Assessing the Impact of Micro and Nano Size Additives on the Dissipated Energy of Asphalt Concrete Through Fatigue

In the present assessment, the impact of micro and Nano size additives (fly ash and silica fumes) on the dissipated energu of asphalt concrete mixtures through the fatigue process was assessed. Beam specimens were tested for fatigue under three constant strain levels using four point bending beam technique.It was observed that the damage resistance for the silica fumes and fly ash treated mixtures as indicated by the increment in dissipated energy declines by (50 and 91) % and (20 and 90) % at 400 and 750 microstrain level respectively as compared with that at 250 microstrain level. The fatigue life at 750 microstrain level increases by (66.6, and 50) %for mixtures treated with fly ash and silica fumes respectively as compared with the control mixture. It was concluded that at higher dissipated energy level, the implemented additives exhibit no significant influence on permanent deformation as compared with the control mixture