硅酸盐通报2024，Vol.43Issue(7)：2602-2611,10.
弱碱激发条件下磷渣-水泥复合填料路用性能试验研究
Experimental Study on Road Performance of Weak Alkali-Activated Phosphorus Slag-Cement Composite Filler
摘要
Abstract
Taking solidified phosphorus slag as filler for roadbed or pavement base is an effective way to utilize solid waste resources,which has wildly economic benefits and social value.In this paper,the road performance of phosphorus slag-cement composite filler was analyzed in terms of strength and water durability through laboratory and on-site tests.Then,the availability of the solidification method was discussed through specific engineering cases.The test results indicate that under weak alkali activation(pH=8.0),the compacted phosphorus slag mixture can form a solidified body,whose strength could meet the requirements of roadbed filler.However,strength incensement of solidified body is relatively slow.The compressive strength of solidified body after 7 d is about 50％of the compressive strength after 28 d.The solidified phosphorus slag-cement composite filler is water resistance.Once the cement clinker content is greater than 7％(mass fraction),the damage that affects the integrity of the sample cannot be observed during a 60 dfree soaking,and the softening coefficient of the solidified sample decreases as the content of cement increases.Moreover,keeping the strength as a constant,using curing agent(Na2SiO3)can save the amount of cement used and improve the economic efficiency of solidification method.Excessive alkali activation(pH=10.0)can only improve the early strength of solidified body and has little effect on the 28 d strength.Finally,the on-site engineering practice shows that the weak alkali-activated phosphorus slag solidification method can effectively reuse of phosphorus slag resource,which has strong generalizability in highway roadbed and pavement base filling engineering.关键词
磷渣(磷石膏)/固体废弃物/碱激发/水泥固化/水稳性/路基填料/路面基层材料Key words
phosphorus slag(phosphogypsum)/solid waste/alkali activation/cement solidification/water durability/roadbed filler/pavement base material分类
建筑与水利引用本文复制引用
殷源,林康,曾卫新,程树范..弱碱激发条件下磷渣-水泥复合填料路用性能试验研究[J].硅酸盐通报,2024,43(7):2602-2611,10.基金项目
国家自然科学基金(51878521,42107175,12172280) （51878521,42107175,12172280）
