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.
关键词
可控性低强度材料/砂质土/建筑垃圾细骨料/物理性能/微观结构
Key words
controlled low strength materials/sandy soils/construction waste fine aggregates/physical properties/micro-structure
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