Characteristics and assessment of volatile organic compounds from different asphalt binders in laboratory

The high construction temperature of asphalt pavement will cause the volatile organic compounds (VOCs) emission, which seriously affects the environment and the workers' health. However, current research on the characteristics of asphalt VOCs emission less involves quantitative analysis. In this study, gas chromatography-mass spectrometry (GC-MS) was used to analyze the emission characteristics of 8 different asphalt VOCs from the “materials-groups-components” multi-level. The assessment of negative impact includes environment, health risk and odor. The results show that the characteristic of asphalt VOCs emission are material-dependent, benzene series and aldehydes make the most contribution to ozone formation, only alkanes, benzene series and olefins make contribution to the secondary organic aerosol (SOA) formation. Besides, acetaldehyde makes the most contribution to carcinogenic risk, acetaldehyde and acrolein make the most contribution to non-carcinogenic risk. The aldehtdes makes the most contribution to the asphalt odor. This study provided theoretical support for the reduction measures of asphalt VOCs emission.