Study on High Temperature Properties of Fiber-Free SMA Mixture

The high temperature performance of asphalt mixture is an important factor to determine pavement life. Through rut test, dynamic modulus test and repeated load creep the high-temperature properties two kinds SMA mixtures were compared by different indexes, characteristics non-fiber evaluated. stability slope curve showed that had advantage in development rate with ordinary SMA. estimated road life flow number Fn based on rutting could bear nearly 80% more standard axle than normal 11%. When permanent deformation reaches failure stage, can loads. main curves moduli at reference temperatures are basically same, characterizing mechanical have little difference. Compared mixture, film thickness surface thinner, skeleton effect between coarse aggregates prominent, which reason for improvement mixture.