橡胶粉对于混凝土收缩开裂性能的影响

Influence of rubber powder on shrinkage cracking of concrete

采用平板开裂和圆环开裂试验方法,对4种掺量下(0、60、120、240kg/m3)橡胶混凝土的收缩开裂性进行了试验研究分析,并从橡胶性能出发,探讨了橡胶粉对于混凝土收缩变形的影响机制。结果表明橡胶粉对混凝土塑性开裂没有起到明显抑制作用,但是显著改善了混凝土的干缩开裂。

Combining slab crack test,ring crack test and dry shrinkage test, the shrinkage cracking of four different dosage（ 0,60,120,240 kg/m^3） rubber concrete were studied.The mechanism influenced is discussed from the rubber performance.The experimental results show that rubber could not reduce the cracking in fluid stage, but improve the dry shrinkage cracking in hardened period.