Correlation between the Performance of Asphalt Fine Aggregate Matrix and the Performance of Hot-Asphalt Mix under Ultraviolet Aging

Abstract

The performance of hot-asphalt mix (HMA) is significantly impacted by ultraviolet (UV) aging. While asphalt fine aggregate matrix (FAM) is a crucial component of HMA, its impact on the material’s performance during UV aging has not been thoroughly investigated. This study employed UV lamps to simulate outdoor UV lighting conditions for conducting UV aging experiments on FAM and HMA. A dynamic shear rheometer (DSR) test was used to conduct a correlative analysis of the complex shear modulus, fatigue performance, and creep characteristics. The results indicate a significant correlation between FAM and HMA in terms of low-temperature crack resistance and high-temperature stability. This study elucidates the variations in performance between the two materials under UV aging conditions. The aging damage trends of HMA can be effectively predicted by using FAM; however, a thorough analysis must consider the impact of UV aging on the interface between the aggregates and the asphalt binder. The multiscale examination of HMA can benefit from this study.