Abstract : the result of experiment shows that und er the conditions of proper ai r - entraining , concrete with 20 % fly ash has excellent frost - resistance . the frost - resistance of concrete with 55 % fly - ash which is admixed with united expansive agent ( uea ) has been improved greatly . the frost - resistance of sulfate aluminate cement concrete with high volume of fly - ash is dramatically lower than that of silicate cement concrete with the same volume of fly - ash 文摘:试验结果表明：粉煤灰掺量为20的混凝土在适量引气的条件下具有良好的抗盐冻性能；粉煤灰掺量为55的混凝土在掺加uea膨胀剂后其抗盐冻性能有明显改善；大掺量粉煤灰硫铝酸盐水泥混凝土的抗盐冻性大大低于同掺量的硅酸盐水泥混凝土。
