A Study on the Influence of Sodium Silicate Concentration and SiO2 : Na2O Ratio on the Properties of Low-Calcium Fly Ash-Based Alkali-Activated Materials Cured at Ambient Condition

Low-calcium Fly ash-based alkali-activated materials (AAM) have some extraordinary properties such as high fire resistance and low shrinkage. However, they lower strength setting time when curing at ambient temperature conditions. Therefore, this research aimed to improve the of low-calcium fly AAM The effect changes in concentration modulus sodium silicate condition were studied on AAM. ash type II, 32% metasilicate pentahydrate, 32 56% disilicate solution, 8M hydroxide, standardized used. Using solution significantly improved flowability mortar. Moreover, it increased compressive remarkably decreased curing. decrease has a significant influence reactivity ash.