Performance evaluation and comparison of waste crumb rubber/C9 petroleum resin composite modified high viscosity asphalt and its mixture

Abstract

In order to improve the viscoelasticity of waste rubber powder （WCR） modified asphalt, WCR/C9 petroleum resin （C9PR） composite modified high viscosity asphalt binder and its mixture were prepared, the physical properties and storage stability of the modified high viscosity asphalt binder were investigated. At the same time, the properties of its OGFC-13 mixture were evaluated by general road performance test, dynamic creep test, Overlay test and indirect tensile fatigue test, and it was compared with common WCR modified asphalt and commercial high viscosity asphalt binder and their mixture. The results showed that WCR/C9PR high viscosity asphalt had the advantages of high softening point and viscosity, good storage stability and elastic recovery, and its performance was much better than that of common WCR modified asphalt. WCR/C9PR high viscosity asphalt mixture had good high and low temperature performance, water stability, shear deformation resistance, reflection crack resistance and fatigue crack resistance, which was comparable to that of commercial high viscosity asphalt mixtures and could meet the technical index requirements of porous pavements.

Keywords

• high viscosity asphalt
• waste crumb rubber
• c9 petroleum resin
• composite modification
• mixture
• fatigue performance
• road performance