环境工程学报2018，Vol.12Issue(1)：220-226,7.DOI:10.12030/j.cjee.201703110
干湿循环对Pb污染土固化体力学和浸出特性的影响
Effect of wetting-drying cycles on mechanical and leaching properties of solidified lead-contaminated soils
摘要
Abstract
Portland cement (OPC) and magnesium phosphate cement (MPC) were used to stabilize/solidify lead-contaminated soils.Unconfined compressive strength test,permeability test,leaching test and MIP test were conducted to investigate the variation of mechanical properties and leaching properties of OPC and MPC treated lead-contaminated soils along with wetting-drying cycle tests.Results showed that wetting-drying cycles could reduced mechanical property of OPC and MPC solidified soil,while wetting-drying cycles durability of OPC solidified soil is worse than MPC solidified soil.Lead concentration of OPC and MPC solidified soil were increased with the times of wetting-drying cycle,the lead concentration of OPC solidified soil was above the regulations,when the times of wetting-drying cycle exceed 5,while the lead concentration of MPC solidified soil was conformed with the regulations in the whole wetting-drying cycle test.MIP test results showed that the pore volume of diameter larger than 1 μm for OPC and MPC solidified soil were increased significantly with the times of wettingdrying cycle.The changing in mechanical properties of OPC and MPC can be attributed to the increases of the pore volume of diameter larger than 1 μm,and the difference of lead concentration of OPC and MPC solidified soil can be attributed to the difference of solidified/stabilized mechanism.关键词
干湿循环/Pb污染土/力学特性/浸出特性Key words
wetting-drying cycle/lead-contaminated soils/mechanical properties/leaching properties分类
资源环境引用本文复制引用
赵三青..干湿循环对Pb污染土固化体力学和浸出特性的影响[J].环境工程学报,2018,12(1):220-226,7.基金项目
武昌工学院教学研究项目(2015KYZ03) （2015KYZ03）
