The Effect of Sodium Hydroxide Molarity and Other Parameters on Water Absorption of Geopolymer Mortars

Abstract

Durability one of the critical role effect in geopolymer serviceability. The capability of water to penetrate the GPMs microstructure is mainly used to measure the durability, which also called permeability. The permeability effect on the chemical stability of mortar, higher amount could acted to the introduction of molecules that react and destroy the stability. This paper presents an experimental investigation on the influence of sodium hydroxide (NaOH) molarity, alkali solution to binder ratio (S:B), binder to aggregate ratio (B:A) and sodium silicate to sodium hydroxide ratio (NS:NH) on water absorption of geopolymer mortar (GPMs). Geopolymer mortar specimens of different NaOH molarity, S:B, B:A, and NS:NH were prepared at different curing temperatures, 27 ° C and 60 ° C. Granulated blast furnace slag, fly ash (low calcium), waste ceramic and waste glass bottle were used as a