Microwave heating mechanism and self-healing performance of asphalt mixture with basalt and limestone aggregates

Journal article (2022)

Authors

Fu Wang Wuhan Institute of Technology
Hongbin Zhu Wuhan Institute of Technology
Benan Shu Foshan Transportation Science and Technology Co.
Yuanyuan Li Wuhan Institute of Technology
Dengjun Gu Wuhan Institute of Technology
Y. Gao Pavement Engineering - CEG
Anqi Chen Wuhan University of Technology
Jianlin Feng Wuhan Institute of Technology
Shaopeng Wu Wuhan University of Technology
More Authors... External organisation
Research Group
Pavement Engineering (CEG) (TU Delft)
Copyright: © 2022 Fu Wang, Hongbin Zhu, Benan Shu, Yuanyuan Li, Dengjun Gu, Y. Gao, Anqi Chen, Jianlin Feng, Shaopeng Wu, More Authors
DOI: https://doi.org/10.1016/j.conbuildmat.2022.127973
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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Pavement Engineering

Abstract

Traditional asphalt mixtures can't absorb microwave energy efficiently, which limits the development of microwave heating technology in the field of road maintenance. Based on the microwave heating characteristics of basalt aggregates, the overall microwave self-healing rate of the asphalt mixture can be enhanced. The basalt was tested by XRF, XPS, XRD and electromagnetic parameters to reveal its microwave heating mechanism. Through the heating rate test, SCB test and fatigue test of asphalt mixture, its heating characteristics, flexural strength, fatigue resistance and self-healing performance were studied. The results showed that the excellent wave-absorbing properties of basalt are highly correlated with the elements of Si, Fe and Al. Its TanδM was slightly larger than TanδE, which indicated that basalt can absorb microwave energy through dielectric loss and magnetic loss. The aggregate type and particle size both affected the microwave heating rate of the aggregates. After microwave heating, the flexural strength and fatigue resistance of asphalt mixture with basalt and limestone aggregates can recover at least 65% and 23% respectively.

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