采用快速冻融试验方法研究了熟石灰等量取代部分粉煤灰对粉煤灰混凝土抗冻性能的影响。单掺熟石灰的情况下,以粉煤灰混凝土试件的相对动弹性模量变化情况反映抗冻性能变化。熟石灰掺量为2.5%时,粉煤灰混凝土试件的抗冻性最好。掺量超出2.5%并继续增加时,粉煤灰混凝土试件的抗冻性逐渐减弱。 The fast freezing and thawing test method was used to study the influence of the equivalent amount of slaked lime on the frost resistance of fly ash concrete. In the case of single-doped slaked lime, the change of relative dynamic elastic modulus of fly-ash concrete specimens reflects the change of frost resistance. When the content of slaked lime is 2.5%, the frost resistance of fly ash concrete specimens is the best. The content of more than 2.5% and continue to increase, the concrete freeze-thaw resistance of the fly ash gradually weakened.