彩色反射式沥青路面涂层的路用性能

Road performance of color reflective asphalt pavement coating

为提高沥青路面的高温稳定性,缓解城市热岛效应,研发了一种彩色反射式沥青路面涂层.首先确定了涂层各原材料用量及制备工艺,然后试验分析了不同颜色涂层的降温效果,最后测试了涂层对路面表面功能的影响,并提出改善措施.结果表明:当反射填料TiO_2与成膜基料的体积比为2.8%时,降温效果最优;从经济和降温效果的角度考虑,推荐红色、绿色以及黄色的填料与成膜基料的体积比分别为2.7%,2.6%和3.2%;为改善涂层的抗滑和耐磨耗性能,可在涂层中部铺撒撒布量为0.48~0.50 kg·m^(-2)的机制砂,并在涂料中加入其质量30%的轻质碳酸钙.

To improve the high temperature stability of asphalt pavement and alleviate the urban heat island effect,a color reflective asphalt pavement coating was developed.The amount of raw materials and the preparation process of coating were determined,and the cooling effects of color coating were tested and analyzed.The effect of coating on the surface function of pavement was tested,and the improvement measures were put forward.The results show that the cooling effect is the best when the volume ratio of TiO 2 to film forming base is 2.8%.The cooling effect of the coating is improved with the increasing of color filler,while the cooling effect tends to be unchanged when the color filler is larger than a certain threshold.The volume ratios of color filler to film forming base are recommended from the economic and cooling effect with red of 2.7%,green of 2.6%and yellow of 3.2%.In order to improve the anti-slide performance and abrasion resistance of the coating,0.48~0.50 kg·m-2 mechanical sand should be sprayed in the middle part of coating,and the light calcium carbonate with 30%coating quality should be added.