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粉煤灰在混凝土(特別是大体积混凝土)中的应用,已引起人们普遍重视和广泛的兴趣。这不仅是从节约能源与资源的观点出发,而且它改善了混凝土的施工和易性,提高后期强度,降低内部温升,抑制碱骨料反应,增加抗渗能力,防止侵蚀破坏。同时粉煤灰的应用可改变高标号水泥配制低标号混凝土的不合理现象,有利于节约水泥,降低工程费用等综合效益。然而,必须指出,应用粉
The application of fly ash in concrete (especially mass concrete) has aroused widespread attention and widespread interest. This is not only from the perspective of saving energy and resources, but it also improves the workability of concrete construction, improve the strength of the late stage, reduce the internal temperature rise, inhibit the alkali aggregate reaction, increase the impermeability and prevent the erosion damage. At the same time, the application of fly ash can change the unreasonable phenomenon of high-grade concrete preparation of low-grade concrete, which is good for saving cement and reducing the project cost. However, it must be pointed out that the application of powder