环境工程学报2017，Vol.11Issue(5)：3172-3178,7.DOI:10.12030/j.cjee.201512234
稳定剂协同水泥固化/稳定化重金属污染土壤的工程特性
Engineering characteristics of stabilized contaminated soil with heavy metals by cement and SR
摘要
Abstract
The stabilizer(SR) and cement (PC)were used as additive to stabilize contaminated soil with heavy metals.The optimum ratio of cement to SR was determined by testing the cost of the binders as well as the leaching toxicity of lead and zinc.The permeability and strength properties of the solidified soil were evaluated by unconfined compressive strength,unconsolidated-undrained (UU)triaxial tests,and a triple type flexible-wall permeameter test.The optimum proportion of cement to SR was 8％ cement to 2.5％ SR,which could decrease the leaching concentrations of Pb and Zn by 97.5％ and 74.5％,respectively.In this conditions,the 28 d un confined compressive strength of the solidified body (up to 1 080 kPa) was 9.6 times higher than that without treating.An increase in the PC mixing ratio improved the effective cohesion and friction angel,which in turn improved the strength of the stabilized soils.Adding SR improved the penetrance of the stabilization,whereas an increase in the PC mixing ratio effectively decreased the permeability of the treated soil.Under the optimum proportion,the permeability coefficient of the stabilized soil was reduced to 10-6 cm · s-1,which was relatively lower than the one without treating.This could enhance the barrier ability of the soil,and improve the safety utilization.关键词
重金属/固化/稳定化/浸出毒性/强度特性/渗透系数Key words
heavy metals/solidification and stabilization/leaching toxicity/strength properties/permeability coefficient分类
资源环境引用本文复制引用
张志红,陈家煜,郭观林,张琢,王梅,张朝..稳定剂协同水泥固化/稳定化重金属污染土壤的工程特性[J].环境工程学报,2017,11(5):3172-3178,7.基金项目
国家高技术研究发展计划(863)项目(2013AA06A206) （863）
国家自然科学基金面上项目(51378035) （51378035）
