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地学领域高质量科技期刊分级T2区（2023）

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WANG Xuchen，KE Rui，WANG Liangqing，et al. Bonding performance of anchor-mortar interface under multifactor action based on electrochemical impedance analysis[J]. Bulletin of Geological Science and Technology，2025，44（0）：1-10 doi: 10.19509/j.cnki.dzkq.tb20230622
Citation: WANG Xuchen，KE Rui，WANG Liangqing，et al. Bonding performance of anchor-mortar interface under multifactor action based on electrochemical impedance analysis[J]. Bulletin of Geological Science and Technology，2025，44（0）：1-10 doi: 10.19509/j.cnki.dzkq.tb20230622
shu

Bonding performance of anchor-mortar interface under multifactor action based on electrochemical impedance analysis

doi: 10.19509/j.cnki.dzkq.tb20230622

  • Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China

More Information
  • Author Bio:

    E-mail：wxc1834@126.com

  • Corresponding author: E-mail：wlq027@126.com
  • Received Date: 06 Nov 2023
  • Accepted Date: 18 Jan 2024
  • Rev Recd Date: 13 Jan 2024
    • Available Online: 21 Mar 2025
    Abstract
  • Objective

    There are many factors affecting the bonding performance of the anchor-mortar interface, and the current research on the bonding performance of the interface focuses on the influence of a single factor, while the research on the bonding performance of the interface under the action of multiple factors still leaves a gap.

    Methods

    In this paper, we take the anchor-mortar as the research object, using electrochemical impedance spectroscopy to obtain the state of the anchor-mortar interface and electrochemical parameters under different influencing factors, obtain the bond strength of the anchor-mortar interface through the pullout test, and combines the electrochemical parameters to investigate the relationship between the electrochemical parameters and the pullout load when the specimen maintenance is completed and analyses the influence of the three factors on the bonding performance of the interface between the anchor-mortar.

    Results

    The sensitivity analysis of orthogonal test shows that the pull-out load of the specimen is mainly controlled by the diameter of the anchor rod, the pore solution resistance (Rs) is mainly controlled by the water-cement ratio, and there is no obvious controlling factor for the charge transfer resistance (Rct); at the early stage of specimen maintenance, under the influence of the three factors, there will be two kinds of states of the anchor-mortar interface, namely, complete passivation film and incomplete passivation film. The results of the study show that, within the range chosen for the test, the pullout load increases with the increase of fine sand particle size and the decrease of water-cement ratio, and the pullout load of the specimen is positively correlated with the pore solution resistance (Rs) and charge transfer resistance (Rct).

    Conclusion

    The research results are of great significance for the validation of the effectiveness of anchored structural mortar proportioning and application.

     

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