Title
Microwave heating mechanism and self-healing performance of asphalt mixture with basalt and limestone aggregates
Author
Wang, Fu (Wuhan Institute of Technology)
Zhu, Hongbin (Wuhan Institute of Technology)
Shu, Benan (Foshan Transportation Science and Technology Co.)
Li, Yuanyuan (Wuhan Institute of Technology)
Gu, Dengjun (Wuhan Institute of Technology)
Gao, Y. (TU Delft Pavement Engineering) 
Chen, Anqi (Wuhan University of Technology)
Feng, Jianlin (Wuhan Institute of Technology)
Wu, Shaopeng (Wuhan University of Technology)
Date
2022
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.
Subject
Aggregates
Asphalt mixture
Basalt
Heating characteristics
Microwave heating mechanism
Self-healing performance
To reference this document use:
http://resolver.tudelft.nl/uuid:19a8ef83-67b9-4a2f-a43d-b7bbd5aa40c8
DOI
https://doi.org/10.1016/j.conbuildmat.2022.127973
Embargo date
2023-07-01
ISSN
0950-0618
Source
Construction and Building Materials, 342
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2022 Fu Wang, Hongbin Zhu, Benan Shu, Yuanyuan Li, Dengjun Gu, Y. Gao, Anqi Chen, Jianlin Feng, Shaopeng Wu, More Authors