热反射技术及其在多年冻土区道路热保护中的应用

热反射技术是一项被广泛应用于建筑物及道路表面降温的主动冷却技术， 国内外很少对此技术在多年冻土区道路热保护方面进行研究。针对多年冻土区气候及工程环境特点， 综述了热反射技术在冻土区道路中的应用现状和研究成果， 阐述了热反射涂层的基本成分、 反射机理和测试方法， 分析了路用热反射涂层的材料性能、 反射效果和路用性能， 简要介绍了热反射涂层在路基边坡应用方面的研究进展。指出在当前条件下利用热反射涂层保护多年冻土区道路所遇到的问题及可行的解决方案， 并在此基础上提出了今后研究的重点： 从材料选择、 理论分析和试验方法入手， 对路用热反射涂层的颜色、 反射性能、 路用性能和区域适用性进行改进和研究， 加强多年冻土区道路热反射涂层的野外试验和分析， 深入研究复杂气候和工程环境下的热反射涂层性能。

Heat-reflective technology and its application in the thermal protection of roads in permafrost regions

Heat-reflective technology is widely used for effectively cooling buildings and road surfaces. Few studies have been conducted on the thermal protection of roads in permafrost regions. Based on the characteristics of climate and engineering environment in permafrost regions， this paper reviews the application and research progress of heat-reflective technology in permafrost roads. The basic compositions， heat-reflective mechanisms and testing methods of heat-reflective coatings are introduced. Meanwhile， the material property， heat-reflective performance and pavement performance of the pavement coatings are emphatically analyzed. The applications of heat-reflective coatings on embankment slopes are briefly discussed. Finally， it is pointed out that the problems encountered in the use of heat-reflective coatings to protect roads in permafrost regions under current conditions. On this basis， the focus of future research is put forward： started with material selection， theoretical analysis and test methods， improve the color， cooling performance， pavement performance and regional applicability of heat-reflective coatings， enhance the field tests of heat-reflective coatings in permafrost regions， study the coating performance under complex climate and real engineering environments.