硅灰改性透水混凝土配合比设计及性能试验研究

Design and Performance Test of Modified Pervious Concrete with Silica Fume

采用硅灰对透水混凝土进行改性,研究不同硅灰掺量对透水混凝土的抗压强度、抗折强度和透水系数的影响。研究结果表明:(1)硅灰的掺入可以提高透水混凝土的抗压强度但是对于透水混凝土的弹性模量影响较小,当硅灰掺量为20%时抗压强度增幅最大;(2)硅灰的掺入对于透水混凝土的抗折强度影响较小,并不能很好的改善透水混凝土的抗折强度;(3)随着硅灰的掺量增加,透水混凝土的透水系数也逐渐增加,硅灰掺量较小时,透水系数增长幅度较大,随着掺量不断增加,增长幅度逐渐变小。

The pervious concrete was modified by silica fume.The effects of different silica fume content on the compressive strength,flexural strength and pervious coefficient of pervious concrete were studied.The results show that:(1)the addition of silica fume can improve the compressive strength of pervious concrete,but has little effect on the elastic modulus of pervious concrete;(2)the addition of silica fume has little effect on the flexural strength of pervious concrete,and it cannot improve the flexural strength of pervious concrete;(3)as the content of silica fume increases,the permeability coefficient of permeable concrete also increases gradually.When the content of silica fume is small,the permeability coefficient increases in a large range.As the content of silica fume continues to increase,the increase range gradually decreases.