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Hydration Absorption and Thermal Effects of Outcrop Porous Sandstone Based on Intelligent Experimental and Infrared Thermography Techniques

Author

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  • Nai Hao

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    Research Institute for Deep Underground Science and Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Yongliang Wang

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Hao Cheng

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Xiaochong Wu

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Yi Zhao

    (School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

Sandstones are enriched in deep energy reservoirs and also exist as outcrop rocks, where the pore characteristics of sandstone are influenced by hydration absorption and thermal effects. To study the influence of the initial temperature on the hydration absorption characteristics of outcrop porous sandstone in the Mogao Grottoes, China, an intelligent experimental device for rock hydration was used. The hydration absorption characteristics and temperature effects of sandstone were analyzed by using infrared thermography techniques to monitor the infrared radiation characteristics of the sandstone’s surface during hydration absorption. The experimental results show that the higher the initial temperature of the rock samples, the shorter the time it takes for the sandstone to absorb enough water to reach saturation. The temperature variation of sandstone with different initial temperatures was also determined; the variation in the hydration absorption of sandstone conforms to certain rules, which can be expressed by formulae containing certain parameters. The changing trend of hydration absorption in outcrop porous sandstone shows that the hydration absorption increases rapidly at first, and then the rate of increase slows down until the hydration absorption remains unchanged after saturation. The experimental technique and method provide feasible means and techniques to evaluate the hydration absorption and thermal effects of outcrop porous sandstone, for further detecting the weathering degree of rock grottoes and revealing the damage mechanisms.

Suggested Citation

  • Nai Hao & Yongliang Wang & Hao Cheng & Xiaochong Wu & Yi Zhao, 2023. "Hydration Absorption and Thermal Effects of Outcrop Porous Sandstone Based on Intelligent Experimental and Infrared Thermography Techniques," Energies, MDPI, vol. 16(22), pages 1-26, November.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:22:p:7540-:d:1278606
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