钢渣-水泥固化Cd污染土的强度特性研究  

Research on Strength Characteristic of Solidified Cd Contaminated Soil by Steel-slag and Cement

作　　者：洪正义[1] 孙树林[2] 

机构地区：[1]国家林业局昆明勘察设计院,昆明650000 [2]河海大学地球科学与工程学院,南京210098

出　　处：《科学技术与工程》2016年第8期248-253,共6页Science Technology and Engineering

摘　　要：利用钢渣-水泥胶凝系统固化Cd污染土,通过室内试验,研究不同钢渣-水泥掺量、不同Cd^(2+)浓度以及养护龄期对固化土体的强度及变形的影响。结果表明:1固化土体的无侧限抗压强度随养护龄期的增加而增长,且在7~28 d之间强度增长迅速;2掺入钢渣-水泥后,固化土体的强度显著增长,并在掺量为30%时强度最大,变形较小;3 Cd^(2+)浓度对固化土体也有影响,当Cd^(2+)浓度为0.2%时,固化后土体的强度较之其他浓度大。Based on laboratory tests,different amount mixture of steel-slag and cement,different concentration of cadmium ion（ Cd^2＋）,and curing period influence on intensity and deformation of solidified contaminated soil were researched. The results indicate as follows： ① unconfined compressive strength of solidified soil can enhance while curing period is increasing;② intensity of solidified soil is improved significantly after mixing with steel-slag and cement,moreover,when quantity of steel-slag and cement accounts for thirty percent of contaminated soil,solidified soil can achieve higher intensity and smaller deformation;③ concentration of Cd^2＋ has an impact on solidified soil. After solidification,soil with 0. 2 percent of Cd concentration can achieve higher intensity than other Cd concentration.

关 键 词：Cd污染土 钢渣-水泥胶凝系统 应力 应变 

分 类 号：TU411.6[建筑科学—岩土工程]