Influence of rice husk ash substitution on some physical, mechanical and durability properties of the metakaolin-based geopolymer mortar

In this study, it is aimed to investigate the influence of rice husk ash, which a waste by-product industrial production, on ultrasonic pulse velocity, compressive strength, flexural strength and high temperature endurance metakaolin-based geopolymer mortar. For this, sand was substituted by ash (RHA) at rate 25%, 50% 75% wt. in production A total 4 series mortars (reference three with RHA substitution) were produced. geopolymer, other words, binder mortar produced metakaolin ground granulated blast furnace slag reacting mixture sodium hydroxide (12M NaOH) silicate (Na2SiO3) solutions. The ratio reactant NaOH + Na2SiO3) determined for each following preliminary experiments. On specimens as 50 mm cube 40 x 160 prism, intended experiments carried out after underwent curing dry oven 60oC during 72 h gained strength. results showed that could be used filling material mortars, substitution can an alternative pure