Effect of Light-Dark Alternating UV Aging Condition on Asphalt Performance
WANG Jiani
JI Manman
XUE Zhongjun
LIU Hao
ZHANG Jiarong
Abstract：To investigate the effects of diurnal alternation in natural environments on asphalt aging,a light-dark alternating ultraviolet(UV)aging test was designed.The rheological properties of asphalt subjected to light-dark alternating UV aging were explored using dynamic shear rheometer,bending beam rheometer,and atomic force microscope.The results indicate that compared to continuous UV aging,the light-dark alternating UV aging has a more significant effect on the rheological properties of asphalt.After light-dark alternating UV aging,the base asphalt exhibits more severe deterioration in its rheological performance at both high and low temperatures,with poorer fluidity and lower temperature sensitivity at moderate temperatures.At the same depth,the number and total area of the honeycomb structures in the asphalt are decreased,indicating deeper diffusion of aged substances within the asphalt and a higher degree of aging.
Keywords：road engineeringasphaltlight-dark alternatingUV agingrheological propertydiffusion
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 385-392 )