Potential Applications of Débélé Clays (Guinea): Formulation of Ceramic Compositions and Hydraulic Binders

This study demonstrates the potential uses of two clays collected from Débélé (Guinea). Based on their physicochemical properties, ceramic and hydraulic binder formulations were carried out. The physicomechanical properties of ceramic specimens and cements based on these clays attest to their use in these different fields. Both varieties are suitable for dense ceramic compositions with good dimensional stability on firing. In addition, the melting character of the mineral muscovite, the second main constituent of these clays, contributed to geopolymer gel formation and product compactness. These results also attest to the pozzolanic and amorphous character of Débélé clays, containing over 50% clay minerals, and their application in the formulation of hybrid cements and geopolymer binders. Key words: Clay, hydraulic binder, ceramic, geopolymer, physicomechanical properties.