MICROSTRUCTURE OF GEOPOLYMER MATERIALS BASED ON FLY ASH

Abstract

4(4Si)and SiQ 4 (3Al) and SiQ 4 (2-3Al). Any presence of the temporary phase with different composition was not found between geopolymer and aggregate as it is at the concretes from Portland cement. Geopolymer composition is almost the same in the close nearness even in the geopolymer matrix. Elastic modulus evaluated for the mixed geopolymeric and C–S–H phase by means of nanoindentation was found to be E= 36.1 ± 5.1 GPa. Such result is comparable (a little bit higher) to ordinary Porland cement pastes.