Long-lasting emission reduction modified asphalt: preparation, pavement performances and emission reduction efficacy

To reduce the emission of asphalt fumes from asphalt pavements, an asphalt emission reduction modifier (TAP) and its modified asphalt were prepared. Its high and low-temperature rheological properties and medium-temperature fatigue resistance were analyzed and evaluated. The influence of different TAP dosages on the emission reduction efficacy of asphalt pollutants was explored. The long-term emission reduction efficacy of long-lasting emission reduction modified asphalt was verified. The emission reduction efficacy of TAP on asphalt VOCs was verified by HS-GC–MS test. This lays a solid foundation for further popularizing low-carbon asphalt in the transportation infrastructure field. The results show that TAP can effectively improve the high-temperature deformation resistance, low-temperature crack resistance, and fatigue resistance of asphalt. Long-lasting emission reduction modified asphalt with different TAP dosages all show significant emission reduction efficacy. Among them, when the TAP content is 20%, the emission reduction rates of gaseous and solid pollutants during the construction period both exceed 55%, and those during the operation period both exceed 45%. The long-term emission reduction efficacy of long-lasting emission reduction modified asphalt is remarkable. The coefficients of variation of the emission reduction rates of gaseous and solid pollutants in asphalt fume before and after long-term aging are both less than 4%.