在大体积混凝土中掺入一定数量的粉煤灰,除了可以节约水泥,获得较好的直接经济效益外,还可以简化温控,提高混凝土的和易性和抗裂性能等。目前,我国已有不少工程在大坝混凝土中掺用了粉煤灰,其中,由水电部第十一工程局负责施工的河南省故县水库工程就是一个很有特色的实例。 In a large volume of concrete mixed with a certain amount of fly ash, in addition to saving the cement, get better direct economic benefits, but also can simplify the temperature control, improve the workability and crack resistance of concrete. At present, many projects in our country have been mixed with fly ash in the dam concrete. Among them, the project of Guxian Reservoir in Henan Province, which is under the responsibility of the Eleventh Engineering Bureau of the Ministry of Electric Power and Energy, is a very characteristic example.