Porous asphalt pavement temperature effects for urban heat Island analysis

Jeffrey Stempihar, Tina Pourshams-Manzouri, Kamil Kaloush, Maria Rodezno

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Increased nighttime temperatures caused by retained heat in urban areas is a phenomenon known as the urban heat island (UHI) effect. Urbanization requires an increase in pavement surface area, which contributes to UHI as a result of unfavorable heat retention properties. In recent years, alternative pavement designs have become more common in an attempt to mitigate the environmental impacts of urbanization. Specifically, porous pavements are gaining popularity in the paving industry because of their attractive storm water mitigation and friction properties. However, little information regarding the thermal behavior of these materials is available. This paper explores the extent to which porous asphalt pavement influences pavement temperatures and investigates the impact on UHI by considering the diurnal temperature cycle. A one-dimensional pavement temperature model developed at Arizona State University was used to model surface temperatures of porous asphalt, traditional dense-graded asphalt, and portland cement concrete pavements. Scenarios included variations in pavement thickness, structure, and albedo. Thermal conductivity testing was performed on porous asphalt mixtures to obtain values for current and future analysis. In general, porous asphalt exhibited higher daytime surface temperatures than the other pavements because of the reduced thermal energy transfer from the surface to subsurface layers. However, porous asphalt showed the lowest nighttime temperatures compared with other materials with a similar or higher albedo. This trend can be attributed to the unique insulating properties of this material, which result from a high air void content. As anticipated, the outcome of this study indicated that pavement impact on UHI is a complex problem and that important interactions between influencing factors such as pavement thickness, structure, material type, and albedo must be considered.

Original languageEnglish (US)
Pages (from-to)123-130
Number of pages8
JournalTransportation Research Record
Issue number2293
DOIs
StatePublished - 2012

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Asphalt pavements
Pavements
Thermal effects
Asphalt
Temperature
Hot Temperature
Asphalt mixtures
Concrete pavements
Portland cement
Thermal energy
Energy transfer
Environmental impact
Thermal conductivity
Friction
Testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

Porous asphalt pavement temperature effects for urban heat Island analysis. / Stempihar, Jeffrey; Pourshams-Manzouri, Tina; Kaloush, Kamil; Rodezno, Maria.

In: Transportation Research Record, No. 2293, 2012, p. 123-130.

Research output: Contribution to journalArticle

Stempihar, Jeffrey ; Pourshams-Manzouri, Tina ; Kaloush, Kamil ; Rodezno, Maria. / Porous asphalt pavement temperature effects for urban heat Island analysis. In: Transportation Research Record. 2012 ; No. 2293. pp. 123-130.
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