Influence of soft binder and rejuvenator on the mechanical and chemical properties of bituminous binders

Abstract At the end of their service life, asphalt pavements exhibit distresses such as cracking and ravelling due to aged bituminous binder. The recycling process reclaimed should compensate for deteriorated binder properties. main objective this study is compare two common strategies: use a softer rejuvenator. Three percentages, 0%, 40% 70% were evaluated. All blends prepared with similar penetration softening point values. In order simulate performance during ageing protocols by means rolling thin film oven test pressure vessel performed. investigation included both mechanical chemical tests. A dynamic shear rheometer was used assess different rheological parameters over an extensive temperature range. Linear amplitude sweep tests performed estimate fatigue resistance at intermediate temperatures. Resistance permanent deformation assessed multiple stress creep recovery test. Fourier-transform infrared spectroscopy formation bonds that indicate oxidative after protocols. Moreover, optimised method introduced calculate carbonyl index rejuvenated binders, which also allows detect presence rejuvenator in results show inclusion behaviour compared application soft Furthermore, improves life without reducing elevated