水泥固化铜污染土的应力-应变特性研究  

Experimental study of stress-strain properties of cement treated copper-contaminated soils

作　　者：王鹏[1] 丁勇[1] 胡强强[1] 

机构地区：[1]南京理工大学土木工程系,江苏南京210094

出　　处：《河南城建学院学报》2015年第4期1-4,9,共5页Journal of Henan University of Urban Construction

基　　金：中央高校基本科研业务费专项资金资助(30920130112008)

摘　　要：采用普通硅酸盐水泥对铜污染土进行固化处理,对固化后铜污染土的应力-应变特性进行了研究。试验中的铜污染土通过六水硝酸铜制备而成,并设置了不同的铜离子浓度和水泥掺量,养护时间为7d、14d和28d。试验结果表明,在同一水泥掺量下,铜离子在低浓度(浓度小于0.3%)变化时,铜离子对水泥固化铜污染土的应力-应变特性的影响很小,铜离子浓度大于0.3%时强度明显降低。水泥固化铜污染土的破坏应变随着铜离子浓度的增大,呈现先下降后增大的趋势。Cement is used to treat copper-contaminated soil,and the stress-strain characteristics cement stabilized copper contaminated soil was studied. The contaminated soils are prepared form cupric nitrate in laboratory with different copper contents and cement contents. Age is divided into 7 days,14 days and 28 days. The test results show that ： in the same cement content,when the copper concentration is less than 0. 3%,the stress- strain characteristics of cement solidification copper pollution soils changed little,but when Copper concentrations greater than 0. 3%,the UCS significantly becomes lower. Besides,the failure strains with the increasing concentration of copper ions,showing a tendency to increase after the first fall.

关 键 词：固化稳定 铜污染土 重金属 应力-应变 

分 类 号：TU431[建筑科学—岩土工程]