A study on kinetics of aging of paving asphalt

In this paper the aging processes of two penetration-grade paving asphalt w hich conform to the standard of Esson Company have been studied by rotation thin film oven (RTFO). The first order aging kinetic model has been establ ished and some kinetics parameters were calculated. The relationship betwee n pavement properties of asphalt and aging course was revealed. The interve ntion of oxygen in high temperature caused oxidation reactions, which chang ed the composition and structure of asphalt, the aging resistant performanc e of asphalt was weak, and the service performance went to bad.