The objective of this article is to provide an insight into a new composite bonding system of Cement/emulsified-Asphalt/Epoxy resin (CAE) for steel box girder bridge pavement. The effect of epoxy resin on emulsified asphalt mixtures added with cement has been investigated in laboratory. Besides the mechanical properties of mixtures using CAE binders, the microscopic feature of CAE binders also have been measured. The results of mechanical tests indicate good performances for pavement, especially rutting deformation at high temperature and adhesive strength with steel blocks. Then, microscopic images show some interesting microscopic feature, which could be related to the development of performances.