1. Effect of Photocatalyst on Rheological Behavior and NO Degradation Capacity of Asphalt Binder.
- Author
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Wang, Yan, Wang, Xinyu, Niu, Dongyu, Niu, Yanhui, Xia, Huiyun, and Wang, Yue
- Subjects
FATIGUE limit ,ASPHALT ,FATIGUE life ,NITRIDES ,WASTE gases ,VISIBLE spectra ,TITANIUM dioxide - Abstract
To reduce vehicle exhaust gas pollution in transport-intensive roadways and tunnels, six types of photocatalytic asphalt binders were designed using graphite-phase carbon nitride (g-C
3 N4 ) and nanoscale titanium dioxide (nano-TiO2 ) particles. In this paper, the rheological behaviors and fatigue life of the nano-TiO2 -modified asphalt binder (TiO2 -MA) and g-C3 N4 -modified asphalt binder (C3 N4 -MA) were investigated. NO degradation capacity of six types of photocatalytic asphalt binders was characterized under visible light conditions. The results showed that TiO2 -MA had more excellent rheological behaviors and rutting resistance than C3 N4 -MA. In addition, 4 wt% nano-TiO2 markedly improved the rheological behaviors and rutting resistance of MA compared to other dosages. TiO2 -MA exhibited higher fatigue resistance. The fatigue life of TiO2 -MA with 4 wt% nano-TiO2 was increased to 234.1% at 2.5% strain and 242.5% at 5% strain, respectively, compared to base asphalt binder (BA). C3 N4 -MA had better NO degradation capacity than TiO2 -MA. Meanwhile, the NO degradation efficiency of C3 N4 -MA reached 17.8% with 5 wt% g-C3 N4 . [ABSTRACT FROM AUTHOR]- Published
- 2023
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