Study on Aging Kinetic Performance of SBR Modified Asphalt

By analyzing the aging properties of SBR modified asphalt and the cohesive properties between mineral particles and bituminous materials on the influence of dynamic factors,the rolling thin film oven test was preformed and the changes of softening point along with the aging temperature and aging time were compared between base asphalt and SBR modified asphalt.Based on parameter of softening point,aging kinetic model was established to research the aging kinetics performance of SBR modified asphalt.The reaction rate constant of SBR modified asphalt was decreased than that of matrix asphalt;The reaction activation energy of SBR modified asphalt reached to 48.863 kJ·mol-1,which had increased 13.1% than that of matrix asphalt.The study indicates that the aging kinetic model based on parameter of softening point can express the aging process of asphalt and the anti-aging performance of SBR modified asphalt is better than that of matrix asphalt.