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Volume 46 Issue S2
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YANG Gaosheng, BAI Bing, CHEN Wenxuan, MAO Haitao, LIU Zhonghua, LAN Xiaoling. Experimental study on heat conduction and water migration of composite bentonite samples[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 161-165. DOI: 10.11779/CJGE2024S20024
Citation: YANG Gaosheng, BAI Bing, CHEN Wenxuan, MAO Haitao, LIU Zhonghua, LAN Xiaoling. Experimental study on heat conduction and water migration of composite bentonite samples[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 161-165. DOI: 10.11779/CJGE2024S20024
shu

Experimental study on heat conduction and water migration of composite bentonite samples

  • 1.

    College of Urban and Rural Construction, Shanxi Agricultural University, Taiyuan, Shanxi 030031, China

  • 2.

    School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China

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  • Received Date: June 20, 2024
    Graphical Abstract
    • Abstract
  • The joints of composite blocks of buffer materials as potential weak parts in the engineering barrier system of high-level radioactive waste (HLW) repository must be studied in depth. Therefore, the evolution of temperature and volumetric water content with time at different locations of Gaomiaozi (GMZ) composite bentonite samples before and after simulated water inflow is measured by using the developed experimental devices. According to the experimental results, the thermal conductivity and hydraulic conductivity of the joint location after healing of composite samples are obtained. The experimental results show that the change of the internal temperature of the composite bentonite samples is mainly affected by the temperature boundary, and the change of the internal water has small effects on it. In a short period of time, the loading of hydraulic boundary conditions only makes the volumetric water content of the soil near the hydraulic boundary increase significantly, but has small effects on other locations. Affected by the temperature boundary, the volumetric water content of the soil near the temperature boundary gradually decreases with time. The thermal conductivity and permeability of the joint location after healing can meet the requirements of the engineering barrier of the HLW repository.
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    • References (15)
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