Impact of Pavement Thermophysical Properties on Surface Temperatures
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 8
Abstract
A one-dimensional mathematical model was developed, based on the fundamental energy balance, to calculate the pavement near-surface temperatures using hourly measured solar radiation, air temperature, dew-point temperature, and wind velocity data. An analysis was conducted to predict the diurnal temperature effects of pavement thermophysical properties with the aim of seeking an optimum composition of paving materials for future infrastructure projects. Appropriate paving materials not only ensure stability and safety for road users, but also the ability to mitigate heat absorption and high surface temperatures contributing to the Urban Heat Island Effect and human comfort. This paper evaluated the effects and sensitivities of the thermophysical properties on the pavement surface temperatures. The results indicated that both albedo and emissivity have the highest positive effects on pavement maximum and minimum temperatures, respectively, while increasing the thermal conductivity, diffusivity, and volumetric heat capacity help in mitigating the maximum but not the minimum pavement near-surface temperature.
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Acknowledgments
The writers wish to thank the American Concrete Pavement Association, CEMEX S.A.B. de C.V. and CEMEX USA, the National Asphalt Paving Association, the Arizona Cement Association, the Arizona Department of Transportation, the City of Phoenix, Arizona, and the National Center of Excellence on SMART Innovations on Urban Climate and Energy at Arizona State University—a sponsored partnership with the U.S. Environmental Protection Agency. This material was based in part on work supported by the National Science Foundation, while one of the writers (P. E. P.) was working at the Foundation. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect the views of the National Science Foundation.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 8 • August 2007
Pages: 683 - 690
Copyright
© 2007 ASCE.
History
Received: Dec 7, 2005
Accepted: Apr 18, 2006
Published online: Aug 1, 2007
Published in print: Aug 2007
Notes
Note. Associate Editor: John S. Popovics
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