The majority of engineering issues in Ozuitem (Isiegbu) stem from construction engineers' negligence in assessing and mitigating the impact of expansive soils on engineering structures. Cement stabilization is a very important soil improvement technique which serves as solution to expansive soil (clay) on engineering structures by bringing important modifications/stability to their engineering properties before it can be considered a good foundation/subgrade material for construction of light weight structures. This study aims at analyzing the effects of using cement as additives for improving the geotechnical properties of expansive soil derived from Ameki Formation in Ozuitem (Isiegbu) near Bende Southeastern Nigeria, so as to reduce their swelling potentials and inversely increase its strength characteristics. The study examined the untreated geotechnical properties of expansive soil sampled from Ozuitem (Isiebgu) representing Ameki Formation, cement was introduced at 2%, 4%, 6%, 8% and 10% respectively serving as a stabilizing agent. Geotechnical tests were repeated after cement was added to determine the effects of using cement additive on cohesive soils of Ameki formation and we achieved an optimal soil-cement stabilization at 8% cement addition revealing liquid limit (51.90% - 35.50%), plasticity index (24.60% - 5.00%), linear shrinkage (14.00% - 7.20%), Maximum dry density (1.52Mg/m3 - 1.75Mg/m³), unsoaked CBR (10.04% - 25.10%) and soaked CBR (4.60% - 23.44%) conforming with federal ministry of works and housing specifications for roads and bridges. Results obtained showed significant reduction on its swelling potentials (LL, PI & LS) and increasing strength characteristics on CBR and MDD (strength potentials) of the soil.