In this study, alkali-activated cement was fabricated by utilizing blast furnace slag (BFS) and fine kaolin dust (KD). Various fabricated mixes were made by replacement of BFS by 0, 20, 40, 60 and 80% of KD. The utilized alkaline activator was a mixture of NaOH and Na₂SiO₃ with molar ratio 1:1. The prepared specimens were cured in air for up to 90 days. All specimens were characterized with regard to setting times, compressive strength and water absorption. The formed hydrates were explored using X-ray diffraction (XRD) analysis, Fourier-transform infra-red (FTIR) spectroscopy and scanning electron microscope (SEM) techniques. The durability of the prepared geopolymer was determined by studying its resistance against firing and against sulphate ions. The results indicated that the specimens made from 60% BFS and 40% KD and activated by (1:1) NaOH and Na₂SiO₃ showed the best overall behavior.

Buy this Article