基于常规三轴试验PBFC防渗浆材破坏形态机理分析  

Destruction Foams Mechanism Analysis of PBFC Anti-seepage Slurry Based on Conventional Triaxial Experiment

作　　者：盛炎民 代国忠[1] 李书进[1,2] SHENG Yanmin;DAI Guozhong;LI Shujin(School of Civil Engineering and Architecture,Changzhou Institute of Technology,Changzhou 213032,China;China Railway Blue Flame Components Co.,Ltd.,Changzhou 213032,China)

机构地区：[1]常州工学院土木建筑工程学院,常州213032 [2]中铁蓝焰构件有限公司,常州213032

出　　处：《硅酸盐通报》2020年第1期132-136,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51678083);江苏省研究生科研与实践创新计划(SJCX17_0734)

摘　　要：以水泥和膨润土为主要材料制备一种用于垃圾填埋场防渗的聚乙烯醇改性膨润土-粉煤灰-水泥防渗浆材(PBFC防渗浆材),并采用常规三轴试验仪对硬化的PBFC防渗浆材进行试验。试验结果表明,硬化PBFC防渗浆材试块的剪切破坏主要分为典型剪切破坏、楔形剪切破坏和劈裂剪切破坏三种形态。PBFC防渗浆材的极限应变值在0.5%~1.5%范围内,且随着水泥和膨润土掺量的增加,防渗浆材试块的抗剪强度增强,但当水泥和膨润土掺量过多时,防渗浆材试块的抗剪强度有所降低。A kind of PBFC anti-seepage slurry for landfill seepage control was prepared with cement and bentonite as main materials.The hardened PBFC anti-seepage slurry was tested by conventional triaxial experiment.The experiment results show that the shear destruction of PBFC anti-seepage slurry is mainly divided into three types:typical shear destruction,wedge shear destruction and splitting shear destruction.The ultimate strain value of PBFC anti-seepage slurry is in the range of 0.5%-1.5%.The shear strength of anti-seepage grout blocks increases with the increasing of cement and bentonite content.But when the amount of cement and bentonite is too much,the shear strength of anti-seepage grout blocks decreases.

关 键 词：PBFC防渗浆材 常规三轴试验 破坏形态 抗剪强度 

分 类 号：TU43[建筑科学—岩土工程]