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一、概述在水工混凝土中,利用粉煤灰已有很长的历史。实践证明,混凝土中掺用粉煤灰,不仅节省能源,降低水泥用量,节约工程投资,而且对改善混凝土的和易性,减少泌水、离析以及干缩,提高混凝土的抗渗性,简化温控措施,改善混凝土抗硫酸盐侵蚀能力,抑制碱—骨料反应等亦有明显作用。因此,粉煤灰,特别是优质粉煤灰,是一种良好的混凝土混合材料。
First, an overview In the hydraulic concrete, the use of fly ash has a long history. Practice has proved that concrete mixed with fly ash, not only save energy, reduce the amount of cement, saving investment in engineering, but also to improve the workability of concrete, reduce bleeding, segregation and shrinkage, improve the impermeability of concrete, simplify the temperature Control measures to improve the concrete resistance to sulfate attack, inhibition of alkali - aggregate reaction also have a significant role. Therefore, fly ash, especially high-quality fly ash, is a good concrete mix.