轻集料对补偿收缩混凝土限制膨胀率的增益作用

Positive Effect of Light aggregate to Restrained Expansion Rate of Shrinkage Compensating Concrete

本文研究了不同品种的轻集料,以及轻集料掺量对补偿收缩混凝土限制膨胀率的增益作用。结果表明,在补偿收缩混凝土中掺加部分饱水轻集料,会对其限制膨胀率产生明显的增益作用,特别是在干湿循环情况下,效果更加显著,这个特性对解决地下工程外墙收缩开裂难题具有重要意义。

This paper has researched on different kinds of light aggregates as well as positive effect of content of light aggregate to restrained expansion rate of shrinkage compensating concrete. Results show that obviously positive effect occurs to restrained expansion rate of shrinkage compensating concrete when mixing light aggregate partly filled with water in it, and the effect becomes more evident especially in dry-wet circulating condition. This characteristic has important meaning to resolve shrinkage-crack problem of outside wall in underground projects.