摘要：为研究粉煤灰粒径对硅酸盐凝胶材料水化性能的影响, 经球磨仪研磨得到3种不同粒径的粉煤灰, 探讨其对硅酸盐水泥水化放热速率、水化放热总量、水化反应程度和粉煤灰自身水化反应程度的影响。结果表明:随粉煤灰粒径的减小, 粉煤灰的水化活性明显增大, 水化反应程度增大, 养护龄期为7 d时, 水化程度增加20.7%;粉煤灰粒径分布对硅酸盐水泥水化放热总量的影响较小, 主要影响其水化放热速率、水化反应程度, 养护龄期为28 d时, 胶凝材料水化程度增加3%。

关键词：粉煤灰；粒径分布；硅酸盐水泥；水化放热量；水化程度

Abstract：In order to study the influence of particle size of fly ash on the hydration property of silicate gel materials, three kinds of fly ash with different particle size distribution were obtained by grinding with ball mill. The influence of them on the rate and amount of hydration heat, the hydration degree of silicate cement and the hydration degree of themselves was studied. The results show that the hydration activity of fly ash increase obviously, the degree of hydration reaction increase, the hydration degree increase by 20.7% at 7 d with the decrease of the particle size of fly ash, and reaction on the total amount of hydration heat of silicate cement materials is small. The influence of particle size of fly ash mainly lies in rate of hydration heat and the hydration degree. The hydration degree of cementitious materials increases by 3% at 28 d.

Keywords: fly ash；particle size distribution；silicate cement；heat of hydration；hydration degree