Application performance evaluation on material of automobile exhaust degradation in asphalt pavement

作者：Tan Yi Qiu^*; Li Luo Ke; Wei Peng; Sun Zheng

来源：China Journal of Highway and Transport, 2010, 23(6): 21-27.

• Automobile exhaust degradation
• Environmental-friendly
• Evaluation index
• Experimental research
• Photocatalyzer
• Road engineering

Photocatalysed material TiO2 was applied to the asphalt pavement by means of overlaying and adding, so that environmental friendly asphalt pavement which can degradate the automobile exhaust formed. A series of corresponding test methods and evaluation indexes were formulated. The factors which affect the performance of automobile exhaust degradation were tested by using self-designed equipment. Furthermore, the performance of additive mixture and durability of overlay coating with different additive modes were analyzed by considering the characteristics of road engineering. Results show that the ultraviolet is essential reactive condition of making full use of photocatalyzer capacity on degradating harmful gas. When the overlaying mode is adopted, it is the most economic and reasonable that the dosage percentage of overlaying photocatalyzer is 8% to 10% of carrier binder, and the recommendatory upper limit dosage value of photocatalysed coating is 500 g&middotm-2, and the lower limit value is 350 g&middotm-2. Gradation variety hasn';t dramatic influence on the degradation performance of the photocatalysed coating. When the adding mode is adopt, it is more advisable that the dosage percentage of adding photocatalyzer is 50% to 60% of mineral powder. The addition of photocatalyzer has little influence on the performance of asphalt mixture.

• 出版日期2010