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

Author(s):: ZHU Xiao-fei; School of Architecture and Urban Planning, Henan University of Urban Construction, Pingdingshan 467036, China

Keywords:: high viscosity asphalt; waste crumb rubber; C9 petroleum resin; composite modification; mixture; fatigue performance; road performance

摘要:: 为提高废胶粉（WCR）改性沥青的黏弹性能，研制了WCR/碳九石油树脂（C9PR）复合改性高黏沥青及其混合料，考察了改性高黏沥青的物理性能和储存稳定性，同时通过一般路用性能试验、动态蠕变试验、疲劳拉伸试验和间接拉伸疲劳试验评价了其OGFC-13混合料的性能，并与普通WCR改性沥青和市售高黏沥青及其混合料进行了对比。结果表明，WCR/C9PR高黏沥青具有软化点和黏度高、储存稳定性和弹性恢复好等优点，性能明显优于普通WCR改性沥青；WCR/C9PR高黏沥青混合料具有良好的高低温性能、水稳性能、抗剪切变形能力、抗反射裂缝性能和抗疲劳开裂性能，与市售高黏沥青混合料性能相当，可满足排水路面的技术指标要求。

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.