钢渣粉用于公路基层材料的试验研究

Study on Steel Slag Used for Road Base Material

钢渣通过水泥实验磨的磨细,用1000目、500目和200目方孔筛筛选后,按照5:4:1组合的钢渣微粉,经过激光粒度分析仪检测,与硅酸盐水泥颗粒粒径相似;在水泥和钢渣粉比例为1:4时,75μm以下颗粒占70%,基于磨细钢渣粉的潜在的活性和细度,钢渣粉既可以和水泥共同作为胶凝材料,也可以为增加稳定碎石的密实程度作为填充材料。试验证明,钢渣粉总用量不超过24%,稳定材料的7 d无侧限抗压强度满足规范设计强度要求;电镜扫描证明了水泥用量不变的情况下,钢渣粉掺量的增加,水化产物的C2S,C3S含量增多,但是有较多的钢渣颗粒未参与反应。材料孔隙率是影响干缩的主要原因。

Slag is milled,filtered with 1000 mesh,500 mesh and 200 mesh square hole,by 5:4:1 combination of the steel slag powder,laser particle size analyzer can tell us,the powder has similar particles with Portland cement;in the cement and slag powder ratio of 1:4,70% of particles in the 75μm,Based on the potential activity and fineness of slag powder,Steel powder and cement both together as a binder,it can also increase the density of Aggregate stability as the filling material.This experiment shows that the total...