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Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature
In this study, thermophysical and mechanical tests were conducted on sandstone samples from room temperature to 1000 °C. Based on the test results, the thermophysical properties (such as specific heat capacity, thermal conductivity, and thermal expansion coefficient) of sandstone after high-temperat...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737278/ https://www.ncbi.nlm.nih.gov/pubmed/36500189 http://dx.doi.org/10.3390/ma15238692 |
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author | Dong, Zhen Chen, Yanpeng Wang, Xinggang Kong, Lingfeng Wang, Lianguo Li, Xinning Sun, Fenjin Ding, Ke Wu, Hanqi Chen, Shanshan Zhang, Mengyuan |
author_facet | Dong, Zhen Chen, Yanpeng Wang, Xinggang Kong, Lingfeng Wang, Lianguo Li, Xinning Sun, Fenjin Ding, Ke Wu, Hanqi Chen, Shanshan Zhang, Mengyuan |
author_sort | Dong, Zhen |
collection | PubMed |
description | In this study, thermophysical and mechanical tests were conducted on sandstone samples from room temperature to 1000 °C. Based on the test results, the thermophysical properties (such as specific heat capacity, thermal conductivity, and thermal expansion coefficient) of sandstone after high-temperature treatment and the variations of mechanical properties (including peak strength, peak strain, elastic modulus, and whole stress-strain curve) with temperature were analyzed. Indeed, the deterioration law of sandstone after high-temperature treatment was also explored with the aid of a scanning electron microscope (SEM). The results show that with the increase in temperature, the specific heat capacity and thermal expansion coefficient of sandstone samples after high-temperature treatment increase first and then decrease, while the thermal conductivity gradually decreases. The range from room temperature to 1000 °C witnesses the following changes: As temperature rises, the peak strength of sandstone rises initially and falls subsequently; the elastic modulus drops; the peak strain increases at an accelerated rate. Temperature change has a significant effect on the deterioration rules of sandstone, and the increase in temperature contributes to the transition in the failure mode of sandstone from brittle failure to ductile failure. The experimental study on the thermophysical and mechanical properties of sandstone under the action of high temperature and overburden pressure has a guiding significance for the site selection and safety evaluation of UCG projects. |
format | Online Article Text |
id | pubmed-9737278 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97372782022-12-11 Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature Dong, Zhen Chen, Yanpeng Wang, Xinggang Kong, Lingfeng Wang, Lianguo Li, Xinning Sun, Fenjin Ding, Ke Wu, Hanqi Chen, Shanshan Zhang, Mengyuan Materials (Basel) Article In this study, thermophysical and mechanical tests were conducted on sandstone samples from room temperature to 1000 °C. Based on the test results, the thermophysical properties (such as specific heat capacity, thermal conductivity, and thermal expansion coefficient) of sandstone after high-temperature treatment and the variations of mechanical properties (including peak strength, peak strain, elastic modulus, and whole stress-strain curve) with temperature were analyzed. Indeed, the deterioration law of sandstone after high-temperature treatment was also explored with the aid of a scanning electron microscope (SEM). The results show that with the increase in temperature, the specific heat capacity and thermal expansion coefficient of sandstone samples after high-temperature treatment increase first and then decrease, while the thermal conductivity gradually decreases. The range from room temperature to 1000 °C witnesses the following changes: As temperature rises, the peak strength of sandstone rises initially and falls subsequently; the elastic modulus drops; the peak strain increases at an accelerated rate. Temperature change has a significant effect on the deterioration rules of sandstone, and the increase in temperature contributes to the transition in the failure mode of sandstone from brittle failure to ductile failure. The experimental study on the thermophysical and mechanical properties of sandstone under the action of high temperature and overburden pressure has a guiding significance for the site selection and safety evaluation of UCG projects. MDPI 2022-12-06 /pmc/articles/PMC9737278/ /pubmed/36500189 http://dx.doi.org/10.3390/ma15238692 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dong, Zhen Chen, Yanpeng Wang, Xinggang Kong, Lingfeng Wang, Lianguo Li, Xinning Sun, Fenjin Ding, Ke Wu, Hanqi Chen, Shanshan Zhang, Mengyuan Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title | Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title_full | Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title_fullStr | Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title_full_unstemmed | Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title_short | Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature |
title_sort | evaluation of thermophysical and mechanical properties of sandstone due to high-temperature |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737278/ https://www.ncbi.nlm.nih.gov/pubmed/36500189 http://dx.doi.org/10.3390/ma15238692 |
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