Preparation of controlled low strength materials with sandy soils and construction waste
Controlled low strength material(CLSM)was prepared by mixing sandy soil and fine aggregate from construction waste,and the variation rules of fluidity,bleeding rate,setting time and compressive strength of CLSM were investigated under dif-ferent mass ratios of sandy soil and fine aggregate from construction waste.The physical composition and micro-morphology of CLSM were investigated by XRD and SEM.The results show that with the decrease of the mass ratio of sandy soil and construc-tion waste fine aggregate,the bleeding rate and fluidity of CLSM decrease,the setting time shortens,and the compressive strength increases.The problem of high bleeding rate was solved by mixing sandy soil with fine aggregate of construction waste,and when the mass ratio of the two was 1∶1,the fluidity,bleeding rate,setting time and compressive strength were in line with the require-ments of municipal pipeline backfill construction.
controlled low strength materialssandy soilsconstruction waste fine aggregatesphysical propertiesmicro-structure
万方数据
维普
