TPS高粘沥青抗紫外线老化复配剂研究

Study on the Compound Anti UV Aging Agent of TPS High Viscosity Asphalt

基于提高TPS高粘沥青的抗紫外线老化性能的目的,本文选择了抗氧化剂565和TiO2作为试验材料,对不同原材料掺量下的TPS髙粘沥青进行紫外线加速老化试验,根据试验结果建立TPS高粘沥青紫外线老化方程及紫外线老化速率方程,分析抗氧化剂565和TiO2组合模式的效果。研究结果表明:抗氧化剂565的掺入对TPS高粘沥青的各项技术性能无明显影响,TiO2的掺入使5℃延度略有减小;抗氧化剂565在抑制TPS高粘沥青135℃粘度上升方面优于TiO2,在减小针入度的紫外线老化损失方面弱于TiO2,在减小低温延度紫外老化损失上TiO2作用更佳明显;借助紫外线老化方程及紫外线老化速率方程认为0.1%抗氧化剂565+0.3%TiO2的组合能够有效的降低紫外线对TPS高粘沥青的5℃延度、针入度、135℃布氏粘度的老化速率及最终老化程度。

In order to improve the UV aging performance of TPS high viscosity asphalt, antioxidant 565 and TiO2 were used as raw material, accelerated UV aging test of TPS high viscosity asphalt with different antioxidant 565 and TiO2 content were done, and UV aging equation and UV aging rate equation were also established to find the best antioxidant 565 and TiO2 content. The results show that,there is no obvious change of TPS high viscosity asphalt performance after antioxidant 565’s incorporation, the same result to the TiO2’s incorporation except ductility at 5 ℃ reduce slightly. Antioxidant 565 is more beneficial to control the Viscosity rising of TPS high viscosity asphalt than TiO2, but TiO2 is more beneficial to control the penetration and ductility reduce, although it damages the ductility in the beginning of UV aging. By the help of UV aging equation and UV aging rate equation, 0.1% antioxidant 565 +0.3% TiO2 is the best combination point at the anti UV aging ofTPS high viscosity asphalt.