低强度钢渣混凝土抗压及抗渗性能试验研究

Experimental study on compressive strength and impermeability of low strength slag concrete

为了研究低强度钢渣混凝土的抗压及抗渗性能,本文通过试验,研究了不同磨细钢渣掺量对混凝土抗压强度和抗渗性能的影响。试验结果表明:钢渣代替细骨料配制胶砂试件和低强度混凝土试块,通过胶砂试件强度和流动度的测定得出,不同钢渣掺量对胶砂试件强度和流动度的影响是非常敏感的,其强度随着掺量的增加整体呈降低的趋势;流动度亦呈现类似的变化特征,但钢渣掺量的比例易控制在20%~30%之间。本次试验所用钢渣宜制备低强度混凝土,各龄期的抗压强度随着钢渣掺量的增大而减小,同时,其抗渗性能也随着钢渣掺量的增加而降低,主要原因是其内部结构增加了更多的孔隙水通道,导致其抗压强度也随之降低。本实验研究结果可为研究低强度钢渣混凝土力学性能和抗渗性能提供一定的参考。

In order to study the compressive strength and impermeability of low strength steel slag concrete,this paper studies the influence of different contents of ground steel slag on the compressive strength and impermeability of concrete through experiments.The test results show that steel slag is used to prepare mortar bar and low strength concrete block instead of fine aggregate.Through the determination of strength and fluidity of mortar bar,it is concluded that the influence of different steel slag content on the strength and fluidity of mortar bar is of sensitivity,with its strength decreasing with the increase of the content of steel slag.This is similar to the change characteristics,but the proportion of steel slag content is easy to control between 20%~30%.The steel slag used in this test is suitable for preparing low-strength concrete.The compressive strength of each age decreases with the increase of steel slag content.Meanwhile,the impermeability of steel slag decreases with the increase of steel slag content.The main reason is that using the internal structure of steel slag increases more pore water channels,leading to the decrease of its compressive strength.The experimental results can provide some reference for the study of mechanical properties and impermeability of low strength steel slag concrete.