硅粉混凝土基本性能试验及作用机理研究

Basic performance test and action mechanism of silica fume concrete

为研究硅粉对混凝土基本性能的影响,选取硅粉掺量分别为2%,3%,4%,5%,6%,7%,8%,9%,10%,11%,12%,进行硅粉混凝土的抗压强度、流动度和耐久性试验,并对其进行机理分析。结果表明:硅粉混凝土强度随硅粉掺量逐渐递增,其增长趋势变慢;硅粉混凝土流动度随硅粉掺量逐渐减小,其减小速度逐渐变慢;硅粉混凝土100 d强度随硅粉掺量逐渐递增,但增长趋势变慢。

In order to study the effect of silicon powder on the basic properties of concrete,the content of silica powder was selected as 2%,3%,4%,5%,6%,7%,8%,9%,10%,11%and 12%.The compressive strength,fluidity and durability of silicon powder concrete were tested,and the mechanism was analyzed.The results show that the strength of silica fume concrete increases with the content of silica fume gradually,its growth trend is slow.The flow degree of silica fume concrete decreases with the content of silica fume,and its decrease speed gradually slows down.The 100 day strength of silica fume concrete gradually increases with the content of silica powder,but the growth trend is slow.