在混凝土中掺用粉煤灰,能改善施工和易性,提高浇筑质量,改善混凝土孔结构,提高混凝土的抗渗性,提高混凝土抗硫酸盐侵蚀的能力,抑制碱骨料反应,减少混凝土干缩,并能降低温升,不少国家都广泛地在大坝混凝土中掺用粉煤灰,将它作为大坝混凝土的混合材已有几十年的历史。 The use of fly ash in concrete can improve the workability, improve the quality of pouring, improve the pore structure of concrete, improve the impermeability of concrete, increase the ability of concrete to resist sulphate erosion, inhibit the reaction of alkali aggregate, and reduce the amount of concrete dry. Shrinking, and can reduce the temperature rise, many countries have extensively mixed with fly ash in the dam concrete, as the dam’s concrete mixture has been decades of history.