Effect of thermal damage on tensile strength and microstructure of granite: a case study of Beishan, China

doi:10.1007/s40948-021-00278-x

	Effect of thermal damage on tensile strength and microstructure of granite: a case study of Beishan, China
	Wu, Yun 1,2,3; Li, Xiao-Zhao 2; Huang, Zhen 3; Wang, Ying-Chao 2,4; Deng, Long-Chuan 1
刊名	GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
	2021-08-01
卷号	7 期号:3 页码:15
关键词	High temperature Beishan granite Brazilian tensile strength Thermal damage Acoustic emission
ISSN号	2363-8419
DOI	10.1007/s40948-021-00278-x
英文摘要	The physical and mechanical properties of surrounding rock of high level radioactive waste repository are affected by the heat released by nuclide decay. In this paper, the effects of temperature on P-wave velocity, porosity and tensile strength are investigated, the microstructure of the specimens with different temperature is observed utilizing a polarizing microscope. Brazilian splitting tests on the heated specimens combined with the acoustic emission technology to monitor the rock deformation and failure. It is observed that the P-wave velocity of granite decreases with the increase of temperature. The porosity of granite changes with temperature and has obvious threshold that is the porosity of granite will increase rapidly when the temperature exceeds 500 degrees C. Besides, the tensile strength of granite shows a linear decrease with the increasing temperature. The results of acoustic emission tests and thin section observations indicate that temperature leads to an increase in the closure and unstable extension of cracks. The findings of the present research can provide reference for construction safety of the rock mass subjected to high temperature.
资助项目	Innovative and creative research program for doctoral students of Nanjing University[CXCY-19-62] ; National Natural Science Foundation of China[41702326] ; Innovative Experts, Long-term Program of Jiangxi Province[jxsq2018106049] ; Natural Science Foundation of Jiangxi Province[20202ACB214006] ; Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020014]
WOS研究方向	Energy & Fuels ; Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000691220400001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27857]
专题	中科院武汉岩土力学所
通讯作者	Li, Xiao-Zhao
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210046, Jiangsu, Peoples R China 2.China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China 3.Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou 341000, Jiangxi, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yun,Li, Xiao-Zhao,Huang, Zhen,et al. Effect of thermal damage on tensile strength and microstructure of granite: a case study of Beishan, China[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2021,7(3):15.
APA	Wu, Yun,Li, Xiao-Zhao,Huang, Zhen,Wang, Ying-Chao,&Deng, Long-Chuan.(2021).Effect of thermal damage on tensile strength and microstructure of granite: a case study of Beishan, China.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,7(3),15.
MLA	Wu, Yun,et al."Effect of thermal damage on tensile strength and microstructure of granite: a case study of Beishan, China".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 7.3(2021):15.