气候变化领域集成服务门户(CCPortal): Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China

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DOI	10.1007/s11069-021-04647-3
	Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China
	Wu Y.; Li X.-Z.; Huang Z.; Xue S.
发表日期	2021
ISSN	0921030X
起始页码	1577
结束页码	1592
卷号	107 期号:2
英文摘要	The study of the influence of temperature on granite's physical and mechanical properties is significant to deep geotechnical engineering such as nuclear waste disposal engineering. The granite samples were taken from Beishan of Gansu Province, China, a candidate site for a high-level radioactive waste repository. In this paper, thermal damage on Beishan granite under different temperature (25 °C, 200 °C, 300 °C, 400 °C, and 500 °C) was studied to investigate the thermal effect on physical and mechanical properties. Uniaxial compression tests, ultrasonic velocity, acoustic emission (AE) monitorization and scanning electron microscope were adopted. The results showed that: (1) a temperature threshold of 300 °C was recognized, with the increasing temperature, the peak strength, P-wave velocity, and mass loss ratio of the granite decreased sharply. (2) combining with the scanning electron microscope results, the changes in the growth of thermal cracks due to the heating of granite at different elevated temperatures indicated the cracks in the rock increased and gradually formed a fractures zone eventually leading to rock failure. (3) The granite sample was a brittle splitting failure when the temperature was below 200 °C, the failure of granite sample presented shear failure once the temperature exceeded 200 °C (4) The accumulated AE counts increased when the stress reached σci(crack initiation stress) and increased significantly when the stress reached σcd(crack damage stress). The higher the temperature was, the more seriously the granite samples were damaged. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词	Acoustic emission Beishan granite High level radioactive High temperature Thermal damage
英文关键词	acoustic emission; compression; granite; high temperature; mechanical property; physical property; radioactive waste; repository; temperature effect; ultrasonics; uniaxial test; China; Gansu
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206669
作者单位	School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210046, China; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; School of Resources and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China
推荐引用方式 GB/T 7714	Wu Y.,Li X.-Z.,Huang Z.,et al. Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China[J],2021,107(2).
APA	Wu Y.,Li X.-Z.,Huang Z.,&Xue S..(2021).Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China.Natural Hazards,107(2).
MLA	Wu Y.,et al."Effect of temperature on physical, mechanical and acoustic emission properties of Beishan granite, Gansu Province, China".Natural Hazards 107.2(2021).