Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (5): 154-164.doi: 10.6040/j.issn.1672-3961.0.2024.078

• Civil Engineering • Previous Articles    

Study on the effect of steel slag and steel fiber on microwave heating and pavement performance of asphalt mixture

HU Yaoyao1, ZHANG Shengtao2, XIAO Yushuai3*, SONG Shimao4, ZHANG Jizhe3   

  1. HU Yaoyao1, ZHANG Shengtao2, XIAO Yushuai3*, SONG Shimao4, ZHANG Jizhe3(1. Shandong Provincial Communications Planning and Design Institute Co., Ltd., Jinan 250101, Shandong, China;
    2. Shandong Hi-Speed Group Co., Ltd., Jinan 250098, Shandong, China;
    3. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China;
    4. Shandong Province Hi-Speed Maintenance Group Co., Ltd., Jinan 250032, Shandong, China
  • Published:2025-10-17

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Abstract: In response to the problem of unclear patterns of the influence of induced materials on the microwave heating performance of asphalt mixtures, coarse basalt and middle basalt asphalt mixture, coarse steel slag and middle steel slag asphalt mixture, coarse basalt and middle steel slag asphalt mixture, and coarse steel slag and middle basalt asphalt mixture with different dosages of steel fibers had been designed and prepared. The influence of steel slag and steel fiber on the heating rate and uniformity of asphalt mixture was studied by microwave heating test. In addition, rutting test, low-temperature bending test, water-soaked Marshall test, volumetric stability test and four-point bending fatigue test were used to evaluate the pavement performance of steel slag asphalt mixtures. The results found that steel slag significantly improved the microwave heating efficiency of asphalt mixtures, but reduced the heating uniformity. The effect of steel fiber on the microwave heating efficiency of asphalt mixtures was not obvious, and the heating uniformity showed the phenomenon of first improvement and then deterioration with the increase of steel fiber dosage. The incorporation of steel slag could improve the high and low temperature performance as well as fatigue resistance of asphalt mixtures, but it adversely affected the volume stability and water stability of the mixtures. This study preliminarily confirmed the feasibility of steel slag used as induced-heating self-healing asphalt pavement aggregate, showing promising application potential.

Key words: steel slag, asphalt mixture, steel fiber, microwave heating, warming uniformity, durability

CLC Number: 

  • U414
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