期刊论文

Hydraulic and deformation characteristics of kaolin solidified with cement under leachate pollution

Lu, H.-J.

中文

大连理工大学学报

1000-8608

2016

56

5

510-517

10.7511/dllgxb201605011

国家自然科学基金资助项目（51474168;11672216）； 中国科学院岩石力学与工程国家重点实验室开放研究课题（Z014007;Z015006）； 湖北省***计划资助项目；

本校为第一且通讯机构

针对填埋场衬垫在高荷载作用下开裂破坏的现状,采用水泥固化高岭土,评价其抗渗、抗开裂及固结压缩特性,探究其作为填埋场衬垫材料的可行性.采用纯高岭土与水泥掺量5%、10%、15%的固化高岭土进行试验,室内模拟填埋场衬垫受渗沥液污染的工况,通过渗透试验测定水力传导系数,分析其抵抗污染物渗透能力；通过固结试验测定压缩系数,分析其固结压缩特性；通过干湿循环开裂试验测定开裂因子,分析其抵抗开裂变形特性.结果表明：试样水力传导系数随时间增加而下降,其中纯高岭土下降40.4%,而水泥固化后高岭土仅下降16.0%~27.1%.由于试验高岭土属于中压缩性土,试样孔隙比随荷载压力上升而下降,水泥掺量越多,...

To solve the problem of landfill liner cracking caused by high loading, the hydraulic, cracking and consolidation compression characteristics of kaolin solidified with cement are explored, and the feasibility of the solidified kaolin used as landfill liner-soil material is evaluated. The kaolin and the solidified kaolin containing 5%, 10%, 15% cement are tested in the condition of simulated cases with leachate pollution. Penetration tests are performed to evaluate hydraulic conductivity and the resistance to contaminants permeability of samples...