Preparation Method Of Geopolymers Based On Red Mud, Fly Ash And Flue Gas Fly Ash Product Suitable For Civil Engineering Applications
Author: Dumitru Doru BURDUHOS NERGIȘ, Andrei Victor SANDU, Madalina-Simona BALTATU, Dragos-Cristian ACHITEI, Manuela-Cristina PERJU, Diana-Petronela BURDUHOS-NERGIS, Andriana SURLEVA, Petrica VIZUREANU
Company/Institution: Gheorghe Asachi Technical University of Iasi
Country: Romania
The process according to the invention for making the environmentally friendly geopolymer consists of mixing two components, one solid and one liquid, whose composition is as follows: the solid component consists of 30-35% class F fly ash, 10-15% thermal power plant desulphurization product, 45-50% red mud, and the liquid component consists of Na2SiO3 solution and NaOH solution in a mass ratio of between 1.25 and 1.5; the mass ratio between the liquid and solid components is between 0.65 and 0.75, and the concentration of the NaOH solution is 10M or 3M. In the case of 10M concentration, the final set time is about 30 minutes, and in the case of 3M concentration it is about 100 minutes, making it also suitable for 3D printing.
