Lintao, Y, Marshall, AM, Wanatowski, D orcid.org/0000-0002-5809-0374 et al. (2 more authors) (2017) Effect of high temperatures on sandstone – a computed tomography scan study. International Journal of Physical Modelling in Geotechnics, 17 (2). pp. 75-90. ISSN 1346-213X
Abstract
The impact of high temperatures on rocks is a topic of growing importance in geotechnical engineering due to its relevance to applications such as underground nuclear fuel storage, geothermal energy resource exploration and underground coal gasification. This paper presents results from tests performed on samples of sandstone treated to a range of temperatures between 20 and 1000°C. Sandstone samples obtained from underground coal gasification trial sites in Poland were selected for the tests. Multistage triaxial tests were used to determine the mechanical properties of the samples. X-ray diffraction and thermal analyses were performed to investigate the changes in physical and chemical properties of the samples under increasing temperature. Micro-computed tomography analyses were carried out on selected samples in order to show the microstructural changes that take place as a result of the heating process. Three-dimensional characterisation of sample porosity and pore-size distribution was performed to obtain a quantitative comparison between samples subjected to different temperature treatments. The relationship between microstructure and macro-mechanical characteristics of sandstone at high temperatures is discussed. The results illustrate that the mechanical properties of sandstone are closely related to alterations of microstructure that result from increased temperatures.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ICE Publishing, all rights reserved. This is an author produced version of a paper published in International Journal of Physical Modelling in Geotechnics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | rocks/rock mechanics; strength & testing of materials; thermal effects |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Feb 2017 16:53 |
Last Modified: | 05 Jul 2018 17:17 |
Status: | Published |
Publisher: | Thomas Telford (ICE Publishing) |
Identification Number: | 10.1680/jphmg.15.00031 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:112020 |