Application Research of Asphalt concrete composite structure in the bridge deck pavement

Asphalt concrete composite structure has important influence on the performance of bridge deck pavement road. In order to optimize the design the surfacing layer composite structure, using the thick type rut test, direct shear test and low temperature bending test to verifies the performance of asphalt concrete; Empirical research indicates that the dual SMA composite structures has significant advantages in the high temperature stability, shearing and anti-crack performance; Above and below layer structure type has a decisive role to the high temperature anti-rutting and the low temperature crack resistance, respectively. Rubber powder modified asphalt improves the layer structure of high temperature and low temperature performance, but it can't improve the shear resistance. Summarize research results, Bridge overlay is a special pavement structure, which recommended according to maximum grain with small top and big bottom double SMA structure combinations, to solve the current bridge deck pavement premature problem such as rutting, goes on to provide technical support.