Density changes and sealing performance of damaged compacted bentonite

机译：损坏的密实膨润土的密度变化和密封性能

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Compacted bentonite is planned for use as a buffer material in the geological disposal of highlevelrnradioactive waste. The buffer material is required a sealing performance against a leakage of ground waterrncontaminated by radioactivity. In the present paper, density changes and sealing performance of damagedrncompacted bentonite due to shear failure are studied. A series of constant volume direct shear tests was performedrnto observe the failure behavior of both unsaturated and saturated compacted bentonite. The insides ofrnsheared specimens were observed with a micro-focus X-ray CT scanner in order to grasp the density change.rnAccording to the results of the X-ray CT observation, no shear bands or cracks were generated in the saturatedrnspecimen, and no density change was also confirmed. Furthermore, a permeability of the damaged compactedrnbentonoite does not significant change due to the shear failure.

机译：计划将压缩膨润土用作高放射性放射性废物地质处置的缓冲材料。需要缓冲材料具有密封性能，以防止被放射性污染的地下水泄漏。研究了由于剪切破坏而致密的膨润土的密度变化和密封性能。进行了一系列恒定体积直接剪切试验，以观察不饱和和饱和压实膨润土的破坏行为。为了掌握密度变化，用微焦点X射线CT扫描仪观察了切变试样的内部。根据X射线CT观察的结果，在饱和试样中没有产生剪切带或裂纹，没有密度。更改也得到确认。此外，由于剪切破坏，损坏的压实膨润土的渗透率没有显着变化。

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来源
《Soil mechanics and geotechnical engineering: Challenges and solutions》|2011年|p.1-6|共6页
会议地点 Hong Kong(HK)
作者
T. Kodaka; T. Hirate; Y. Motoyama; Y. Teramoto;
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作者单位

Department of Civil Engineering, Meijo University, Japan;

Department of Civil Engineering, Meijo University, Japan;

Department of Civil Engineering, Meijo University, Japan;

Central Consultant Inc., Japan;

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原文格式 PDF
正文语种 eng
中图分类地质、矿产普查与勘探;
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1. Effect of gas pressure on the sealing efficiency of compacted bentonite-sand plugs [J] . J.F. Liu, C.A. Davy, J. Talandier, Journal of Contaminant Hydrology . 2014,第deca期

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2. Compacted bentonite as a source of substrates for sulfate-reducing microorganisms in a simulated excavation-damaged zone of a spent nuclear fuel repository [J] . Maanoja Susanna, Lakaniemi Aino-Maija, Lehtinen Leena, Applied clay science . 2020,第Octa期

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3. Investigation on gas permeability of compacted GMZ bentonite with consideration of variations in liquid saturation, dry density and confining pressure [J] . Journal of Contaminant Hydrology . 2020,第Mara期

机译：考虑液体饱和度，干密度和围压变化的压实GMZ膨润土透气性研究
4. Density changes and sealing performance of damaged compacted bentonite [C] . T. Kodaka, T. Hirate, Y. Motoyama, Asian regional conference on soil mechanics and geotechnical engineering . 2011

机译：损坏压实膨润土的密度变化和密封性能
5. Sealing performance assessments of bentonite and bentonite/crushed rock plugs [D] . Ouyang, Shoung 1990

机译：膨润土和膨润土/碎石塞的密封性能评估
6. Stability of Microbial Community Profiles Associated with Compacted Bentonite from the Grimsel Underground Research Laboratory [O] . Katja Engel, Sian E. Ford, Sara Coyotzi, 2019

机译：来自格里姆瑟尔地下研究实验室的压实膨润土相关的微生物群落特征的稳定性
7. Hydro-mechanical behaviour of compacted bentonite-sand mixture used as sealing materials in radioactive waste disposal [O] . Saba Simona, Wang Q., Tang Anh Minh, 2011

机译：压实膨润土-砂混合物作为放射性废物处理中的密封材料的水-力学行为
8. Sealing Performance of Bentonite and Bentonite/Crushed Rock Borehole Plugs [R] . Ouyang, S., Daemen, J. J. K. 1992

机译：膨润土和膨润土/碎石钻孔塞的密封性能

Density changes and sealing performance of damaged compacted bentonite

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