Asphalt Road Surface Interlayer Shear Performance Test

With weight and tire pressure increases, early damage to asphalt pavement becomes more and more serious, interlayer shear performance of the asphalt pavement surface which causes more and more the attention of people is closely related to it. At present, both at home and abroad the influencing factor analysis and the evaluation index of the shear performance of the asphalt pavement surface are less study. Using self-made shear test equipment, the paper researched road surface interlayer shear resistance of ordinary asphalt, rubber powder modified asphalt, and SBS modified asphalt and analyzed that the viscosity, softening point, the needle into the degree - viscosity index impact on the internal friction angle of interlaminar shear parameter φ, bond force c, and the shear strength τ. Result of analysis shows that the softening point and viscosity index have the significant impact for the shear strength, and the internal friction angle phi of interlaminar shear parameter φ plays a key role for the asphalt pavement surface shear strength; softening point and viscosity of asphalt have good correlation with the shearing deformation of asphalt pavement surface interlamination and the higher temperature stability of asphalt causes the better ability of asphalt pavement surface interlamination.