Study On Rutting Resistance Of Hot Mixed Asphalt

Under the influence of severe climatic conditions and repeated traffic loading, the excessive permanent deformation caused or rutting is one of the typical symptoms of asphalt pavement damage.Based on the analysis of several graving curves used presently, the paper selects five typical trends of grading curve. Through systematic tests, five corresponding sequences of high-temperature stability are presented. The influences of content of flat, long and thin particles on rutting resistance of hot mixed asphalt composed of different type gradation are studied, and their limit values are given elementarily. By studying the moving orbits of the coarse aggregates in the asphalt concrete on loading courses, this paper describes the cause of rutting formation and development, and offers the idea for the further quantificational study. Through rutting tests and immerse rutting tests at different temperatures and loads, the paper analyzes the influences of severe climatic conditions and traffic conditions on permanent deformation of hot mixed asphalt. At the same time, the Coupling effects of high-temperature and water on permanent deformation of asphalt mixes are studied. Through immerse rutting tests on different pavement structure and material, the paper also contrasts and discusses its rutting formation and development.