Thermal properties of asphalt pavements under dry and wet conditions
Thermal properties of asphalt pavements under dry and wet conditions
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DOI：
10.1016/j.matdes.2015.11.116
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发表时间：
2016-02-05
影响因子：
8.4
通讯作者：
Garcia, Alvaro
中科院分区：
文献类型：
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作者：
Hassn, Abdushaffi;Chiarelli, Andrea;Garcia, Alvaro
空气空洞在暴露于太阳辐射和环境中的沥青路面温度演变中起着重要作用，但其影响从未被精确量化。本文的目的是了解和量化空气空隙对沥青混合料在干湿条件下温度演变的影响。为了实现这一目标，研究人员将具有不同空隙率的干燥和饱和沥青板暴露在红外光下，并测量了表面和底部的温度演变、热通量和蒸发速率。研究发现，在干燥条件下，空气空隙仅影响沥青混合料的比热容和导热系数，而在潮湿条件下，水蒸发所消耗的能量大大降低了沥青混合料的温度。这对缓解城市热岛影响具有重要意义。(C) 2015 Elsevier Ltd.版权所有。
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. (C) 2015 Elsevier Ltd. All rights reserved.