance of concrete, such as changing the ratio of water to cement, adding admixture (air entraining agent, water reducer, etc.) and adding fly ash. In this paper, the main object of study for the durability of concrete antifreeze, the use of fast freezing method for testing, the main contents are as follows: (1) different proportions of concrete freeze-thaw cycle test to test its performance (mass loss