Investigating the possibility of utilizing pumice-type natural pozzonal in production of geopolymer cement

Autores: Allahverdi, A.|Mehrpour, K.|Kani, E.N.
Fuente: Ceram. silik.
52 (1), 16-23

Natural pozzolans are aluminosilicate-type materials which can be activated with solutions of NaOH and Na2SiO3. Using a pumice-type natural pozzolan and different alkali-activators based on combinations of Na2SiO3 and NaOH, a number of geopolymer cement systems were designed and studied. Water-to-dry binder ratio, silica modulus, and sodium oxide concentration of the systems were adjusted at different levels and setting time, workability, and 28-day compressive strengths of the systems were studied. The results obtained reveal that natural pozzolans of pumice-type can be activated using a proportioned mixture of Na2SiO3 and NaOH resulting in the formation of a geopolymer cement system exhibiting suitable workability and acceptable 28-day compressive strengths. All the measured final setting times are acceptable compared to standard values given for Portland cement.

Si desea obtener más información sobre este contenido contacte con nuestro Centro de Documentación

Regístrate para leer más