本文首先研究了不同水灰比混凝土掺加引气剂后的抗冻性能,控制含气量4%左右时,随水胶比的降低,混凝土的抗冻性能明显增加。然后又对掺GL-B4高效引气减水剂的YC20和YC40混凝土的抗冻性进行了研究,实验得出YC40混凝土达到F300时,含气量达4.5%以上,强度不降低,耐久性能提高。而YC20则不同,因此,GL-B4型高效引气减水剂不适用于水胶比0.6以上的混凝土。 In this paper, the frost resistance of concrete with different water-cement ratio is studied. When the gas content is controlled to about 4%, the frost resistance of concrete increases obviously with the decrease of water-cement ratio. Then the frost resistance of YC20 and YC40 concrete admixed with GL-B4 high efficiency air-entraining water-reducing admixture was studied. It was found that when YC40 concrete reached F300, the gas content reached 4.5%, the strength did not decrease, and the durability was improved. The YC20 is different, therefore, GL-B4 type of high performance air-assisted water-reducing admixture does not apply to the water-cement ratio of more than 0.6 concrete.