Author(s)

Seick Omar Sore^1,2, Adamah Messan^2*, Elodie Prud’Homme³, Gilles Escadeillas⁴, François Tsobnang²

¹Université Nazi BONI (UNB), Bobo-Dioulasso, Burkina Faso.
²Institut International d’ingénierie de l’Eau et de l’Environnement (2iE), Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD), Rue de la Science, Ouagadougou, Burkina Faso.
³Université de Lyon, Matériaux: Ingénierie et Science (MATEIS), INSA Lyon, Villeurbanne, France.
⁴Université de Toulouse (UPS, INSA), LMDC (Laboratoire Matériaux et Durabilité des Constructions), Toulouse, France.

This study specifically investigated the influence of the composition of aluminosilicate material i.e. the substitution of metakaolin by rice husk ash and the nature of alkaline activators (Na⁺/K⁺) on mineralogical, structural, physical and mechanical properties of geopolymer binders. This influence was evaluated based on X-ray diffraction (XRD), Fourier Transform InfraRed spectroscopy (FTIR) and Scanning Electron Microscope (SEM analyses, apparent density, water accessible porosity, compressive strength and thermal properties. Two types of geopolymer binder were synthesized according to the type of alkali activator used, the NaOH-based geopolymer and the KOH-based geopolymer. The results of characterization performed after 14 days of curing of geopolymer samples showed that the activation of the aluminosilicate powder using alkaline solution led to change in their microstructure. The highest compressive strength was obtained with the NaOH-based geopolymer.

Geopolymer, NaOH, KOH, Metakaolin, Rice Husk Ash, Compressive Strength

Sore, S. , Messan, A. , Prud’Homme, E. , Escadeillas, G. and Tsobnang, F. (2020) Comparative Study on Geopolymer Binders Based on Two Alkaline Solutions (NaOH and KOH). Journal of Minerals and Materials Characterization and Engineering, 8, 407-420. doi: 10.4236/jmmce.2020.86026.