In order to study the viscoelastic characteristics of asphalt mixtures in the w hole2frequency range, a dynamic shearing rheometer is used to carry out dynamic frequency sweeps for asphalt mixtures, which obtains the three dimensional relationships among G , temperature and frequency. Then the time temperature shift principle is used to translate the relationships from three dimensions to two dimensions, so m aster curves are obtained regarding dynamic modules changing along with the frequency over 15 amount levels. The Christensen Anderson Marasteanu (CAM ) model, a kind of the rheological model, is used to analyze and compare rheological performances of several asphalt mixtures based on the obtained m aster curves. The results indicate that the dynamic rheological test is an effective method for obtaining the m aster curve. Besides, the CAM model can describe well the viscoelastic deformation characteristics of asphalt mixtures.

       Key words: asphalt mixture; CAM model; m aster curve