Effect of Bitumen Production Process and Mix Heating Temperature on the Rheological Properties of Hot Recycled Mix Asphalt

Heavy traffic loads require the replacement of damaged pavements, so a huge amount reclaimed asphalt pavement (RAP) material is now available and must be recycled in order to avoid landfill achieve both environmental economic benefits. The most common profitable solution reuse RAP associated with hot recycling technique, as it allows recovering solid binding components RAP. Several factors influence performance mix (HRMA). Among those, this paper focuses on role played by origin virgin bitumen, i.e. oil-distillation process, mixing temperature adopted during HRMA production. objective was evaluate rheological properties mixtures produced using high (50%), two different rejuvenators, temperatures (140 °C or 170 °C) neat bitumen types derived from distillation processes (visbreaker straight-run). results showed that addition led an increase dynamic modulus decrease phase angle, while use rejuvenators partly tended rebalance these characteristics. visbreaker higher sensitivity short-term aging than straight-run, determining stiffness lower viscous features. also determined complex reduction angle result mobilization aged