摘要
工业固废钢渣存在排放量大、利用率不足等问题,设计研究了一种钢渣基胶凝材料,并将其应用于土壤固化.对比探究了钢渣基固化土和水泥固化土的无侧限抗压强度、水稳定性、浸水膨胀率、抗干湿循环和抗冻融循环性能.综合考虑材料成本和性能,钢渣基胶凝材料的最佳掺量为7％.在此掺量下,钢渣基固化土的无侧限抗压强度高于水泥固化土,且随着钢渣的粒径减小,固化土的无侧限抗压强度提高;钢渣基固化土的水稳定性和抗干湿循环性能优于水泥固化土,浸水膨胀率相近,能满足一般工程应用的要求;而抗冻融循环性能均表现较差,无法满足严寒地区特殊使用的要求.
Abstract
Steel slag,as a large-scale industrial solid waste,has problems such as large output and insufficient utilization.Therefore,this article designs and studies a steel slag-based cementitious material and applies it to soil stabilization.The experi-ment compares the steel slag-based cementitious material with cement,and explores the unconfined compressive strength,water sta-bility,immersion expansion rate,resistance to dry-wet cycle and freeze-thaw cycle ability of steel slag-based stabilized soil and ce-ment stabilized soil.Considering the cost and performance of the material comprehensively,the optimal dosage of steel slag-based cementitious material is 7％.At this dosage,the unconfined compressive strength of steel slag-based stabilized soil is higher than that of cement soil,and as the particle size of steel slag decreases,the unconfined compressive strength of stabilized soil increases,the water stability and resistance to dry-wet cycle ability of steel slag stabilized soil are better than those of cement soil,the im-mersion expansion rate is similar,which can meet the requirements of general engineering applications;however,the freeze-thaw performance is poor and cannot meet the special use requirements in severe cold areas.
维普
万方数据