Evaluating influence of cementation in bentonite buffer material based on the swelling properties of bentonite ore

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationProceedings of the 8th International Congress on Environmental Geotechnics Volume 3 - Towards a Sustainable Geoenvironment
EditorsLiangtong Zhan, Yunmin Chen, Abdelmalek Bouazza
PublisherSpringer Berlin Heidelberg
Pages97-104
Number of pages8
ISBN (Print)9789811322266
DOIs
Publication statusPublished - 2019 Jan 1
Event8th International Congress on Environmental Geotechnics, ICEG 2018 - Hangzhou, China
Duration: 2018 Oct 282018 Nov 1

Publication series

NameEnvironmental Science and Engineering
ISSN (Print)1863-5520
ISSN (Electronic)1863-5539

Conference

Conference8th International Congress on Environmental Geotechnics, ICEG 2018
CountryChina
CityHangzhou
Period18/10/2818/11/1

Keywords

  • Bentonite
  • Cementation
  • Long-term alteration
  • Radioactive waste
  • Swelling

ASJC Scopus subject areas

  • Information Systems
  • Environmental Engineering

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  • Cite this

    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 L. Zhan, Y. Chen, & A. Bouazza (Eds.), Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3 - Towards a Sustainable Geoenvironment (pp. 97-104). (Environmental Science and Engineering). Springer Berlin Heidelberg. https://doi.org/10.1007/978-981-13-2227-3_12