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Open AccessArticle

Heating Characteristics and Induced Healing Efficiencies of Asphalt Mixture via Induction and Microwave Heating

1
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
2
National & Local Joint Engineering Laboratory for Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China
3
Zhejiang Provincial Institute of Communications Planning, Design & Research, Hangzhou 310015, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 913; https://doi.org/10.3390/ma11060913
Received: 7 May 2018 / Revised: 23 May 2018 / Accepted: 28 May 2018 / Published: 29 May 2018
(This article belongs to the Special Issue Environment-Friendly Construction Materials)
This paper investigates the heating characteristics and induced healing efficiencies of asphalt mixture containing steel fiber under induction heating and microwave heating. The heating characteristics of an asphalt mixture with different heating methods were studied with an infrared camera. The healing performance of the asphalt mixture specimens in different healing conditions were investigated by observing the crack closure and testing the fracture resistance recovery after healing. The results showed that the heating speed at the surface of asphalt mixture with induction heating was much higher than that with microwave machine heating, under a similar output power and the same method of radiation. While the temperature distribution within the asphalt mixture under induction heating was quite uneven, microwave heating resulted in a more uniform temperature distribution. The effective heating depth of microwave heating is much higher than that of induction heating. Gradient healing occurred within the sample heated with induction healing, while a uniform healing effect can be achieved with microwave heating. View Full-Text
Keywords: asphalt mixture; microwave heating; induction heating; effective heating depth; induced healing asphalt mixture; microwave heating; induction heating; effective heating depth; induced healing
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MDPI and ACS Style

Liu, Q.; Chen, C.; Li, B.; Sun, Y.; Li, H. Heating Characteristics and Induced Healing Efficiencies of Asphalt Mixture via Induction and Microwave Heating. Materials 2018, 11, 913.

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