掺GL-B4型高效引气减水剂在混凝土中的抗冻性能试验研究

GL-B4-efficiency air-entraining water-reducing agent in concrete study on the freeze-thaw resistance

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。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,试验得出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。

The frost resistance on different water-cement ratio of concrete after the air-entraining agent admixture.When the gas is controlled about 4%,with the lower water-cement ratio,freeze-thaw resistance of concrete is increased significantly.And then the frost resistance of YC20 and YC40 concrete which are mixed in efficient air-entraining water-reducing agent were studied,the experiment results that when the concrete YC40 reached F300,gas content reached more than 4.5%,and the strength without reducing,the durability would improve.But the YC20 is different,so,GL-B4-efficiency air-entraining water-reducing agent does not apply to the water-cement ratio above 0.6 of the concrete.