The Application and Optimization Research of Steel Deck SMA Asphalt Pavement

In recent years, SMA often used for Orthotropic Steel Box Girder Bridge deck pavement on the surface,but the effect is not ideal. The analysis and research based on SMA which in the steel bridge deck layer in domestic steel box girder bridge has built the application effect of SMA surfacing. From the angle of mixing gradation optimization to analysis, through the laboratory test to comparing the asphalt mixture conventional index, rutting of road performance index of different schemes, and the compound beam fatigue test get the best combination scheme of asphalt mixture pavement performance. Experiments show that asphalt mixture adopted high adhesive modification has better performance than SBS modified. Fatigue resistance and high-temperature stability were greatly improved by choose different additives. This is also provides basis for the application of SMA in the steel bridge deck pavement improving.