VISCOSITY OF BITUMEN-CRUMB RUBBER BLEND (NEW PAVING MATERIAL)

摘要

The feasibility of blending scrap tire rubber with Asphalt Ridge and Circle Gifts (Utah, USA) tar sand bitumens was studied. Viscosity of the blended mixtures was analyzed as a function of composition, and co- processing variables including processing temperature and time. Co- processing of tar sand bitumens with crumb rubber at elevated temperatures has been shown to increase the viscosity of the bitumens with the exception of the bitumen-rubber sample prepared at 380℃. Optimum viscosity behavior was exhibited for an oil-extended bitumen blended with crumb rubber at 200℃ for 0.5 hours.