Overweight Traffic Skeleton Dense Structure Of Asphalt Mixture

Through Marshall tests and wheel tracking tests, coincidence relationship between CA Ratio of the Bailey Method and packing effect of coarse aggregate was validated in this paper. Then numeric area of CA Ratio correspond to optimum packing effect of coarse aggregate was put forward respectively. Combined with road performance analysis of two types of asphalt mixture, a design method for dense framework structured asphalt mixture was put forward. At the same time, test road was paved successfully, surface of the test road showed a smooth, uniform and coarse appearance without any segregation phenomenon.At last, wheel tracking tests with different wheelpressure were carried out to study the high-temperature stability of dense framework structured asphalt mixture under condition of super overloading. Regulation between asphalt mixture's dynamic stability and wheelpressure was put forward. Considering at the aspect of asphalt mixture's high-temperature stability, standard of wheelpressure was put forward.