Investigating the Impact of Implication of Additives on Rheological Properties of Asphalt Cement

Abstract

Asphalt cement binder loses the required cohesion, flexibility, and its adhesion to the aggregates throughout its service life. Implication of additives can create a green binder and control its sustainability by enhancing the quality of the binder and extending its useful life. In the present investigation, two types of asphalt binder with penetration grade (40-50 and 60-70) were treated with (hydrated lime and coal Fly ash). The modified binders practiced the rheological properties determination in the laboratory. It was detected that for binders of penetration grade of (60-70) and (40-50), the penetration viscosity number (PVN) declines by (0.6, and 1.7) % and (1.4, and 2.8) % for (hydrated lime and coal Fly ash) treated binders respectively. For the binder of penetration grade of (40-50), the penetration index (PI) increased by 72.4 % when coal fly ash was implicated while the (PI) values declines by 25.3 % when hydrated lime was implicated. However, for (60-70) binder, the penetration index increases by (3, and 72.9) % when hydrated lime and fly ash were implemented respectively. For (40-50) and (60-70) asphalt binder, the viscosity increases by (5.8, and 43.6) % and (102.5, and 12) % for (Fly ash, and hydrated lime) treated binder respectively.