Rheological aspects of the rejuvenation of aged bitumen

摘要: Rheological techniques are used to investigate the rejuvenation of aged bitumen. The thermal transition associated with collapse compact structure constituted by asphaltene is determined Dynamic Mechanical Thermal Analysis. For bitumen, this shifts a higher temperature but when rejuvenating agents added, returns its original value. “rutting factor,” G*/sin δ allows define maximum binder can reach without permanent deformation. employed suitable because deformation postponed. Viscosity results reveal that bitumen needs high mixing (>200°C) behave like fluid material able wet, adhere, and envelop aggregates. addition considerably reduces compaction temperatures. mixture 80% bitumen—20% recycled motor oil, obtained exclusively from waste materials an apt compete satisfactorily new 60/70