In the present study, physico-chemical investigations have been carried out on the possibility of using Cameroonian volcanic or clay pozzolans as raw material for geopolymer or pozzolanic binder. The research had made some suggestive results and conclusions. Powders of less than 100 μm of five sampled pozzolans from volcanic or clay origins have been subjected to chemical and mineralogical analysis, BET specific surface, absolute density, granulometry and pozzolanic activity in solution tests. The results obtained showed that, geopolymers or pozzolanic binders can be produced from samples studied. The samples contain significant amounts of glassy or amorphous phase ready to dissolve in an alkaline solution. The high alkali content of volcanic pozzolans makes them more appropriate for geopolymer application. Clay pozzolans are the easier to grind in order to obtain the appropriate fineness and can be used for both geo- polymers and pozzolanic binders.
 M. J. Shannag and A. Yeginobali, “Properties of Pastes, Mortars and Concretes Containing Natural Pozzolan,” Cement and Concrete Research, Vol. 25, No. 3, 1995, pp. 647-657. doi:10.1016/0008-8846(95)00053-F
 G. Barger, E. R. Hansen, M. R. Wood, T. Neary, D. Beach and D. Jaquier, “Production and Use of Calcined Na tural Pozzolans in Concrete,” Cement, Concrete and Aggregates, Vol. 23, No. 2, 2001, pp. 73-80. doi:10.1520/CCA10478J
 D. D. Vu, P. Stroeven and V. B. Bui, “Strength and Durability Aspect of Calcined Kaolin-Blended Portland Cement Mortar and Concrete,” Cement and Concrete Composites, Vol. 23, No. 6, 2001, pp. 471-478. doi:10.1016/S0958-9465(00)00091-3
 M. Ghrici, E. Kenai and E. Meziane, “Mechanical and Durability Properties of Cement Mortar with Algerian Natural Pozzolan,” Journal of Material Science, Vol. 41, No. 21, 2006, pp. 6956-6972. doi:10.1007/s10853-006-0227-0
 N. Kaid, M. Cyr, S. Julien and H. Khelafi, “Durability of Concrete Containing a Natural Pozzolan as Defined by a Performance-Based Approach,” Construction and Building Materials, Vol. 23, No. 12, 2009, pp. 3457-3467. doi:10.1016/j.conbuildmat.2009.08.002
 R. E. Rodriguez-Camacho and R. Uribe-Afif, “Importance of Using the Natural Pozzolans on Concrete Durability,” Cement and Concrete Research, Vol. 32, No. 12, 2002, pp. 1851-1858. doi:10.1016/S0008-8846(01)00714-1
 B. B. Sabir, S. Wild and J. Bai, “Metakaolin and Calcined Clays as Pozzolans for Concrete: A Review,” Cement and Concrete Composites, Vol. 23, No. 6, 2001, pp. 441-454. doi:10.1016/S0958-9465(00)00092-5
 J. Tailby and K. J. D. MacKenzie, “Structure and Mechanical Properties of Aluminosilicate Geopolymer Composites with Portland Cement and Its Constituent Minerals,” Cement and Concrete Research, Vol. 40, No. 5, 2010, pp. 787-794. doi:10.1016/j.cemconres.2009.12.003
 P. N. Lemougna, K. J. D. MacKenzie and U. F. C. Melo, “Synthesis and Thermal Properties of Inorganic Polymers (Geopolymers) for Structural and Refractory Applications from Volcanic Ash,” Ceramics International, Vol. 37, No. 8, 2011, pp. 3011-3018. doi:10.1016/j.ceramint.2011.05.002
 A. Elimbi, H. K. Tchakoute and D. Njopwouo, “Effects of Calcination Temperature of Kaolinite Clays on the Properties of Geopolymer Cements,” Construction and Building Materials, Vol. 25, No. 6, 2011, pp. 2805-2812. doi:10.1016/j.conbuildmat.2010.12.055
 E. Kamseu, C. Leonelli, D. S. Perera, U. C. Melo and P. N. Lemougna, “Investigation of Volcanic Ash-Based Geo polymers as Potential Building Materials,” Interceram, Vol. 58, No. 2, 2009, pp. 136-140.
 C. Leonelli, E. Kamseu, D. N. Boccaccini, U. C. Melo, A. Rizzuti, N. Billong and P. Misselli, “Volcanic Ash as alternative Raw Materials for Traditional Vitrified Ceramic Products,” Advances in Applied Ceramics, Vol. 106, No. 3, 2007, pp. 135-141. doi:10.1179/174367607X159329
 E. Kamseu, C. Leonelli, D. N. Boccaccini, P. Veronesi, P. Miselli, G. Pellacani and U. C. Melo, “Characterisation of Porcelain Compositions Using Two China Clays from Cameroon,” Ceramics International, Vol. 33, No. 5, 2007, pp. 851-857. doi:10.1016/j.ceramint.2006.01.025
 C. N. Djangang, E. Kamseu, M. K. Ndikontar, G. L. L. Nana, J. Soro, U. C. Melo, A. Elimbi, P. Blanchart and D. Njopwouo, “Sintering Behavior of Porous Ceramic Kaolin-Corundum Composites: Phase Evolution and Densification,” Materials Science and Engineering, Vol. 528, No. 29-30, 2011, pp. 8311-8318. doi:10.1016/j.msea.2011.07.006
 C. Bidjocka, J. Tusset, A. Messi and J. Perra, “Etude et Evaluation de l’Activité Pouzzolanique des Pouzzolanes de Djoungo (Cameroun),” Annales de la Faculté des Sciences de l’Université de Yaoundé, 1993, pp. 133-145.
 Ndigui Billong, U.C. Melo, F. Louvet and D. Njopwouo, “Properties of Compressed Lateritic Soil Stabilized with a Burnt Clay-Lime Binder: Effect of Mixture Components,” Construction and Building Materials, Vol. 23, No. 6, 2009, pp. 2457-2460. doi:10.1016/j.conbuildmat.2008.09.017
 Ndigui Billong, U. C. Melo, D. Njopwouo, F. Louvet and J. P. Bonnet, “Effect of Mixture Constituents on Properties of Slaked Lime-Metakaolin-Sand Mortars Containing Sodium Hydroxide,” Cement and Concrete Composites, Vol. 31, No. 9, 2009, pp. 658-662.
 J. C. Benezet and A. Benhassaine, “The Influence of Particle Size on the Pozzolanic Reactivity of Quartz Powder,” Powder Technology, Vol. 103, No. 1, 1999, pp. 26 29. doi:10.1016/S0032-5910(99)00010-8