Innovative swelling testing techniques
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Date
2024
Publication Type
Conference Paper
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yes
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Abstract
Argillaceous and anhydritic rocks, along with rocks containing pyrite, are prone to swelling by adsorbing water, leading to an increase in volume or external pressure due to deformation constriction. This swelling behavior can have adverse effects on underground openings, potentially compromising their serviceability, and it can also pose a risk to structural safety. The swelling behavior of pure claystones (rocks without anhydrite) is well understood in the context of tunneling, with the swelling-strain relationship typically determined through oedometer tests conducted in laboratories. However, when dealing with rocks containing anhydrite, the processes associated with the anhydrite-gypsum transformation have only been partially explored. This paper summarizes previous contributions of the author and presents three new swelling testing techniques, i.e., the isotropic compression swelling test, the flexible oedometer and the thermal controlled swelling test. All these techniques were developed taken into consideration the various swelling mechanisms.
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published
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New Challenges in Rock Mechanics and Rock Engineering
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822 - 827
Publisher
CRC Press
Event
ISRM European Rock Mechanics Symposium (EUROCK 2024)
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03655 - Anagnostou, Georgios (emeritus) / Anagnostou, Georgios (emeritus)
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Is part of: 10.1201/9781003429234