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Article

An Experimental Study on the Physical and Mechanical Properties of Granite after High-Temperature Treatment Considering Anisotropy

1
School of Engineering and Technology, China University of Geosciences (Beijing), Xueyuan Road 29, Beijing 100083, China
2
Engineering and Technology Innovation Center for Risk Prevention and Control of Major Project Geosafety, MNR, Xueyuan Road 29, Beijing 100083, China
3
Beijing Jingneng Geological Engineering Co., Ltd., 36 Mentougou Road, Mentougou District, Beijing 102300, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2024, 14(13), 5585; https://doi.org/10.3390/app14135585
Submission received: 5 June 2024 / Revised: 24 June 2024 / Accepted: 24 June 2024 / Published: 27 June 2024
(This article belongs to the Special Issue Effects of Temperature on Geotechnical Engineering)

Abstract

The deep burial disposal of nuclear waste and dry hot rock mining relates to the effects of high temperatures on the physical and mechanical properties of granite. Previous studies have shown that due to the anisotropy of mineral arrangements during granite formation, the physical and mechanical properties of granite vary greatly with different temperatures. We conducted wave velocity tests, optical mirror tests, and uniaxial and conventional triaxial compression tests on granite in three orthogonal directions before and after high-temperature treatment. The main innovative conclusions are as follows: (1) High temperatures can cause the density of thermal cracks in the cross-section of granite, which varies with different sampling directions. Temperatures below 400 °C increase the anisotropy of granite, and there are obvious advantages in the development direction. (2) Under the same temperature conditions, granite samples taken parallel to the dominant direction of cracks exhibit the best mechanical properties. (3) In uniaxial compression tests, granite samples after high-temperature treatment are mostly subjected to tensile splitting failure. When the heating temperature is higher than 400 °C, a large number of transgranular cracks are generated during the thermal damage of granite at this temperature stage. Rock samples taken perpendicular to the dominant direction of the crack can generate radial cracks near the main failure surface, while rock samples taken parallel to the dominant direction of the crack can generate more axial cracks.
Keywords: granite; physical and mechanical properties; heat damage; anisotropy; microstructure granite; physical and mechanical properties; heat damage; anisotropy; microstructure

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MDPI and ACS Style

Qin, Y.; Wu, L.; Wu, Q.; Xu, N.; Cai, G.; Guo, Y.; Zhou, W. An Experimental Study on the Physical and Mechanical Properties of Granite after High-Temperature Treatment Considering Anisotropy. Appl. Sci. 2024, 14, 5585. https://doi.org/10.3390/app14135585

AMA Style

Qin Y, Wu L, Wu Q, Xu N, Cai G, Guo Y, Zhou W. An Experimental Study on the Physical and Mechanical Properties of Granite after High-Temperature Treatment Considering Anisotropy. Applied Sciences. 2024; 14(13):5585. https://doi.org/10.3390/app14135585

Chicago/Turabian Style

Qin, Yan, Linqing Wu, Qiong Wu, Nengxiong Xu, Guanjun Cai, Yuxi Guo, and Wenjing Zhou. 2024. "An Experimental Study on the Physical and Mechanical Properties of Granite after High-Temperature Treatment Considering Anisotropy" Applied Sciences 14, no. 13: 5585. https://doi.org/10.3390/app14135585

APA Style

Qin, Y., Wu, L., Wu, Q., Xu, N., Cai, G., Guo, Y., & Zhou, W. (2024). An Experimental Study on the Physical and Mechanical Properties of Granite after High-Temperature Treatment Considering Anisotropy. Applied Sciences, 14(13), 5585. https://doi.org/10.3390/app14135585

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