中文摘要：

采用水泥系固化剂,对铅污染土进行了固化处理,对固化后污染土的无侧限压缩变形特性进行了研究。试验所用的铅污染土通过人工制备而成,并考虑了不同的铅离子浓度和水泥掺量。研究结果表明,随着污染土中铅含量的变化,水泥固化铅污染土的应力-应变特性、破坏应变、变形模量值不同。铅浓度为0.01%、0.1%试样的破坏应变大于不含铅试样,且随着强度的增加、龄期的增长呈幂函数减小。韧性指数可用来定量描述铅离子浓度对固化土样韧性特征的影响程度。固化铅污染土的变形模量与其无侧限抗压强度呈线性关系,线性拟合参数与铅离子浓度和水泥掺量有关。

英文摘要：

This paper presents a study of the uniaxial unconfined compressive deformation properties of cement stabilized/solidified lead contaminated soils.The contaminated soils are prepared in the laboratory with different lead contents and cement contents.The control samples（cement treated soils without heavy metal） are also prepared for comparison purpose.The test results show that the presence of lead in soil interferes with the cement hydration process,which is directly reflected by the stress-strain curve,failure strain,and deformation modulus of cemented soil.For specimens with 0.01% and 0.1% lead concentration,the strain at failure decrease with the increase of strength and curing time,and are larger than that of control sample.Toughness Index is used to evaluate the toughness of cemented soils.The deformation modulus of cement treated lead contaminated soils changes with the variation of lead content,cement content and curing time.There is a linear relationship between the deformation modulus and unconfined compressive strength.