Automobile Exhaust Degradable Asphalt Mixture Development and Engineering Application

Abstract

Abstract: A new type of nano-TiO₂-based photocatalytic degradation material (WLSF-TiO₂) was developed to degrade automobile exhaust in urban areas. The thin-layer overlay asphalt mixture was prepared by the addition of WLSF-TiO₂ and applied in the pavement preventive maintenance project of Beijing Jingshan Qian Avenue. The indoor evaluation indicated that, with the addition of WLSF-TiO₂, the road performance of asphalt mixture still meets the Chinese specification of asphalt mixture, while the effect of automobile exhaust (NO_x, HC, CO) degradation is increased by more than 30% contrast to asphalt mixture with traditional TiO₂ additive. The outdoor measurements in pavement site show that the automobile exhaust degradation effect of WLSF-TiO₂ reaches about 10%.

Key words: automobile exhaust, degradation, asphalt mixture, TiO₂-based photocatalytic degradation material, performance evaluation, engineering application

CLC Number:

U416.217

LI Weirui, PENG Geng, WU Yanhua, DONG Xueqian, XU Shifa. Automobile Exhaust Degradable Asphalt Mixture Development and Engineering Application[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1405-1412.

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