ABSTRACT: This research aims to investigate the influence of silica fume (SF) additives in the mortar mixes on seawater intrusion through the AC electrical conductivity and dielectric constant measurements using complex impedance technique. Silica fume has been used as a partial replacement percentage 0, 5, 7, 10, 12, 15, 20 and 25% from cement weight in mortar with water to cement ratio, (w/c), 0.4. Measurements were performed at 295
