Study on mechanical property of large particle size modified asphalt mixture with multipore

In this paper, mechanical properties of large size modified asphalt mixture AM-25 with multipore were investigated. Rutting test, split test and bending test of small beam were performed on asphalt mixture with different contents of rock asphalt, lake asphalt and rubber powder respectively. It was demonstrated that the dynamic stability, splitting tensile strength and bending tensile strength of the modified asphalt mixture AM-25 increase with the increasing content of the three modifiers. By comprehensive comparison, the rock asphalt modified mixture had the most excellent mechanical properties, followed by the lake asphalt modified mixture, while the rubber powder modified mixture had relatively poor mechanical properties.