Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Dong, Zhen, Chen, Yanpeng, Wang, Xinggang, Kong, Lingfeng, Wang, Lianguo, Li, Xinning, Sun, Fenjin, Ding, Ke, Wu, Hanqi, Chen, Shanshan, Zhang, Mengyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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
_version_ 1784847246194376704
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
work_keys_str_mv AT dongzhen evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT chenyanpeng evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT wangxinggang evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT konglingfeng evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT wanglianguo evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT lixinning evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT sunfenjin evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT dingke evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT wuhanqi evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT chenshanshan evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature
AT zhangmengyuan evaluationofthermophysicalandmechanicalpropertiesofsandstoneduetohightemperature