ULTRASONIC VELOCITIES MEASUREMENT IN COMPACTED BENTONITE-SAND MIXTURES FOR SATURATION LEVEL EVALUATION

被引：0
|
作者：
Kimura, Shun [1 ]
Takahashi, Hideharu [2 ]
Hamdani, Ari [2 ]
Aritomi, Masanori [2 ]
Ozaki, Susumu [3 ]
Kikura, Hiroshige [2 ]
机构：
[1] Tokyo Inst Technol, Dept Nucl Engn, Meguro Ku, N1-7 Ookayama, Tokyo 1528550, Japan
[2] Tokyo Inst Technol, Lab Adv Nucl Energy, Meguro Ku, N1-7 Ookayama, Tokyo 1528550, Japan
[3] OCL Corp, Minato Ku, Tokyo 1050012, Japan
来源：
PROCEEDINGS OF THE 26TH INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING, 2018, VOL 7 | 2018年
关键词：
Geological disposal; bentonite; ultrasound; elastic properties;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Compacted bentonite materials are often considered as a buffer material in the geological radioactive waste disposal. This bentonite is expected to fill up the space between the waste and the surrounding ground by swelling. Therefore, understanding the surrounding ground, i.e., groundwater behavior in bentonite, as a buffer material, is essential in order to evaluate the bentonite buffer performance and guarantee long-term safety. The monitoring system of the water saturation level in compacted bentonite is required because water content in buffer material may influence its elastic properties. In this study, the correlation between water content and elasticity in unsaturated compressed bentonite was experimentally evaluated. The evaluation was done by measuring the sound velocity of both longitudinal wave and transverse wave. As a result, it can be confirmed that ultrasonic velocities could evaluate a degree of saturation and bulk modulus of compacted bentonite.
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页数：7
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