Influence mechanism of crumb rubber pretreatment and antioxidants on aging and cracking behavior of rubberized asphalt
Year: 2026
Type: article
Abstract: The use of rubberized asphalt technology is continuously increasing because of its sustainability benefits. Incorporating crumb rubber (CR) into asphalt binders enhances their overall performance. However, segregation of CR from asphalt in storage tanks remains a significant challenge. In this study, the solution soaking pretreatment employed potassium permanganate (KMnO₄) and hydrogen peroxide (H₂O₂) solutions. Two antioxidants, lignin and butylated hydroxytoluene (BHT), were incorporated. Three aging methods were applied: pressure aging vessel (PAV) thermal-oxidative aging, ultraviolet (UV) aging, and roof aging for one year. Fourier-transform infrared spectroscopy (FTIR) and thin-layer chromatography with flame ionization detection (TLC-FID) were used to characterize chemical changes. The fatigue performance and stiffness properties of the rubberized asphalt were evaluated using linear amplitude sweep (LAS) and bending beam rheometer (BBR) tests, respectively. Pretreatment with KMnO₄ and H₂O₂ increased the susceptibility of rubberized asphalt to oxidation, altering its chemical composition and aging behavior. Incorporating antioxidants, especially BHT, significantly enhanced the fatigue life, flexibility, and relaxation properties of rubberized asphalt.
Authors: Abdulrahman Badughaish, Ahmed S. Mohamed, Mohsen Alae, Serji Amirkhanian, Feipeng Xiao
Institutions: Tongji University, Sohag University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,540
OpenAlex ID: W7128922190