Sedimentation in reservoirs causes environmental and economic issues. When dredging becomes necessary, reuse of the dredged sediments may reduce the high costs and environmental impacts associated with this process, reduce dependency on natural materials and support the concept of resources circular management. The main object of this research is to explore the possibility of using sediments from the Siliana dam reservoir, which has reached its half-life, in road construction. Samples taken from the sediments undergo geotechnical, and mechanical characterization. The sediments are classified considering their physical properties, including water content, grain size distribution, liquid and plastic limits, organic matter content, and methylene blue adsorption, as well as the standard Proctor compaction test and the California Bearing Ratio (CBR) test. The studied samples are mainly composed of fine sand, silt, and clay, with medium to high plasticity and low organic matter content. These sediments have geotechnical characteristics that make them unsuitable for direct use as embankments or as road foundation layers. Indeed, their high water content and low bearing capacity require improvements to meet road construction standards. The incorporation of different percentages of hydrated lime into the Siliana dam sediments suggests that an addition of 5% hydrated lime is sufficient to achieve the desired bearing capacity.