Study on refractory materials application using geopolymer processing

Abstract

Geopolymer is cementitious binders that do not require the presence of ordinary Portland cement (OPC). Class F fly ash with geopolymer formulations prepared with an alkaline activator (mixture of Na2SiO3 and NaOH solutions) has been applied as protective coating material that suitable for refractory materials application. Geopolymer coating samples were cured at 70°C for 24 hours before sintered using temperature range from 600°C to 1500°C in order to increase strength and improve thermal properties. Geopolymer coating samples cures to a glassy texture and effectively used to create a resistant surface. Fly ash geopolymer coating was improved the compress ve strength of the coatings materials as high as 40 MPa.