沥青路面水性丙烯酸热反射涂层优化设计与路用性能

为降低沥青路面温度,缓解城市热岛效应,选用水性丙烯酸乳液作为基料,通过正交试验确定涂料最佳质量配合比,制备一种新型环保水性丙烯酸热反射涂层。利用室内降温装置测试涂刷量和温度对降温效果的影响,分析降温效果的相关性,并评价涂层的抗滑性能与粘附性能。结果表明,涂料最佳质量配合比为:水性丙烯酸乳液固含量为47%,金红石型钛白粉掺量为14%,石英粉掺量为7%,空心玻璃微珠掺量为3%(以上均为质量分数)。降温效果在一定范围随涂刷量的增大而增大,但到达一定程度后降温效果趋于平稳,推荐涂料最佳用量为1.0 kg/m²。涂层降温效果随温度的升高而增大,室内外降温效果的相关性极强。随着涂刷量的增大,抗滑性能不断降低,添加防滑颗粒能有效提高抗滑性能,且对降温效果几乎没有影响。粘附性能随涂刷量的增大而增大,试件打磨后粘附性能更强。

Optimal Design and Road Performance of Waterborne Acrylic Heat Reflective Coating on Asphalt Pavement

In order to reduce the temperature of asphalt pavement and alleviate the urban heat island effect, a new type of environmentally friendly waterborne acrylic heat reflective coating was prepared by selecting waterborne acrylic emulsion as the base material. The best quality mixing ratio of the paint was determined through orthogonal experiments. The indoor cooling device was used to test the influence of the amount of paint and temperature on the cooling effect. The correlation of the cooling effect was analyzed, and the anti-skid performance and adhesion performance of the coating were evaluated. The results show that the best quality mixing ratio of the paint is: the solid content of waterborne acrylic emulsion is 47%, the content of rutile titanium dioxide is 14%, the content of quartz powder is 7%, and the content of hollow glass beads is 3% (all above is mass fraction). The cooling effect increases with the increase of the amount of brushing, but after reaching a certain level, the cooling effect tends to be stable. The recommended best dosage is 1.0 kg/m². The cooling effect of the coating increases with the increase of temperature, and the correlation between indoor and outdoor cooling effects is extremely strong. With the increase of the amount of brushing, the anti-slip performance continues to decrease. The addition of anti-slip particles can effectively improve the anti-skid performance, and has almost no effect on the cooling effect. The adhesion performance increases with the increase of the amount of brushing, and the adhesion performance of the specimen is stronger after polishing.