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A Numerical Investigation on the Effect of Gas Pressure on the Water Saturation of Compacted Bentonite-Sand Samples
Joint Authors
Song, Shuai-Bing
Liu, Jiangfeng
Zhang, Kai
Liu, Jian
Huang, Bing-Xiang
Cao, Xu-Lou
Skoczylas, Frédéric
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-27
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
In deep geological disposal for high-level radioactive waste, the generated gas can potentially affect the sealing ability of bentonite buffers.
There is a competition between water and gas: the former provides sealing by swelling bentonite, and the latter attempts to desaturate the bentonite buffer.
Thus, this study focused on numerically modelling the coupling effects of water and gas on the water saturation and sealing efficiency of compacted bentonite-sand samples.
Different gas pressures were applied to the top surface of an upper sample, whereas the water pressure on the bottom side of the lower sample was maintained at 4 MPa.
The results indicated that gas pressure did not significantly affect the saturation of the bentonite-sand sample until 2 MPa.
At 2 MPa, the degree of water saturation of the upper sample was close to 1.0.
As the gas pressure increased, this influence was more apparent.
When the gas pressure was 6 MPa or higher, it was difficult for the upper sample to become fully saturated.
Additionally, the lower sample was desaturated due to the high gas pressure.
This indicated that gas pressure played an important role in the water saturation process and can affect the sealing efficiency of bentonite-based buffer materials.
American Psychological Association (APA)
Liu, Jiangfeng& Song, Shuai-Bing& Liu, Jian& Huang, Bing-Xiang& Cao, Xu-Lou& Zhang, Kai…[et al.]. 2017. A Numerical Investigation on the Effect of Gas Pressure on the Water Saturation of Compacted Bentonite-Sand Samples. Geofluids،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1155940
Modern Language Association (MLA)
Liu, Jiangfeng…[et al.]. A Numerical Investigation on the Effect of Gas Pressure on the Water Saturation of Compacted Bentonite-Sand Samples. Geofluids No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1155940
American Medical Association (AMA)
Liu, Jiangfeng& Song, Shuai-Bing& Liu, Jian& Huang, Bing-Xiang& Cao, Xu-Lou& Zhang, Kai…[et al.]. A Numerical Investigation on the Effect of Gas Pressure on the Water Saturation of Compacted Bentonite-Sand Samples. Geofluids. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1155940
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155940