Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture
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Section of Pavement Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands
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Institute of Highway Engineering, RWTH Aachen University, Mies-van-der-Rohe-Street 1, 52074 Aachen, Germany
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School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China
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Department of Civil Engineering, University of Bristol, BS8 1TR Bristol, UK
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School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang 441053, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(1), 146; https://doi.org/10.3390/ma12010146
Received: 12 December 2018
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Revised: 25 December 2018
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Accepted: 28 December 2018
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Published: 4 January 2019
(This article belongs to the Special Issue Sustainable Designed Pavement Materials)
Microwave heating is an encouraging heating technology for the maintenance, recycling, and deicing of asphalt pavement. To investigate the microwave heating properties of asphalt mixture, laboratory tests and numerical simulations were done and compared. Two types of Stone Mastic Asphalt (SMA) mixture samples (with basalt aggregates and steel slag aggregates) were heated using a microwave oven for different times. Numerical simulation models of microwave heating of asphalt mixture were developed with finite element software COMSOL Multiphysics. The main thermal and electromagnetic properties of asphalt mixture, served as the model input parameters, were measured through a series of laboratory tests. Both laboratory-measured and numerical simulated surface temperatures were recorded and analyzed. Results show that the replacement of basalt aggregates with steel slag aggregates can significantly increase the microwave heating efficiency of asphalt mixture. Numerical simulation results have a good correlation with laboratory test results. It is feasible to use the developed model coupling electromagnetic waves with heat transfer to simulate the microwave heating process of asphalt mixture.
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Keywords:
asphalt mixture; microwave heating; steel slag; dielectric loss; electromagnetic; numerical simulation
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MDPI and ACS Style
Wang, H.; Zhang, Y.; Zhang, Y.; Feng, S.; Lu, G.; Cao, L. Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture. Materials 2019, 12, 146. https://doi.org/10.3390/ma12010146
AMA Style
Wang H, Zhang Y, Zhang Y, Feng S, Lu G, Cao L. Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture. Materials. 2019; 12(1):146. https://doi.org/10.3390/ma12010146
Chicago/Turabian StyleWang, Haopeng, Yue Zhang, Yi Zhang, Shuyin Feng, Guoyang Lu, and Lintao Cao. 2019. "Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture" Materials 12, no. 1: 146. https://doi.org/10.3390/ma12010146
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