Effect of Increasing the Molarity Concentration and Curing Time on Strength and Durability of Geopolymer Mortar

Abstract

This paper presents the effect of increasing the molarity concentrations and curing time for
strength and durability of flyash based geopolymer mortars activated using combined sodium
silicate and sodium hydroxide solutions. Keeping NaOH concentration as 8M, 10M and
curing time as 24hrs, 48hrs totally nine mixes were prepared. Compressive strength, Split
tensile strength and Rapid Chloride Penetration tests were conducted on each of the nine
mixes. Results of the experimental study showed that there was an increase in compressive
strength and split tensile strength with increase in NaOH concentration and curing time.
Compressive strength up to 52.28 MPa was obtained with curing at 75C for 10 molarity geopolymer mortar.