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Changes of physical properties of Silesian granite due to heat loading
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SYSNO ASEP 0481699 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Changes of physical properties of Silesian granite due to heat loading Author(s) Kožušníková, Alena (UGN-S) RID
Konečný, Pavel (UGN-S) RID
Plevová, Eva (UGN-S) RID, ORCID
Králová, Lucie (UGN-S)Number of authors 4 Source Title Procedia Engineering - ISRM European Rock Mechanics Symposium EUROCK 2017. - Amsterdam : Elsevier Ltd., 2017 / Koníček P. ; Souček K. ; Konečný P. - ISSN 1877-7058 Pages s. 426-433 Number of pages 8 s. Publication form Online - E Action ISRM European Rock Mechanics Symposium EUROCK 2017 Event date 20.06.2017 - 23.06.2017 VEvent location Ostrava Country CZ - Czech Republic Event type WRD Language eng - English Country NL - Netherlands Keywords granite ; temperature ; physical properties Subject RIV DB - Geology ; Mineralogy OECD category Environmental and geological engineering, geotechnics R&D Projects ED2.1.00/03.0082 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 DOI https://doi.org/10.1016/j.proeng.2017.05.200 Annotation Temperature affects both the physical and structural properties of rocks and there may even cause chemical changes of minerals. Rocks are more or less inhomogeneous material, so that during testing the same rock samples taken from one location the measured values of physical properties can vary on large scattering between test specimens. To eliminate the influence of inhomogeneity of rock, we analyzed the effect of heat loading (up to 700˚ C) on the same specimens. For this reason we have used in our research particularly non-destructive testing methods – determination of bulk density, measuring of longitudinal ultrasonic wave propagation velocity, thermal conductivity and volumetric heat capacity. Besides the physical characteristics determined in the same specimen before and after tempering gas permeability and thermal expansion untempered and tempered test specimens was determined. Hg porosity and total porosity of untempered and tempered specimens were found, too. As model material was chosen so-called Silesian granite from Nový lom quarry (Žulová pluton, Czech Republic), which has been previously tested, and over macroscopically homogeneous character the variances in the measured parameters were found. Hg and total porosity and gas permeability increase with increasing temperature. The bulk density, the ultrasonic wave propagation velocity and thermal conductivity decrease with increasing temperature. The most sensitive parameters are ultrasonic wave velocity, thermal conductivity and permeability. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2018 Electronic address http://www.sciencedirect.com/science/article/pii/S1877705817323408
Number of the records: 1