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Thermal properties of asphalt pavements under dry and wet conditions

Hassn, Abdushaffi; Chiarelli, Andrea; Dawson, Andrew; Garcia, Alvaro

Authors

Abdushaffi Hassn

Andrea Chiarelli

Andrew Dawson



Abstract

Air voids play an important role in the temperature evolution of asphalt pavements exposed to the sun's radiation and the environment, but their effects have never been precisely quantified before. The objective of this article is to understand and quantify the effect of air voids on the temperature evolution of asphalt mixture under dry and wet conditions. To achieve this objective, dry and saturated asphalt slabs with different air voids contents have been exposed to infrared light and the surface and bottom temperature evolution, heat flux and evaporation rate have been measured. It was observed that under dry conditions air voids simply affect the specific heat capacity and thermal conductivity of asphalt mixture, while under wet conditions the energy used by water for evaporation reduces drastically the temperature of asphalt mixture. This has significance for Urban Heat Island mitigation amongst other implications.

Citation

Hassn, A., Chiarelli, A., Dawson, A., & Garcia, A. (2016). Thermal properties of asphalt pavements under dry and wet conditions. Materials and Design, 91, doi:10.1016/j.matdes.2015.11.116

Journal Article Type Article
Acceptance Date Nov 28, 2015
Online Publication Date Nov 30, 2015
Publication Date Feb 5, 2016
Deposit Date Aug 3, 2016
Journal Materials & Design
Print ISSN 0261-3069
Electronic ISSN 0264-1275
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 91
DOI https://doi.org/10.1016/j.matdes.2015.11.116
Public URL http://eprints.nottingham.ac.uk/id/eprint/35660
Publisher URL http://www.sciencedirect.com/science/article/pii/S0264127515308546
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf