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Thermal degradation study of Westerly granite by ultrasonic sounding and mercury porosimetry
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SYSNO ASEP 0576926 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Thermal degradation study of Westerly granite by ultrasonic sounding and mercury porosimetry Author(s) Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Petružálek, Matěj (GLU-S) RID, SAI, ORCID
Aminzadeh, Ali (GLU-S)
Řimnáčová, Daniela (USMH-B) ORCID, SAI
Přikryl, R. (CZ)Source Title Proceedings of the ISRM 15th International Congress on Rock Mechanics and Rock Engineering & 72nd Geomechanics Colloquium – Challenges in Rock Mechanics and Rock Engineering. - Salzburg : Austrian Society for Geomechanics, 2023 / Schubert W. ; Kluckner A. - ISBN 978-3-9503898-3-8 Pages s. 2607-2612 Number of pages 6 s. Publication form Online - E Action International ISRM Congress 2023 /15./ Event date 09.10.2023 - 14.10.2023 VEvent location Salzburg Country AT - Austria Event type WRD Language eng - English Country AT - Austria Keywords Granite ; Thermal degradation ; Porosity ; Ultrasonic sounds OECD category Environmental and geological engineering, geotechnics R&D Projects GA21-26542S GA ČR - Czech Science Foundation (CSF) Institutional support GLU-S - RVO:67985831 ; USMH-B - RVO:67985891 Annotation Westerly granite (WG) is a well-known rock, believed to be isotropic. We studied WG samples heated between 100°C and 800°C, by ultrasonic sounding (US), mercury intrusion porosimetry (MIP). Thermal treatment studies are important for localities like nuclear waste storages, geothermal projects, rocks and earthquake mechanics. All measurements were done at room temperature. It was found that P and S US wave velocity, amplitude, frequency and elastic modulus decreased more than 60% as a result of thermal rock material disintegration due to the increased temperature treatment. Image analyses showed that there is also a preferred orientation of microcracks regardless of their size and thermal treatment level. MIP showed that the pore size distributions vary with different heating temperatures in depending on the thermal WG treatment. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2024
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