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-  2018 

基于多孔属性的环保型路用涂层性能
Performance of environment-friendly road coating based on porous properties

Keywords: 道路工程,涂层,多孔属性,降温,净化空气,路用性能
road engineering
,coating,porous property,cooling,air purification,road performance

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Abstract:

为降低路面温度、缓解沥青路面车辙病害的同时兼具净化汽车尾气功效以改善道路使用环境,优选多孔属性材料为功能材料,制备了具有降温和净化空气功效的WEPC(环保型多孔涂层)路用涂层,分析功能材料掺量对涂层基本性能的影响规律,借助室内外测温试验全面评价了不同涂刷量下WEPC涂层的降温效果。借助空气净化性能试验箱对WEPC路用涂层试件在升降温过程中的汽车尾气成分及含量进行了测试,全面评价不同温度下WEPC涂层的净化空气效果。通过表面构造深度和抗滑摆值试验、磨耗试验、车辙试验及耐久性试验等确定了WEPC涂层的路用性能,采用扫描电镜和红外光谱分析手段研究多孔属性的环保型路用涂层材料的微观结构。结果表明:功能材料掺量(质量分数,下同)为20%时WEPC涂层具有良好的基本性能;WEPC涂层具有良好的降低路面温度功效,涂刷量越大降温效果越显著,降温幅度最高可达10 ℃,综合WEPC涂层基本性能和降温效果,推荐最佳涂刷量为0.8 kg/m2;WEPC涂层在不同温度下均具有一定的净化空气功效,升温区间下的净化效果较好,其对PM2.5和PM10的净化率可达40%以上,COx、NOx及SO2的净化率在25%左右;WEPC涂层的抗滑、耐磨耗、高温稳定及耐久性等各项路用性能良好,且均满足相关规范要求;功能型材料能够稳定均匀地分散于涂层材料中,并使涂层材料中出现了一些新的官能团。
In order to reduce pavement temperature, alleviate rutting disease of asphalt pavement and purify the vehicle exhaust to improve the environment of road, road coating with cooling and purification effects, named environment-friendly porous coating (WEPC), was prepared with porous materials as the functional materials. The effects of the functional materials’ dosage on basic performances of WEPC were analyzed. The cooling effect of WEPC road coating under different brushing amount was comprehensively evaluated by indoor and outdoor temperature measuring tests. The contents of various components of vehicle exhaust of WEPC road coating specimen at different intervals were tested by air purification performance box test, and then air purification effects of WEPC coating at different temperatures were comprehensively evaluated. Meanwhile, the pavement performances of WEPC coating were confirmed by surface tectonic depth and pendulum test, abrasion test, rutting test and durability test. And micro-structures of environment-friendly road coating materials with porous properties were analyzed by using the scanning electronic microscopy and infrared spectrum. The results show that WEPC coating has good basic performance when the dosage (mass fraction) of functional material is 20%. WEPC has a good cooling effect, the cooling effect is more significant under a greater amount of brushing, and the highest cooling effect can reach up to 10 ℃. Combined with basic properties of WEPC coating and cooling effect, the optimum brushing amount is recommended to be 0.8 kg/m2. WEPC coating has a certain effect on air purification at different temperatures and the purification effect is better under the heating interval. The purification rates of particulate matters with particle size below 2.5 (PM2.5) and below 10 microns (PM10) can reach up to more than 40%. In addition, the purification rates of carbon oxides, nitrogen oxides, and sulfur dioxides are about 25%. WEPC coating has good road

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