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Effect of Material Composition and Environmental Condition on Thermal Characteristics of Conductive Asphalt Concrete

by Pan Pan 1,2, Shaopeng Wu 2, Xiaodi Hu 1,*, Gang Liu 2 and Bo Li 2,3
1
School of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, China
2
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
3
College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Materials 2017, 10(3), 218; https://doi.org/10.3390/ma10030218
Received: 3 January 2017 / Revised: 18 February 2017 / Accepted: 20 February 2017 / Published: 23 February 2017
Conductive asphalt concrete with high thermal conductivity has been proposed to improve the solar energy collection and snow melting efficiencies of asphalt solar collector (ASC). This paper aims to provide some insight into choosing the basic materials for preparation of conductive asphalt concrete, as well as determining the evolution of thermal characteristics affected by environmental factors. The thermal properties of conductive asphalt concrete were studied by the Thermal Constants Analyzer. Experimental results showed that aggregate and conductive filler have a significant effect on the thermal properties of asphalt concrete, while the effect of asphalt binder was not evident due to its low proportion. Utilization of mineral aggregate and conductive filler with higher thermal conductivity is an efficient method to prepare conductive asphalt concrete. Moreover, change in thermal properties of asphalt concrete under different temperature and moisture conditions should be taken into account to determine the actual thermal properties of asphalt concrete. There was no noticeable difference in thermal properties of asphalt concrete before and after aging. Furthermore, freezing–thawing cycles strongly affect the thermal properties of conductive asphalt concrete, due to volume expansion and bonding degradation. View Full-Text
Keywords: conductive asphalt concrete; thermal characteristic; material composition; environmental condition; thermal constants analyzer conductive asphalt concrete; thermal characteristic; material composition; environmental condition; thermal constants analyzer
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MDPI and ACS Style

Pan, P.; Wu, S.; Hu, X.; Liu, G.; Li, B. Effect of Material Composition and Environmental Condition on Thermal Characteristics of Conductive Asphalt Concrete. Materials 2017, 10, 218.

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