Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement
Analysis on Environmental Thermal Effect of Functionally Graded Nanocomposite Heat Reflective Coatings for Asphalt Pavement
复制标题
DOI：
10.3390/coatings9030178
复制
发表时间：
2019-03-07
期刊：
影响因子：
3.4
通讯作者：
He, Litao
中科院分区：
文献类型：
--
作者：
Zheng, Mulian;Tian, Yanjuan;He, Litao
沥青路面热反射涂层是一种涂敷在路面表面的功能层，通过反射太阳光减少路面中的热量储存，从而抑制路面温度上升。分析了自行研制的沥青路面反射涂层--功能梯度纳米复合反射涂层的环境热效应。在现场试验的基础上，对热反射涂料的热效应进行了对比分析。建立了近路面大气层加热模型。分析了城市道路温度对人体热舒适性的影响。结果表明，与对照沥青路面相比，热反射涂层的辐射热降低了约2/3，对流热降低了近50%，路面本身温度和大气层温度均有所降低。此外，热反射涂层改善了人体的热舒适性。这表明热反射涂层降低了环境温度，缓解了城市热岛效应，改善了环境热效应。
The heat-reflective coating for asphalt pavement is a functional layer applied on pavement surfaces to reduce heat storage in the pavement via reflecting sunlight, thus inhibiting pavement temperature rise. The objective of this study was to analyze the environmental thermal effect of the self-developed reflective coating, namely, functionally graded nanocomposite reflective coatings, for asphalt pavement. The thermal effects of heat-reflective coatings were compared and analyzed based on field tests. A heating model of the atmosphere layer near the road surface was established. Moreover, the influence of urban road temperature on the thermal comfort of the human body was analyzed. Results showed that the radiation heat of all heat-reflective coatings decreased around two-thirds, and the convective heat decreased nearly 50% when compared with the control asphalt pavement, and the temperatures of the pavement itself and the atmosphere layer were lowered. Additionally, the heat-reflective coating improved the thermal comfort of the human body. This indicated that the heat-reflective coating reduced ambient temperate and relieved the urban heat island effect (UHI) as well as improved the environmental thermal effect.