TY - GEN
T1 - Evaluating influence of cementation in bentonite buffer material based on the swelling properties of bentonite ore
AU - Ito, D.
AU - Komine, H.
AU - Morodome, S.
AU - Sekiguchi, T.
AU - Miura, G.
N1 - Funding Information:
Acknowledgement. This research was conducted with support from ‘Waseda University Grants for Special Research Project (Grant B, 2017)’. Also, we got the bentonite ore samples by the support from Dr. M. Ito (Kunimine Industries) and Kunimain Co., Ltd.
Publisher Copyright:
© Springer Nature Singapore Pte Ltd. 2019.
PY - 2019
Y1 - 2019
N2 - In geological disposal of high level radioactive waste, it is essential to start considering consolidation accompanying cementation, taking into consideration high earth pressure and solution of groundwater. For engineering application of natural analogue, the authors thought consolidated buffer material will have similar physical properties to bentonite ore. In this study, we aimed to quantitatively evaluate the influence of cementation on swelling properties. In order to achieve this aim, we focused on swelling pressure and swelling strain of bentonite, using two kinds of bentonite ore whose generation dates are different respectively. As a result, swelling pressure was decreased by approximately one order of magnitude due to the influence of cementation. In addition, the swelling strain of younger bentonite ore did not decline, but those of older bentonite ore declined about half of original whether consolidation was retained or not. Therefore, there is a possibility that the swelling deformation of buffer will decline as cementation gets stronger over the course of time.
AB - In geological disposal of high level radioactive waste, it is essential to start considering consolidation accompanying cementation, taking into consideration high earth pressure and solution of groundwater. For engineering application of natural analogue, the authors thought consolidated buffer material will have similar physical properties to bentonite ore. In this study, we aimed to quantitatively evaluate the influence of cementation on swelling properties. In order to achieve this aim, we focused on swelling pressure and swelling strain of bentonite, using two kinds of bentonite ore whose generation dates are different respectively. As a result, swelling pressure was decreased by approximately one order of magnitude due to the influence of cementation. In addition, the swelling strain of younger bentonite ore did not decline, but those of older bentonite ore declined about half of original whether consolidation was retained or not. Therefore, there is a possibility that the swelling deformation of buffer will decline as cementation gets stronger over the course of time.
KW - Bentonite
KW - Cementation
KW - Long-term alteration
KW - Radioactive waste
KW - Swelling
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U2 - 10.1007/978-981-13-2227-3_12
DO - 10.1007/978-981-13-2227-3_12
M3 - Conference contribution
AN - SCOPUS:85060661393
SN - 9789811322266
T3 - Environmental Science and Engineering
SP - 97
EP - 104
BT - Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3 - Towards a Sustainable Geoenvironment
A2 - Zhan, Liangtong
A2 - Chen, Yunmin
A2 - Bouazza, Abdelmalek
PB - Springer Berlin Heidelberg
T2 - 8th International Congress on Environmental Geotechnics, ICEG 2018
Y2 - 28 October 2018 through 1 November 2018
ER -