Viscoelastic behaviors of high-viscosity rubberized bitumen containing waste cooking oil

With the modification of crumb rubber (CR), the viscosity and elasticity of asphalt binder will be significantly enhanced. This study used waste cooking oil (WCO) to adjust the chemical fractions in the prepared CR modified asphalt binder (CRMA) for the purpose of reaching a better viscoelastic behavior. Further, the viscoelastic behavior of CRMA incorporated with 4% WCO was investigated and evaluated by constructing reliable master curves from outputs of the classical Christensen-Anderson model. The findings obtained indicated that the use of 4%WCO into CRMA binder just causes a limited decrease of the complex modulus, and in this case, the resulting binder still remains applicable to stand with the resistance to deformation from outside repeated forces; both raising temperature and incorporating WCO can be able to produce similar effects on the viscoelastic transition of CRMA binder approaching to higher frequency; once the environmental condition surpasses the viscoelastic transition temperature of CRMA binder, or WCO is added, the viscous behavior will be switched to a lower temperature; the Christensen-Anderson model is verified available and supportively recommended for viscoelastic analyses of binders.