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Volume 43 Issue 3
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SUN Xiao-hao, MIAO Lin-chang, TONG Tian-zhi, WU Lin-yu, WANG Heng-xing. Cementation effect evaluation of MICP sand solidification via electrical resistivity[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(3): 579-585. DOI: 10.11779/CJGE202103022
Citation: SUN Xiao-hao, MIAO Lin-chang, TONG Tian-zhi, WU Lin-yu, WANG Heng-xing. Cementation effect evaluation of MICP sand solidification via electrical resistivity[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(3): 579-585. DOI: 10.11779/CJGE202103022
shu

Cementation effect evaluation of MICP sand solidification via electrical resistivity

  • 1.

    Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China

  • 2.

    China Harbour Engineering Company Limited, Beijing 100027, China

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  • Received Date: May 24, 2020
  • Available Online: December 04, 2022
    Graphical Abstract
    • Abstract
  • There is no simple and feasible method to evaluate the on-site cementation effect of microbially induced calcium carbonate precipitation (MICP). Therefore, this study uses a convenient and non-destructive electrical resistivity method to evaluate the cementation effect of MICP sand solidification. First, the relationships of resistivity of MICP-solidified sand columns and porosity, water content, and calcium carbonate (CaCO3) content are studied. The relationship between the resistivity and the unconfined compressive strength of the solidified sand column is then studied. The comprehensive parameter is proposed to represent the porosity, water content and CaCO3 content of the solidified sand column, and the relationship between the comprehensive parameter and the resistivity or strengths is studied. Finally, a resistivity model for sand column solidified by MICP is proposed. The results show that the electrical resistivity increases with the increasing porosity, and it decreases with the increasing water content and also decreases approximately linearly with the increasing CaCO3 content. The electrical resistivity also has a good correlation with its related properties. The results demonstrate that the electrical resistivity method is an effective method to evaluate the cementation effect of MICP sand solidification, which can be used in the field application.
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    • References (14)
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