Thermo-hydric analysis of concrete–rock bilayers under fire conditions

Investigation of pore structure evolution and damage characteristics of high temperature rocks subjected to liquid nitrogen cooling shock

“…Thermal cracking affects properties of rocks, which is considered in a range of underground engineering applications in high-temperature environments, such as energy exploitation of traditional geothermal (Fleuchaus et al, 2018;Ranjith et al, 2012), energy extraction of hot dry rock (HDR) (Breede et al, 2013;Olasolo et al, 2016), disposal of high-level radioactive waste (Kumari et al, 2017;Miao et al, 2020), engineering fire and underground coal fire (Ferreira et al, 2014;Freire-Lista et al, 2016;Yin et al, 2022), underground coal gasification (UCG) (Otto and Kempka, 2015;Perkins, 2018), and enhanced oil recovery (Egboga et al, 2017;Jin et al, 2019a). High temperature may induce thermal stress and additional stress due to (1) mismatch of mineral thermal expansion, (2) thermal expansion anisotropy within individual minerals, (3) aÀb transition of quartz at a specific temperature, and (4) thermal gradient formed by a sharp variation in temperature (Collin and Rowcliffe, 2000;Glover et al, 1995;Jiang et al, 2022;Jin et al, 2019b;Richter and Simmons, 1974).…”

Application of Machine Learning and Multivariate Statistics to Predict Uniaxial Compressive Strength and Static Young’s Modulus Using Physical Properties under Different Thermal Conditions

“…Previous research shows that rocks' physical and mechanical properties are significantly affected by increasing thermal conditions due to the alteration of mineral composition and intergrain bonding [14][15][16]. Furthermore, the high temperature can cause a thermal expansion in the rock-forming mineral, inducing thermal stress in the rock resulting in the development of micro-cracks and propagating the existing cracks and length [15,[17][18][19][20][21][22][23][24].…”

Effect of Thermal Environment on the Mechanical Behaviors of Building Marble

“…In the civil engineering, the mechanical behaviors of building rock are also a ected by the thermal environment in the process of re disaster [15][16][17]. Existing studies involving the heat treatment of rock indicate that the e ect on the thermal environment is limited.…”