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Evaluating Influence of Cementation in Bentonite Buffer Material Based on the Swelling Properties of Bentonite Ore

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Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3 (ICEG 2018)

Part of the book series: Environmental Science and Engineering ((ENVENG))

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Abstract

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.

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References

  • Ogata N et al (1999) Enterprise technology for high level radioactive waste geological disposal,-volume 4. Des Manufact Proced Eng Barrier- J Nucl Fuel Cycle Environ 5(2):103–121

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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.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Waseda University, #203, Building 58, 3-4-1, Okubo, Shinjuku-Ku, Tokyo, 169-8555, Japan

    D. Ito, H. Komine, S. Morodome, T. Sekiguchi & G. Miura

Authors
  1. D. Ito
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  2. H. Komine
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  3. S. Morodome
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  4. T. Sekiguchi
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  5. G. Miura
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Corresponding author

Correspondence to D. Ito .

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Editors and Affiliations

  1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China

    Liangtong Zhan

  2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China

    Yunmin Chen

  3. Department of Civil Engineering, Monash University, Clayton, VIC, Australia

    Abdelmalek Bouazza

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Ito, D., Komine, H., Morodome, S., Sekiguchi, T., Miura, G. (2019). Evaluating Influence of Cementation in Bentonite Buffer Material Based on the Swelling Properties of Bentonite Ore. In: Zhan, L., Chen, Y., Bouazza, A. (eds) Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3. ICEG 2018. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-2227-3_12

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