Experimental study on thermo-mechanical properties of Beishan granite under mild temperature

被引:13
作者
Tian, Yunlei [1 ]
Chen, Shiwan [1 ,2 ]
Zuo, Shuangying [1 ,2 ]
Yang, Fubo [1 ]
He, Qi [1 ]
Zheng, Kexun [3 ]
机构
[1] Guizhou Univ, Coll Resources & Environm Engn, Guiyang 50025, Peoples R China
[2] Guizhou Univ, Key Lab Karst Georesources & Environm, Minist Educ, Guiyang 50025, Peoples R China
[3] Hydrochina Guiyang Engn Corp Geotech Engn Ltd, Guiyang 550081, Guizhou, Peoples R China
基金
中国国家自然科学基金;
关键词
Thermal healing; Acoustic emission; Load/unload response ratio (LURR); Felicity ratio (FR); MECHANICAL-PROPERTIES; ACOUSTIC-EMISSION; THERMAL-DAMAGE; TENSILE-STRENGTH; FG PLATES; BEHAVIOR; ROCK; PERMEABILITY; POROSITY; CRACKING;
D O I
10.1016/j.csite.2022.102271
中图分类号
O414.1 [热力学];
学科分类号
摘要
Temperature is believed to have an important influence on the mechanics behavior of granite. To investigate thermo-mechanical properties of Beishan granite, the host rock of China's preselected underground laboratory of high-level radioactive waste (HLW) geological repository, mechanical tests including uniaxial compression test and incremental cyclic loading-unloading test under mild temperature range (mom temperature to 300 degrees C) were carried out with Acoustic emission (AE) activity monitoring. Results show: (1) The temperature threshold for Beishan granite is 150 degrees C. The UCS (uniaxial compressive strength) is increasing and pore is healing with increasing temperature in the range of room temperature to 150 degrees C, while the UCS is decreasing and pore is enlarging with increasing temperature in the range of 150 degrees C-300 degrees C. (2) The cracking activity in the compression process is significantly influenced by the ambient temperature. The AE activity of Beishan granite under different temperature exhibits three patterns (inactive-active for granite under room temperature, active-inactive-active under 60 degrees C-150 degrees C, active-inactive for granite under 200 degrees C and 300 degrees C). (3) Results of incremental cyclic loading-unloading compression tests show that the peak stress, peak strain and AE energy of granite increase with the elevated temperature. The strength and ductility are enhanced with increasing temperature in the mild range. (4) AE activity during the incremental cyclic loading-unloading test is used for loading-unloading response ratio (LURR) and felicity ratio (FR) analysis. The LURR value keeps increasing before pre-failure stress under lower temperature, but shows decrease trend before failure under higher temperature. The stress corresponding to the sharp drop on FR is identified as the stress threshold for rock damage, which are 0.57.7, to 0.66.7, for Beishan granite under the mild temperature conditions. This work will provide support for the long-term safety assessment for the HLW geological disposal engineering.
引用
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页数:11
相关论文
共 49 条
  • [1] Investigation of different fracture modes in cement-based materials by acoustic emission
    Aggelis, D. G.
    Mpalaskas, A. C.
    Matikas, T. E.
    [J]. CEMENT AND CONCRETE RESEARCH, 2013, 48 : 1 - 8
  • [2] Influence of porosity on the hygro-thermo-mechanical bending response of an AFG ceramic-metal plates using an integral plate model
    Al-Osta, Mohammed A.
    Saidi, Hayat
    Tounsi, Abdelouahed
    Al-Dulaijan, S. U.
    Al-Zahrani, M. M.
    Sharif, Alfarabi
    Tounsi, Abdeldjebbar
    [J]. SMART STRUCTURES AND SYSTEMS, 2021, 28 (04) : 499 - 513
  • [3] Free vibration analysis of FG plates under thermal environment via a simple 4-unknown HSDT
    Attia, Amina
    Berrabah, Amina Tahar
    Bousahla, Abdelmoumen Anis
    Bourada, Fouad
    Tounsi, Abdelouahed
    Mahmoud, S. R.
    [J]. STEEL AND COMPOSITE STRUCTURES, 2021, 41 (06) : 899 - 910
  • [4] Influence of porosity on thermal buckling behavior of functionally graded beams
    Bellifa, Hichem
    Selim, Mahmoud M.
    Chikh, Abdelbaki
    Bousahla, Abdelmoumen Anis
    Bourada, Fouad
    Tounsi, Abdeldjebbar
    Benrahou, Kouider Halim
    Al-Zahrani, Mesfer Mohammad
    Tounsi, Abdelouahed
    [J]. SMART STRUCTURES AND SYSTEMS, 2021, 27 (04) : 719 - 728
  • [5] Brown D., 1993, NEW MEXICO B GEOTH R, V22, P208, DOI DOI 10.2172/10180008
  • [6] Influence of thermal damage on physical properties of a granite rock: Porosity, permeability and ultrasonic wave evolutions
    Chaki, S.
    Takarli, M.
    Agbodjan, W. P.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2008, 22 (07) : 1456 - 1461
  • [7] Chen SW, 2016, ROCK SOIL MECH, V37, P547, DOI 10.16285/j.rsm.2016.S1.071
  • [8] An experimental study of the mechanical properties of granite after high temperature exposure based on mineral characteristics
    Chen, You-Liang
    Wang, Su-Ran
    Ni, Jing
    Azzam, Rafig
    Fernandez-Steeger, Tomas Manuel
    [J]. ENGINEERING GEOLOGY, 2017, 220 : 234 - 242
  • [9] Thermo-mechanical properties of Indian and other granites
    Dwivedi, R. D.
    Goel, R. K.
    Prasad, V. V. R.
    Sinha, Amalendu
    [J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2008, 45 (03) : 303 - 315
  • [10] Thermal stress-induced microcracking in building granite
    Freire-Lista, D. M.
    Fort, R.
    Varas-Muriel, M. J.
    [J]. ENGINEERING GEOLOGY, 2016, 206 : 83 - 93