钢渣比表面积和掺入量对水泥性能的影响

Influences of Specific Area and Amount of steel slag on Cement performance

提高钢渣的综合利用已经成为亟需解决的环境课题和资源课题,意义重大。研究了钢渣比表面积及掺入量对硅酸盐水泥标准稠度需水量、凝结时间和强度的影响;同时研究了钢渣(比表面积约为400m2/kg)与矿渣或钢渣与粉煤灰复掺,对水泥强度的影响;并通过FI-IR和SEM测定,对养护28d的硬化浆体水化产物的物相组成、形貌及微观结构进行了分析。结果表明:(1)钢渣的比表面积越大,其活性越高;(2)掺加适量(≤30%)磨细钢渣,可以提高硬化浆体的致密度,降低孔隙率,提高强度;(3)钢渣与矿渣、钢渣与粉煤灰复掺时,综合效果更佳。

It has become an urgent environment and resource problem to improve comprehensive utilization of steel slag. Influences of specific area of steel slag and the mixing amount on the water requirement of normal consistency, setting time and compressive strength of cement were studied as well as the influence of the mixture composed by steel slag and slag or fly ash on the strength of cement, The appearance and microstructure of hardened paste were investigated by FI-IR and SEM. The experimaent results show as follows： （1）the larger specific area of steel slag, the higher its activity; （2）Adding proper content of grinding steel slag（≤〈30%） can increase the density, reduce porosity and improve the strength of the hardened paste, （3）If compounded with slag or fly ash, the results will be better.