Mechanical and durability properties of alkali-activated fly ash concrete with increasing slag content

Alkali-activated concrete is a promising alternative to conventional Portland cement-based concrete. However, further understanding in relation to the durability of alkali-activated concrete is required. This paper explores the resistance of alkali-activated concrete mixes to aggressive media that concrete is expected to encounter in-service. Findings indicate that the chloride, freeze-thaw and acid resistance of alkali-activated concrete increases as the slag content and activator increased. However, performance against chloride and freeze-thaw was not as good as that of Portland cement concrete. Acid resistance seems to be a more promising characteristic of alkali-activated concrete compared with Portland cement concrete.