| Issue |
E3S Web Conf.
Volume 642, 2025
5th European Conference on Unsaturated Soils and Biotechnology applied to Geotechnical Engineering (EUNSAT2025 + BGE)
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|---|---|---|
| Article Number | 04011 | |
| Number of page(s) | 5 | |
| Section | EUNSAT2025 - Studies on Coupled Phenomena | |
| DOI | https://doi.org/10.1051/e3sconf/202564204011 | |
| Published online | 14 August 2025 | |
Experimental investigation of coupled thermo-mechanical behaviour of Kaolin clay
Ruhr-University Bochum, Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Germany
* Corresponding author: timon.kayser@rub.de
An experimental study regarding the thermo-mechanical behaviour of a Malaysian Kaolin is presented in this paper. Mercury intrusion porosimetry (MIP) tests have been performed on compacted samples with varying initial water contents. Samples compacted at dry side of optimum showed a bi-modal pore size distribution (PSD), while samples compacted at optimum or wet side of optimum showed a mono- modal PSD. The potential of the soil for thermal collapse was evaluated using the data of the MIP tests. It was concluded that soils with a bi-modal PSD (dry of optimum) have the potential for thermal collapse while soils with a mono-modal PSD (optimum/wet of optimum) usually show a dilative behaviour. This dilative behaviour was later confirmed using the data obtained from heating saturated, highly OC samples to a desired temperature. By performing temperature controlled oedometer tests in the range of T = 20°C to T = 90°C on saturated samples it was shown that the apparent preconsolidation pressure decreases with increasing temperature. Furthermore, the influence of temperature on the compressibility was evaluated suggesting that temperature has no influence on the compression index and the swelling index while the recompression index decreases with increasing temperature.
© 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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