The Impact of Reactive Oxygen Species Coupled with Moisture on Long-Term Aging: Fourier-Transform Infrared Spectroscopy Approach

Bitumen, a crucial constituent in the composition of asphalt pavements, plays a vital role in determining the overall performance and durability of pavements throughout their lifespan. As an organic material derived from crude oil refineries, bitumen undergoes substantial aging over time because of complex interactions between its chemical components and various environmental factors. In this present investigation, the study focuses on examining the aging process of bitumen under the combined influence of moisture and reactive oxygen species (ROS). The findings highlight the importance of considering ROS and moisture as critical factors contributing to accelerated aging. The findings obtained from Fourier-transform infrared (FTIR) spectroscopy indicate that the concurrent influence of these two factors induces significant aging in bitumen, with the extent of this impact being modulated by the bitumen’s inherent aging susceptibility. The insights obtained from this study can contribute to the advancement of enhanced approaches for justifying the destructive impacts of aging on asphalt pavements, thereby prolonging their operational lifespan.