热反射涂层开发及路用性能观测研究

Development of Heat Reflection Coating and Observation of Its Road Performance

通过分析沥青路面的光热环境,建立了沥青路面的热平衡方程。提高路面的反射率可以降低沥青路面的平衡温度,有利于减少车辙病害和缓解城市热岛效应。使用热反射涂层可以有效地提高沥青路面的反射率。开发了3种不同配方的路用热反射涂层材料,于室内测试了各配方及国外某产品的降温效果,最后通过修筑热反射涂层试验路观测其抗滑性能和眩光情况,并进行经济性分析。结果表明,所开发的热反射涂层材料降温效果较好,最大可以降低表面温度11.4℃。应用热反射涂层后路面的抗滑性能略有降低,但仍满足路用要求。新铺筑的热反射涂层的眩光性能介于普通路面和交通标线之间,在使用过程中逐渐降低。所开发的路用热反射涂层材料的造价较低,可以作为一种预防性养护措施。

The heat balance equation of asphalt pavement was built based on analysis of the working environment.The balance temperature of asphalt pavement can be effectively reduced by increasing the albedo of pavement surface which is propitious to reduce rutting and urban heat island effect,and using heat reflection coating can increase the albedo effectively.Three new heat reflection coatings for road were designed.The lowering temperature effect of new designed coatings and an aboard one were tested in lab.At last,the performance of anti-skid and glare of the coatings were observed on the test road,and the economy of the coatings was also analysed.The results show that（1） the designed heat reflection coatings can decrease surface temperature about 11.4℃ farthest;（2） the anti-skid performance of the pavement which using the coatings decreases slightly but still satisfy requirement;（3） glare performance of new heat reflection coatings is between that of common pavement and traffic line,and reduces with service.The cost of the designed coating materials is cheap and be used as a preventive maintenance method.