本文通过对硅粉与水泥石中氢氧化钙反应而生成胶凝物质的二次水化作用,研究硅粉对混凝土性能的影响。生成新的胶凝物质填充了水泥石中的一部分毛细孔,使水泥石密实度提高,强度增高,而且混凝土的抗渗性、抗冻性、抗侵蚀性和耐久性等各项性能指标大大提高。 In this paper, the effect of silica fume on the performance of concrete was studied by the secondary hydration of the gelled material produced by the reaction of calcium hydroxide and calcium hydroxide in cement paste. The formation of a new gelling material fills a portion of the capillary pores in the cement stone, so that the density of the cement stone is improved, the strength is increased, and the performance indexes such as impermeability, frost resistance, erosion resistance and durability of the concrete are greatly improved. .