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Changes of physical properties of thermal damaged sandstone with time lapse


Understanding the change of physical properties of thermal damaged rock with time lapse in high temperature engineering plays an important role in the prediction of engineering life and the prevention of engineering disasters. In order to study the effect of time lapse on the physical properties of heat damaged sandstone, the sandstone was heated to the target temperature and cooled, and its resistivity, Leeb hardness, volume and mass were measured. The values of these parameters should be measured again after placing the thermally damaged sandstone for 3, 6 and 9 months. The results show that, after being placed for 3 months, the quality of heat damaged sandstone increased at all test temperatures. At 200 °C, 400 °C, 600 °C and 900 °C, the resistivity of heat damaged sandstone decreases, and there is no obvious change in Leeb hardness and volume. At 800 °C, the resistivity of thermally damaged sandstone increases, the Leeb hardness decreases and the volume increases. After being placed for 6 months, the resistivity, Leeb hardness and volume of thermally damaged sandstone did not change at all test temperatures, but the mass of thermally damaged sandstone increased at 800 °C and 900 °C. After being placed for 9 months, the resistivity, Leeb hardness, volume and mass have no obvious change at all test temperatures.

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This research is supported by the National Natural Science Foundation of China (Grant No. 41807233) & the Priority Academic Program Development of Jiangsu Higher Education Institutions & the Graduate Research and Practice Innovation Program of Jiangsu Province (SJCX21-1043).

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Correspondence to Weiqiang Zhang.

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Edited by Dr. Andrzej Górszczyk (ASSOCIATE EDITOR) / Prof. Gabriela Fernández Viejo (CO-EDITOR-IN-CHIEF).

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Wang, Z., Zhang, W., Shi, Z. et al. Changes of physical properties of thermal damaged sandstone with time lapse. Acta Geophys. 70, 1193–1202 (2022).

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  • Thermal damage
  • Sandstone
  • Physical properties
  • Time lapse