胶粉负载型路面尾气降解复合材料的路用性能

针对TiO2光催化降解尾气技术难应用于沥青路面的弊端,试验研究了可用于各类路面的尾气降解材料的路用性能和尾气降解效果.结果表明:胶粉负载光催化剂型路面尾气降解复合材料的力学性能和耐久性均满足相关标准要求,用沥青黏结层者抗冲击性、拉伸黏结强度和低温抗裂性较好,用环氧树脂黏结层者高温稳定性和水稳定性较好;该降解复合材料会降低路表宏观构造深度,但胶粉摩阻作用能提高路面综合抗滑性,对水泥混凝土路面板抗滑性的改善效果优于沥青路面板,可使前者摩擦摆值提高11.5％;该降解复合材料1h可降解95％(质量分数)初始质量浓度0.002％的NO2气体,且水稳定性较好,浸水7d仍具有1h降解35 ％NO2气体的降解效果.

Pavement Performances of Composite Material with Rubber Powder Loading Photocatalyst for Pavement Automobile Exhaust Degradation

In order to overcome the limitation that TiO2 photocatalytic technology is difficult to be applied in asphalt pavement, the pavement performance and degradation effect of a new material for automobile exhaust degradation on all kinds of pavements were studied by experiments. Results show that mechanical properties and durabilities of the researched material can satisfy code requirements; use of asphalt binder layer can achieve better impact resistance, tensile bond strength and low temperature crack resistance, while use of epoxy resin binder layer can achieve better high temperature stability and water stability; by coating the prepared material, macro texture depth of pavement surface may decrease, but comprehensive anti skid performance can be improved due to the friction of rubber powder, and the British pendulum number of concrete pavement slab can be increased by 11.5%, whose anti skid performance improvement is better than that of asphalt pavement slab; in 1h, the material can degrade 95%(by mass) NO2 whose initial gas concentration is 0.002%(by mass), and with a good water stability, it can still degrade 35% NO2 even after soaking for 7d.