| Issue |
E3S Web Conf.
Volume 642, 2025
5th European Conference on Unsaturated Soils and Biotechnology applied to Geotechnical Engineering (EUNSAT2025 + BGE)
|
|
|---|---|---|
| Article Number | 04003 | |
| Number of page(s) | 6 | |
| Section | EUNSAT2025 - Studies on Coupled Phenomena | |
| DOI | https://doi.org/10.1051/e3sconf/202564204003 | |
| Published online | 14 August 2025 | |
Investigation of the Strength Characteristics of Various Bentonites under Different Temperature and Saturation Conditions
1 Niigata University, Graduate School of Science and Technology Department of Environmental Science, 8050 Ikarashi 2-no-cho Nishi-ku Niigata 950-2181, Japan
2 Niigata University, Civil Engineering Program Faculty of Engineering, 8050 Ikarashi 2-no-cho Nishi-ku Niigata 950-2181, Japan
3 Tottori University, Dept of Social Systems and Civil Enginnering Faculty of Engineering, 4-10l Koyama-cho Minami, Tottori, 680-8550, Japan
* Corresponding author: author@e-mail.org
In the geological disposal of high-level radioactive waste, bentonite is a key buffer material due to its swelling capability and low permeability. To ensure long-term safety, its properties, particularly uniaxial compressive strength, must be evaluated. After waste emplacement, the buffer is exposed to high temperatures from decay heat and potential groundwater intrusion. Understanding the thermal effects on bentonite performance is crucial, yet studies remain limited. This study conducted uniaxial compression tests on various Japanese bentonites with different origins and characteristics, considering temperature and saturation. The results showed that, regardless of bentonite type, compressive strength decreased under thermal effects. These findings contribute to a database and provide a reference for selecting engineered barrier materials in geological disposal.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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