ABSTRACT
Bio-materials can replace traditional binders and additives used in the paving industry, which can help to build more resilient transport infrastructures and increase the consumption of secondary materials. Bio Heating Oil (BHO) is a residue of biodiesel production from waste cooking oil and animal fats. It has physical and chemical properties that allow the paving bitumen to improve binder-aggregate adhesion or rejuvenate aged bitumen. The objectives of this work are the study of the rheological and performance characteristics of bio-oil-modified bitumen. A 35/50 paving grade bitumen was modified with five contents of BHO (1, 2, 3, 5, and 10%). The bitumen was studied in unaged and aged conditions to evaluate the BHO ability to act as a rejuvenator of aged bitumen. Ageing treatment was induced by the Rolling Thin Film Oven and Pressure Ageing Vessel protocols. Physical and rheological tests were performed on unaged and aged bitumen. Physical tests include penetration, softening point and viscosity. Rheological behaviour was characterised through strain and frequency sweep tests at different temperatures. Viscoelastic Continuum Damage model was used to analyse the fatigue performance.
