A preliminary study of hydro-mechanical properties for bentonite-sand mixture
A preliminary study of hydro-mechanical properties for bentonite-sand mixture
复制标题
DOI：
10.1088/1755-1315/1124/1/012111
复制
发表时间：
2023-01
期刊：
影响因子：
--
通讯作者：
T. Motoshima;S. Iso;T. Nishimura
中科院分区：
文献类型：
--
作者：
T. Motoshima;S. Iso;T. Nishimura
放射性废物是在工业、医疗、军事和研究中利用剩余电能处理放射性物质的结果。对于高放废物（HLW）、乏燃料（SF）和长寿命废物类别，在安全设计中考虑了数百个物质深处的地质处置。本研究的目的是利用钠型膨润土和钙型膨润土两种不同的膨润土-砂混合物，研究水化作用引起的膨胀压力、水力导电性和应力-应变特性对应力路径的评价。这些材料在实验室试验和地下调查中获得的许多报告中确立了水力学性能的关键特征。进行了膨胀压力试验、导水率试验和三轴压缩试验，研制的仪器可用于部分试验项目的一系列试验结果。特别值得一提的是，考虑到盐度的影响，盐浓度随盐度的增加和减少是非常有趣的，因此进一步改变了膨润土的水力导率。在对膨润土进行三轴压缩试验时，侧压力对表观黏聚力和内摩擦角等强度参数有明显的影响。
Radioactive waste is a consequence of treatment radioactive material in industrial, medical, military and research applications for remaining electrical energy. For high-level waste (HLW), spent fuel (SF) and long-lived waste categories, geological disposal at depths of much hundreds of maters is considered in safety design. This study has aim to appear that swelling pressures due to hydration effort, hydraulic conductivity and stress-strain properties associated to evaluation to stress paths using two different bentonite-sand mixture, which are Sodium type bentonite and Calcium type bentonite. These materials have key feature in hydro-mechanical properties established in many reported obtained from laboratory test and underground investigations. Swelling pressure test, hydraulic conductivity test and triaxial compression test are conducted out, and developed apparatus are useful to results for series of some testing programs. Particularly, salinity concentration with increasing and decreasing on considering salinity effort is so interesting that further changing is applied to hydraulic conductivity for bentonite. While large lateral pressures are applied the bentonite at triaxial compression test, depending on lateral pressure is obviously to strength parameters that are apparent cohesion and angle of internal friction.