Abstract : Soil used in earthwork is typically rated as “excellent-to-good” when it effectively supports building foundations, embankments, pavements, and other civil infrastructure. Expansive clays are problematic soils due to their tendency to swell and shrink under varying moisture “conditions”, and represent a significant challenge in geotechnical engineering, often resulting in considerable economic losses for construction projects. These soils exhibit high vulnerability to failure mechanisms, including excessive settlement and subgrade instability, which exacerbate their performance issues compared to other soil types. Given the scarcity of suitable construction sites, improving the engineering properties of these soils is imperative for their application in construction projects. Stabilization techniques play a crucial role in enhancing the characteristics of native or granular soils used in pavement layers. This study presents an experimental investigation into the combined effects of admixtures, specifically RoadCem and cement, on the geotechnical properties of expansive soils. The findings revealed that the incorporation of these stabilizers resulted in an increase in optimum moisture content (OMC), a decrease in maximum dry density (MDD), and significant improvements in unconfined compressive strength (UCS) and California Bearing Ratio (CBR).