ABSTRACT

A new asphalt pavement heat reflective coating was prepared with epoxy resin emulsion as the coating subs-trate, titanium dioxide, silicon dioxide, diatomite and hollow glass bead as the functional fillers, added fumed silica and other materials as the additives after surface modification. The color and optimum brushing quan-tity of the coating was determined by comparative experiments, and the actual cooling effect and road perf-ormance of the coating were analyzed systematically. The result shows that the surface modification of func-tional fillers can inhibit the agglomeration between particles effectively, and the recommended dosage is 30%. The light grey coating, made of 2% iron oxide black as the pigment, can best balance the cooling ability and visual comfort. The laboratory cooling test showed that the optimal brushing quantity of coating is 0.8kg /m2, when the surface temperature of the uncoated part is 62.8°C, it can be decreased by approximately 10.4°C. According to the field cooling test, when the atmospheric temperature is 37°C and the asphalt pavement surface temperature is 51.2°C, the temperature of the coating is 46.0°C. The coatings pavement performance meets the requirements of the specification after adding anti-skid particles.

摘要

以环氧树脂乳液为涂料基材，以二氧化钛、二氧化硅、硅藻土和空心玻璃珠为功能填料，添加气相二氧化硅等助剂，经表面改性后制备了一种新型沥青路面热反射涂料。通过对比试验确定了涂层的颜色和最佳涂刷量，并对涂层的实际降温效果和路面性能进行了系统分析。结果表明，功能性填料的表面改性能有效抑制颗粒间的团聚，推荐用量为30%。以2%氧化铁黑为颜料制成的浅灰色涂层，能最好地平衡散热能力和视觉舒适度。实验室降温试验表明，最佳涂刷量为0.8kg/m2，当未涂装部位表面温度为62.8℃时，可降低约10.4℃。根据现场降温试验，当大气温度为37℃，沥青路面表面温度为51.2℃时，涂层温度为46.0℃。添加防滑颗粒后涂料路面性能满足规范要求。