Method for evaluating high-temperature performance of asphalt mixture

The invention discloses a method for evaluating the high-temperature performance of an asphalt mixture, which is used for evaluating the high-temperature anti-rutting performance of the asphalt mixture, and the asphalt mixture is the same type of asphalt mixture with different gradation or different types of asphalt mixture with the same gradation. The method comprises the following steps: step 1, determining the gradation of an asphalt mixture and the asphalt-aggregate ratio corresponding to the asphalt mixture, and forming a plurality of cylindrical test pieces according to the determined gradation of the asphalt mixture and the asphalt-aggregate ratio corresponding to the asphalt mixture; step 2, testing compressive strength RC and indirect tensile strength RT of each cylindrical test piece; step 3, calculating a cohesive force value c and an internal friction angle value of each cylinder test piece; and step 4, calculating a high-temperature performance value psi of each cylinder test piece, and evaluatin