Experimental assessment and optimization of mix parameters of fly ash-based lightweight geopolymer mortar with respect to shrinkage and strength

The aim of the study is to determine the impact of various NaOH molarities, sodium silicate-to-sodium hydroxide ratios, binder amounts and the age on the compressive strength and free shrinkage of fly ash based lightweight geopolymer mortars. After experimental evaluation, the data were used to model and optimize mix proportions of lightweight geopolymer mortars through response surface method. NaOH molarities were determined as 6 M, 8 M, and 10...