Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders

摘要: Bitumen is a viscoelastic material that exhibits both elastic and viscous components of response displays temperature time dependent relationship between applied stresses resultant strains. In addition, as bitumen responsible for the behaviour all bituminous materials, it plays dominant role in defining many aspects asphalt road performance, such strength stiffness, permanent deformation cracking. Although conventional materials perform satisfactorily most highway pavement applications, there are situations require modification binder to enhance properties existing material. The best known form by means polymer modification, traditionally used improve susceptibility bitumen. Tyre rubber another using recycled crumb tyre alter alternative binders (synthetic polymeric well renewable, environmental-friendly bio-binders) have entered market over last few years due concerns continued availability from current crudes refinery processes. This paper provides detailed rheological assessment, under regimes, range conventional, modified terms dynamic (oscillatory) response. results show improved polymer- rubber-modified increased complex shear modulus response, particularly at high temperatures low frequencies. synthetic were found demonstrate relative seen binders.