The old concrete produced by urban demolition is used as the recycled aggregate,the natural stone is replaced by the substitution rate of 0,20%,40%and 60%,and the shrinkage reducing-agent is mixed into the mixture with 1%,2%and 3%of the cement quality respectively to prepare the cement stabilized recycled base mixture.The performance of the mixture is tested by the compaction test,unconfined compressive strength test,ultimate flexural tensile test and dry shrinkage test.The results show that:with the increase of the substitution rate of old concrete,the performance of the cement stabilized recycled base mixture declines to varying degrees,and it is suggested that the substitution rate of old concrete should not exceed 40%.When the content of shrinkage reducing agent is 2%,the comprehensive performance of cement stabilized recycled base mixture is the best.
关键词
旧水泥混凝土/减缩剂/水泥稳定基层混合料/再生利用
Key words
Old cement concrete/Shrinkage reducing agent/Cement stabilized base mixture/Recycling
维普
万方数据