Evolution of thermal cracking, temperature distribution and deformation at mineral scale of Beishan granite during heating and cooling
文献类型：期刊论文
| 作者 | He, Qi; Chen, Shiwan; Wang, Guibin; Zuo, Shuangying; Yang, Fubo |
| 刊名 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 144 |
| ISSN号 | 0735-1933 |
| 关键词 | Thermal cracking Acoustic emission Granite Image processing Nuclear magnetic resonance |
| 英文摘要 | Thermo-mechanical property of rock is of great importance for the long-term safety of the high-level radioactive waste (HLW) geological disposal engineering. Thermal cracking, temperature and meso-deformation on the mineral grain size scale of Beishan granite were investigated during heating (160 degrees C - 200 degrees C) and cooling process using online temperature, deformation and acoustic emission monitoring system. During the heating process, the temperature difference in different mineral grain was evident that the highest temperature was observed in feldspar while lower temperature in quartz and mica, and the temperature difference reached 20%. Meanwhile the feldspar expanded as the quartz and mica being compressed during heating. During the temperature holding and cooling process, the temperature difference between different mineral grain reduced and stabilized around 5%. The thermal induced expansion was recovered gradually but irreversible deformation was left, which also demonstrated by the nuclear magnetic resonance measurement that size and volume of large pore in granite both decreased after heated. The thermal cracking emerged from 25 degrees C - 35 degrees C, and the thermal cracking activity was active once temperature changed during heating and cooling stage, which was calm during temperature holding stage. In addition, the cracking process was investigated by numerical modelling. The 'confining pressure effect' was observed during heating process, and the mechanism of thermal strengthening effect was discussed. Overall, the mild high temperature caused by decay heat of HLW could play positive role for the long-term safety of the repository, since the tightness and strength could be both enhanced by mild high temperature. |
| 学科主题 | Thermodynamics ; Mechanics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000982003100001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34888]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guizhou University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | He, Qi,Chen, Shiwan,Wang, Guibin,et al. Evolution of thermal cracking, temperature distribution and deformation at mineral scale of Beishan granite during heating and cooling[J]. INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER,2023,144. |
| APA | He, Qi,Chen, Shiwan,Wang, Guibin,Zuo, Shuangying,&Yang, Fubo.(2023).Evolution of thermal cracking, temperature distribution and deformation at mineral scale of Beishan granite during heating and cooling.INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER,144. |
| MLA | He, Qi,et al."Evolution of thermal cracking, temperature distribution and deformation at mineral scale of Beishan granite during heating and cooling".INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 144(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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