Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature

Dong, Zhongqi; Chen, Yanpeng; Wang, Xinggang; Kong, Ling‐Bin; Wang, Lianguo; Li, Xinning; Sun, Fenjin; Ding, Ke; Wu, Hanqi; Chen, Shanshan; Zhang, Mengyuan

doi:10.3390/ma15238692

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…The physical and mechanical behaviour, fracture, damage, and evolution processes of geomaterials under various environmental and mechanical conditions, such as thermal, mechanical, chemical, and electrical environments [6][7][8][9][10][11][12][13][14][15][16][17]20,21].…”

Section: Short Description Of the Articles Presented In This Special ...mentioning

confidence: 99%

“…Dong et al [21] conducted thermophysical and mechanical experiments on sandstone samples at temperatures ranging from room temperature to 1000 • C. The thermophysical properties of sandstone following a high-temperature treatment and the temperaturedependent changes in mechanical properties were analysed. The results indicate that as the temperature increases, the specific heat capacity and thermal expansion coefficient of sandstone samples subjected to a high-temperature treatment first increase and then diminish, while the thermal conductivity decreases gradually.…”

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Special Issue: Advancement of Functionalized Mineral Materials and Rock

Chen

Fernández-Steeger

2023

Materials

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Section: Short Description Of the Articles Presented In This Special ...mentioning

confidence: 99%

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Special Issue: Advancement of Functionalized Mineral Materials and Rock

Chen

Fernández-Steeger

2023

Materials

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“…The change trend with temperature of the uniaxial compressive strength of sandstone can be divided into three types, as shown in Figure 14b: ➀ The uniaxial compressive strength of sandstone at temperatures below 400 °C increases with temperature, and when the temperature rises to 600 °C, the strength of sandstone decreases (as shown in this paper for β = 0° sandstone). ➁ Under heating conditions of 200 °C, the uniaxial compressive strength of sandstone is obviously improved, and the strength gradually decreases with σ relationship between σ c and temperature [33][34][35][36][37][38]; (c) relationship between normalized E and temperature [8,32,37,38].…”

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confidence: 99%

“…Figure 14. (a) Relationship between normalized vp and temperature[13,[31][32][33]; (b) normalization σ relationship between σc and temperature[33][34][35][36][37][38]; (c) relationship between normalized E and temperature[8,32,37,38].…”

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Experimental Study on the Effect of High Temperature on the Physical and Mechanical Properties of Sandstone with Different Bedding Angles

Qin,

Xu,

Chen

et al. 2023

Applied Sciences

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As a typical sedimentary rock, the number of beddings in the horizontal direction of sandstone is far greater than that in the vertical direction, leading to its physical and mechanical properties showing obvious anisotropy with changes in bedding angle. After high temperature exposure, bedding damage further transforms the change rule of the physical and mechanical properties of sandstone with the bedding angle. This study tested the appearance, wave velocity, uniaxial compression, and conventional triaxial compression properties of sandstone with five bedding angles before and after high temperature exposure. The results show that (1) the longitudinal wave velocity, shear wave velocity, elastic modulus, and cohesion decreased, while the internal friction angle increased slightly. At the same temperature, when the dip angle of sandstone was 30° or 60°, the mechanical properties were optimal, and when the dip angle was 45°, the mechanical properties were the worst. (2) High temperature increases the development degree of micropores and microfractures in the sandstone bedding plane and matrix, thus increasing the anisotropy degree of the physical and mechanical properties of sandstone with different bedding angles. (3) With increasing temperature, the rock samples gradually transitioned from brittle failure to ductile failure. Sandstone with a bedding angle of 0° presented splitting failure that vertically penetrated the bedding plane at different temperatures. Sandstone with dip angles of 30° and 40° presented shear failure that penetrated the matrix and bedding plane. A failure plane along the bedding plane appeared at the end. Sandstone with dip angles of 60° and 90° was more prone to failure along the bedding plane, showing shear failure along the bedding plane and tensile failure along the bedding plane, respectively.

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“…The majority of research discovered that after being heated to a high temperature, sandstone's peak strength and mechanical properties were dramatically decreased Zhang et al, 2017). (Dong et al, 2022) investigated the changes in physical and mechanical characteristics of sandstone following temperature treatments ranging from ambient temperature to 1000°C. The results revealed that the peak strength of sandstone increased and then fell with rising temperature, the modulus of elasticity decreased, and the peak strain increased at an accelerated pace in the experimental temperature range.…”

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confidence: 99%

Multi‑scale Experimental Investigations on the Deterioration Mechanism of Sandstone after high-temperature treatment

Zhang,

Song,

Ren

et al. 2023

Preprint

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With the continuous construction and development of deep engineering, in order to study the macro-damage and micro-change of temperature on sandstone, this paper conducts a series of Uniaxial Compressive Strength (UCS) tests, Acoustic Emission (AE) monitoring and Nuclear Magnetic Resonance (NMR) experiments on white sandstone treated at 25℃, 100℃, 300℃, 500℃ and 700℃. The study shows that the peak stress of the white sandstone specimens decreases with increasing temperature, and the corresponding axial strain increases significantly. The decrease in uniaxial compressive strength and modulus of elasticity increased sharply. The brittle-ductile transition occurs at about occurs between 500°C ~ 700°C. At temperatures between 25°C and 500°C, the peak AE energy occurs near the peak strength of the sandstone. The ringing counts of the sandstone specimens reached a maximum after the peak stress when the temperature was 700°C, and the peak AE energy gradually decreased at higher heating temperatures. The T2 spectrum curve and pore size curve of the white sandstone increased and gradually shifted to the right with the increase of the treatment temperature, and the total area of the T2 spectrum and porosity also gradually increased. There is a negative correlation between porosity and total area of T2 spectrum and peak stress and elastic modulus of white sandstone under high temperature. The micropores showed a monotonically decreasing trend with increasing temperature, the mesopores showed a trend of decreasing, then increasing, and finally decreasing, and the macropores-cracks enlarged the most.

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Evaluation of Thermophysical and Mechanical Properties of Sandstone Due to High-Temperature

Cited by 11 publications

References 29 publications

Special Issue: Advancement of Functionalized Mineral Materials and Rock

Special Issue: Advancement of Functionalized Mineral Materials and Rock

Experimental Study on the Effect of High Temperature on the Physical and Mechanical Properties of Sandstone with Different Bedding Angles

Multi‑scale Experimental Investigations on the Deterioration Mechanism of Sandstone after high-temperature treatment

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