Álvarez Mantilla, H., C. A. Rios Reyes, and O. M. Castellanos Alarcón. “Physicomechanical Properties, Performance and Durability of Colombian Natural Puzzolan of Pumice-Type Based Geopolymer Mortars”. INGE CUC, vol. 17, no. 1, Feb. 2021, pp. 216-29, doi:10.17981/ingecuc.17.1.2021.17.