Abstract:In order to explore the optimized performance of modified asphaltꎬ improve the extensive application of asphalt materials in high-grade highway pavementꎬ and reduce the construction cost of asphalt concrete pavementꎬ rosin resin is used as a modifier in this experiment with the proportion of rosin resin of 5%ꎬ 8%ꎬ 10%ꎬ 12% and 15% respectively. The basic index testꎬ standard viscosity testꎬ dynamic shear rheological test (DSR) and bending beam rheological test (BBR) are carried out for the modified asphalt mortar. The test results show that the shear strengthꎬ high temperature resistance and rutting resistance of asphalt mortar materials are greatly improved when the proportion of rosin resin is 10% ~ 12%ꎬ which provides a basis for the feasibility of rosin resin modified asphalt in the concrete pavement