Improper waste management generates significant environmental, health, and economic consequences. As such, waste valorization emerges as a sustainable solution. In Benin, the increasing demand for road construction materials amid the depletion of conventional resources has encouraged the use of enhanced local materials. Barre soil, which is abundant yet limited by its low bearing capacity and high-water sensitivity, and ceramic waste, which is both plentiful and pozzolanic, present a promising combination. This study investigates the potential of pulverized ceramic waste to stabilize barre soil from Tori-Dokanmey. The methodology involves initial soil characterization, preparation of ceramic waste through crushing, grinding, and sieving to 0.08 mm, blending with the soil at proportions ranging from 2.5% to 15%, followed by geotechnical laboratory testing. The results indicate that untreated barre soil is unsuitable for road construction (48% fines), but becomes compliant at 7.5% ceramic content (28% fines). The plasticity index decreases to 13% at 12.5% ceramic content, reflecting improved material stability. The maximum dry density increases to 2.10 t/m³ at 15%, while the CBR index improves from 23% to 48%, qualifying the mixture for use as a sub-base layer for traffic classes T1 through T5. In conclusion, the incorporation of 7.5% to 15% ceramic waste significantly enhances the engineering properties of barre soil, making it compliant with CEBTP standards for road construction, while also contributing to sustainable waste management practices. Keywords: Barre soil, ceramic waste, stabilization, plasticity index, CBR index
COOVI ROCAMBOLS THEDE AGBELELE, VALERY KOUANDETE DOKO, MOHAMED GIBIGAYE