Experimental study of stress-strain properties of lead-contaminated soils 
treated by magnesium phosphate cement

ZHANG Ting-ting; LI Jiang-shan; WANG Ping; LI Zhen-ze

doi:10.16285/j.rsm.2016.S1.028

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Experimental study of stress-strain properties of lead-contaminated soils treated by magnesium phosphate cement

更新时间：2026-06-25

- Experimental study of stress-strain properties of lead-contaminated soils treated by magnesium phosphate cement
- Vol. 37, Issue S1, Pages: 215-225(2016)
- 作者机构：
  
  中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北,武汉,430071
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.S1.028
  CLC： TU473.1
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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ZHANG Ting-ting, LI Jiang-shan, WANG Ping, et al. Experimental study of stress-strain properties of lead-contaminated soils treated by magnesium phosphate cement[J]. 2016, 37(S1): 215-225.
DOI：

ZHANG Ting-ting, LI Jiang-shan, WANG Ping, et al. Experimental study of stress-strain properties of lead-contaminated soils treated by magnesium phosphate cement[J]. 2016, 37(S1): 215-225. DOI： 10.16285/j.rsm.2016.S1.028.

摘要

采用磷酸镁水泥（MPC）对铅污染土进行固化/稳定化处理。基于无侧限抗压强度试验，系统地研究了MPC添加量、养护龄期、水土比和污染土铅含量对固化污染土应力-应变特性的影响规律。结果表明，固化污染土的应力-应变曲线呈现出3个阶段，即压密阶段、弹性阶段和破坏阶段；随着MPC添加量和养护龄期的增加，固化污染土的抗压强度qu增大，变形模量E50增大，破坏应变εf减小；水土比和铅含量对固化土的抗压强度qu和E50均存在临界值，分别为0.45和500 mg/kg，低于临界值时，固化土的qu和E50随着铅含量和水土比的增加而增加，εf随着qu增加呈幂函数规律减小，E50随着qu的增加呈线性增加，E50随着εf的增加呈幂函数规律减小。

Abstract

Magnesium phosphate cement(MPC) is used to stabilize/solidify lead-contaminated soils. Unconfined compressive strength tests are conducted to investigate the variation of stress-strain properties of MPC treated lead-contaminated soils along with MPC dosage

curing time

water content and lead concentration. The results show that stress-strain curves of lead-contaminated soils can be divided into three stages: compaction stage

elastic stage and destruction stage. The qu

and E50 increase significantly with MPC dosage and curing time

while the εf change oppositely. There are threshold values for water content and lead concentration in terms of its influence on qu and E50

where qu is the threshold value of 0.45 and E50 is the threshold value of 500 mg/kg. The qu

and E50 increase with the lead concentration and water content before they reach the threshold value. The qu decreased as power function with the increase of εf. E50 increase linearly with qu while decrease monomially with εf

where below the critical value.

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