Geopolymer cement has attracted wide interest for use as an alternative to ordinary Portland cement in order to reduce both cost and environmental impact in cement-based construction.However, the majority of geopolymer mixes require a strong alkali solution to activate the reaction and elevated temperature for curing.To improve the applicability of geopolymer, room-temperature-cured geopolymers were made with reduced concentration in the alkali solution using Australian-sourced fly ash and slag.Achieving 87 MPa at 28 days,room-temperature-cured (20℃) geopolymer showed better compressive strength than high-temperature cured (60℃) polymers.By replacing the alkali activator in the mixes with water, the cost, energy consumption and handling risks of the room-temperature-cured geopolymer were reduced.25 wt% replacement showed a slight increase strength to 89 Mpa, whereas 50 wt% replacement reduced the strength to around 60MPa but still produced usable binder material.The results also showed that when compared with naphthalene and lignosulfonate-based superplasticizers, polycarboxylate-based superplasticizers had the least detrimental effect (less than 10% decrease) on strength.An increase in the addition of slag increased the strength of the geopolymer.