Correlation Analysis between Viscoelastic Mechanical Properties and Volume Indicators of Asphalt Mixture

Abstract

Dynamic modulus, repeated shearing flow and indirect tension creep compliance are three typical viscoelastic properties of asphalt mixture. Deriving from the correlation between volume indicators of asphalt mixture and viscoelastic mechanical properties is of great significance. 56 common mixtures used in Hebei province were subjected to test dynamic modulus, repeated shearing flow, indirect tension creep compliance. Correlation analysis between viscoelastic properties and volume indicators were conducted under a generalized visual angle. Results show that, voids in mineral aggregate (VMA) is the generalized indicator that affects dynamic modulus yielding a negative correlation; voids filled with asphalt (VFA) is the generalized indicator that affects shearing flow slope yielding a negative correlation; VFA is the generalized indicator that affects creep compliance yielding a negative correlation. A preliminary new design frame was developed taking into account the correlation between volume indicators of asphalt mixture and viscoelastic mechanical properties.