Porous Asphalt Pavement Temperature Effects for Urban Heat Island Analysis
Porous Asphalt Pavement Temperature Effects for Urban Heat Island Analysis
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DOI：
10.3141/2293-15
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发表时间：
2012-01-01
影响因子：
1.7
通讯作者：
Rodezno, Maria Carolina
中科院分区：
文献类型：
--
作者：
Stempihar, Jeffrey J.;Pourshams-Manzouri, Tina;Rodezno, Maria Carolina
城市地区的余热导致夜间温度升高，这是一种被称为城市热岛效应的现象。城市化需要增加路面表面积，由于不利的保温性能，这有助于城市热岛。近年来，为了减轻城市化对环境的影响，替代路面设计变得越来越普遍。具体来说，多孔路面在铺装行业越来越受欢迎，因为它们有吸引力的雨水缓解和摩擦性能。然而，关于这些材料的热行为的信息很少。本文探讨了多孔沥青路面对路面温度的影响程度，并考虑了日温度循环对热岛热岛的影响。亚利桑那州立大学开发的一维路面温度模型用于模拟多孔沥青、传统密级配沥青和波特兰水泥混凝土路面的表面温度。场景包括路面厚度、结构和反照率的变化。对多孔沥青混合物进行导热测试，以获得当前和未来分析的值。总的来说，多孔沥青比其他路面表现出更高的白天表面温度，因为从表面到次表层的热能传递减少了。然而，与反照率相似或更高的其他材料相比，多孔沥青的夜间温度最低。这种趋势可以归因于这种材料独特的绝缘性能，这是由高空气空隙含量造成的。正如预期的那样，本研究的结果表明，路面对城市热岛的影响是一个复杂的问题，必须考虑路面厚度、结构、材料类型和反照率等影响因素之间的重要相互作用。
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.