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Volume 13
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Article

Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite

by
Xiangchao Shi
1,2,*,
Leiyu Gao
1,
Jie Wu
1,
Cheng Zhu
3,
Shuai Chen
1 and
Xiao Zhuo
1
1
State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2
Key Laboratory Deep Underground Science and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
3
Department of Civil & Environmental Engineering, Rowan University, Glassboro, NJ 08028, USA
*
Author to whom correspondence should be addressed.
Energies 2020, 13(9), 2136; https://doi.org/10.3390/en13092136
Submission received: 21 January 2020 / Revised: 26 April 2020 / Accepted: 27 April 2020 / Published: 29 April 2020
(This article belongs to the Special Issue Geothermal Energy Utilization and Technologies 2020)
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Abstract

This paper aims to study the effect of cyclic heating and flowing-water cooling conditions on the physical properties of granite. Ultrasonic tests, gas measured porosity, permeability, and microscope observations were conducted on granite after thermal treatment. The results showed that the velocity of P- and S-waves decreased as the number of thermal cycles increased. The porosity increased with the number of the thermal cycles attained at 600 °C, while no apparent changes were observed at 200 and 400 °C. The permeability increased with the increasing number of thermal cycles. Furthermore, microscope observations showed that degradation of the granite after thermal treatment was attributed to a large network of microcracks induced by thermal stress. As the number of thermal cycles increased, the number of transgranular microcracks gradually increased, as well as their length and width. The quantification of microcracks from cast thin section (CTS) images supported the visual observation.
Keywords: granite; physical characteristics; cyclic; thermal treatment; water cooling granite; physical characteristics; cyclic; thermal treatment; water cooling
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MDPI and ACS Style

Shi, X.; Gao, L.; Wu, J.; Zhu, C.; Chen, S.; Zhuo, X. Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite. Energies 2020, 13, 2136. https://doi.org/10.3390/en13092136

AMA Style

Shi X, Gao L, Wu J, Zhu C, Chen S, Zhuo X. Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite. Energies. 2020; 13(9):2136. https://doi.org/10.3390/en13092136

Chicago/Turabian Style

Shi, Xiangchao, Leiyu Gao, Jie Wu, Cheng Zhu, Shuai Chen, and Xiao Zhuo. 2020. "Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite" Energies 13, no. 9: 2136. https://doi.org/10.3390/en13092136

APA Style

Shi, X., Gao, L., Wu, J., Zhu, C., Chen, S., & Zhuo, X. (2020). Effects of Cyclic Heating and Water Cooling on the Physical Characteristics of Granite. Energies, 13(9), 2136. https://doi.org/10.3390/en13092136

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