| Issue |
E3S Web of Conf.
Volume 544, 2024
8th International Symposium on Deformation Characteristics of Geomaterials (IS-Porto 2023)
|
|
|---|---|---|
| Article Number | 01027 | |
| Number of page(s) | 6 | |
| Section | Experimental Investigations From Very Small Strains to Beyond Failure - Advances in Laboratory Testing Techniques (Equipment and Procedures) | |
| DOI | https://doi.org/10.1051/e3sconf/202454401027 | |
| Published online | 02 July 2024 | |
Air permeability measurements in low porosity clayey rocks
1 The University of Newcastle, School of Engineering, Callaghan Campus, Newcastle NSW, Australia
2 Hanoi University of Civil Engineering, Vietnam (formerly at The University of Newcastle, Australia), Hanoi
3 Technical University of Catalonia, UPC, Barcelona, Spain
4 University of Technology Sydney, UTS, Sydney, Australia
* Corresponding author: Jubert.pineda@newcastle.edu.au
The paper describes the development of a high-pressure isotropic cell for studying the environmental degradation of low porosity clayey rocks. Air permeability measurements are used in this device as a tool to evaluate rock degradation in unsaturated rock specimens caused by mechanical, hydraulic and chemical paths. A modified equation, based on the air pressure decay method proposed by Yoshimi and Osterberg (1963), is presented. The proposed method is applied to an Australian clayey shale. Estimated values of air permeability are compared against those calculated using the original method which, in the case of low porosity rocks, seems to provide unrealistic values when the air pressure in the vessel decays beyond 50%.
Key words: air permeability / clayey rock / rock degradation
© The Authors, published by EDP Sciences, 2024
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