In case of construction of repository for radioactive waste near the coastal area, the effect of salinity of water on hydraulic conductivity as well as swelling pressure of bentonite as an engineered barrier should be considered because it is known that the hydraulic conductivity of bentonite increases and swelling pressure decreases with increasing salinity of water. Though the effect of salinity of water on hydraulic conductivity and swelling pressure of bentonite has been investigated experimentally, it is necessary to elucidate and to model the mechanism of the phenomenon because various kinds of bentonites may possibly be placed in various salinities of ground water. Thus, in this study, a model for evaluating hydraulic conductivity as well as swelling pressure of compacted bentonite is proposed considering the effect of salinity of water as follows: a) Change in number of flakes of a stack of montmorillonite because of cohesion. b) Change in viscosity of water in interlayer between flakes of montmorillonite. Quantitative evaluation method for hydraulic conductivity and swelling characteristics of several kinds of bentonites under saline water is proposed based on the model mentioned above.
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ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management
October 3–7, 2010
Tsukuba, Japan
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-5453-2
PROCEEDINGS PAPER
Modeling Hydraulic Conductivity and Swelling Pressure of Several Kinds of Bentonites Affected by Salinity of Water Available to Purchase
Yukihisa Tanaka,
Yukihisa Tanaka
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
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Takuma Hasegawa,
Takuma Hasegawa
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
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Kunihiko Nakamura
Kunihiko Nakamura
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
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Yukihisa Tanaka
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
Takuma Hasegawa
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
Kunihiko Nakamura
CRIEPI - Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan
Paper No:
ICEM2010-40013, pp. 9-18; 10 pages
Published Online:
April 5, 2011
Citation
Tanaka, Y, Hasegawa, T, & Nakamura, K. "Modeling Hydraulic Conductivity and Swelling Pressure of Several Kinds of Bentonites Affected by Salinity of Water." Proceedings of the ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2. Tsukuba, Japan. October 3–7, 2010. pp. 9-18. ASME. https://doi.org/10.1115/ICEM2010-40013
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