Samenvatting

Concrete made with geopolymer binders instead of conventional Portland cement is called geopolymer concrete. It is an alternative to conventional concrete and has several advantages in terms of material performance and environmental sustainability. In this study, the geopolymer concrete mixtures were prepared with different water-fly ash ratios and cured under ambient conditions and high temperatures in the oven. Slump and compressive tests were carried out to analyse the effects of the water-fly ash ratio and curing conditions.
Experiment results show that different water/fly ash ratios influenced the workability, and different curing conditions influenced the strength of the geopolymer concrete. The compressive strength was higher at heat-cured samples in 7 days. Similarly, a higher waterfly ash ratio gave better workability. The compressive strength of up to 45MPa was recorded at heat curing in seven days, and 18MPa was recorded at ambient temperature in 28 days.