粉煤灰对混凝土抗冻性能的试验研究

Experimental Study on Frost Resistance of Concrete with Fly Ash

为了研究不同掺量粉煤灰对混凝土抗冻性的影响,试验考虑三种不同强度等级的混凝土,这三种强度级别混凝土对应的水灰比分别为0.45、0.39和0.31,通过快速冻融试验,对冻融过程中混凝土动弹性模量的结果分析发现:掺加粉煤灰能够提高混凝土的抗冻性,并且当粉煤灰掺量为胶凝材料的15%时,混凝土的抗冻性最佳.

In order to study the effect of different amount of fly ash on concrete frost resistance test,considering three different strength grade of concrete,the three strength levels of concrete corresponding water cement ratio are 0.45,0.39 and 0.31,through the rapid freeze-thaw test of concrete dynamic elastic modulus results in freezing and thawing process the analysis found that can improve the frost resistance of concrete mixed with fly ash,and when the dosage of fly ash isl5%of cementitious material,concrete frost resistance is best.