摘要
自密实混凝土(SCC)作为填充层已经运用在CRTSⅢ型轨道中,但是在使用过程中其工作性能还不能完全达到要求,尤其是它的工作性。本文通过不同砂率下自密实混凝土的拌合试验,主要研究了砂率对其工作性的影响。试验结果表明,当砂率太小时,自密实混凝土的工作性很差,而且会出现离析和泌水现象;而当砂率太大时,混凝土的工作性也不好,但是不会产生离析。砂率的最佳范围为0.56到0.58之间。
Self-compacting concrete（SCC） has been used in CRTS（China Railway Track System） Ⅲ type track,but its performances especially the workability can＇t meet all requirements in the usage of SCC yet.This paper primary researched the influence of sand ratio on its performance through preparing SCC of different sand ratio.Test results show that when sand ratio is too small,the fluidity of SCC will be bad and the concrete will generate segregation and weeping.If sand ratio is too great,the workability of SCC will not be good either,but segregation will not occur again.The optimum range of sand ratio is 0.56 to 0.58.
出处
《中国建材科技》
2012年第5期52-55,共4页
China Building Materials Science & Technology
