This study investigates the effect of using Fume Silica (Aerosol 300) alone and together with crumb rubber (CR) in bitumen modification on traditional rheological properties binder compares it to SBS modified binder. Using aerosol additive at rates 0.5%, 1%, 1.5%, 2% were determined as most convenient ratio CR+aerosol binders prepared per this ratio. The subjected softening point, viscosity, fr...