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Microwave Heating Healing of Asphalt Mixture with Coal Gangue Powder and Basalt Aggregate

Author

Listed:
  • Bin Zhang

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China)

  • Xu Gao

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China)

  • Shi Xu

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
    Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
    Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China)

  • Xinkui Yang

    (State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China)

  • Qin Tian

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China)

  • Jiayi Liu

    (School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China)

Abstract

Microwave heating is an effective method to achieve autonomic crack healing in asphalt mixtures, and the use of microwave-absorbing materials can largely improve this healing efficiency. As a solid waste, coal gangue contains metal oxides, which shows the possibility of microwave heating. In order to further promote the application of coal gangue in the microwave healing of asphalt mixtures, this study looks into the synergistic effect of basalt and coal gangue powder (CGP) on the microwave heating self-healing of an asphalt mixture. The mechanical performance, water stability, low-temperature crack resistance and microwave healing efficiency of the asphalt mixture were investigated using the immersion Marshall test, standard Marshall test, Cantabro test and semi-circular bending (SCB), and healing tests, respectively. The results indicated that the addition of CGP in asphalt mixture can improve the microwave heating speed, which also showed a significant advantage in water stability and fracture energy recovery. The research results will further promote the utilization rate of coal gangue.

Suggested Citation

  • Bin Zhang & Xu Gao & Shi Xu & Xinkui Yang & Qin Tian & Jiayi Liu, 2023. "Microwave Heating Healing of Asphalt Mixture with Coal Gangue Powder and Basalt Aggregate," Sustainability, MDPI, vol. 15(17), pages 1-15, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:17:p:12986-:d:1227580
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