This study examines the effects of integrating silica fume powder with grade 40–50 asphalt cement at various amounts. Laboratory studies were performed to assess the appropriateness of modified asphalt for paving applications. The study experimented with three different percentages of silica fume powder (2%, 4%, and 6%), with the mixtures being continuously stirred and heated at 170 ℃ for 30 min. The objective was to assess the performance and feasibility of using modified asphalt cement for road construction. Asphalt binders obtained from northern Iraq (Al-Sahil Refinery) were selected for characterization and property enhancement through the application of various modifiers. Through the course of this research, the physical properties of modified asphalt were evaluated. These properties included penetration, ductility, softening point, and rotational viscosity, and elastic recovery, prior to and subsequent to the incorporation of silica fume in varying quantities (2%, 4%, and 6%). The results showed that all additive ratios decreased the penetration by (9.3, 20.9, and 30.2) % at silica fume (2, 4, and 6) % respectively for the control specimen, and ductility values of the asphalt binder decreased by (10.6, 21.3, and 27.1) % at silica fume (2, 4, and 6) % respectively for the control specimen. However, the softening point increased by (3.7, 9.4, 15.1) % at silica fume (2, 4, and 6) % respectively for the control specimen, and rotational viscosity increased with the addition of all tested proportions of additives at temperature 135 ℃. The results showed that all additive ratios increased elastic recovery at silica fume (2, 4, and 6) % respectively for the control specimen.