Properties of Alkali-Activated Fly Ash Concrete Blended with Slag

The current research aims to investigate alkali-activated fly ash (AAFA) concrete/mortar modified with granulated ground blast-furnace slag (slag). FA was partially replaced with slag at levels of 0, 5, 10 and 15%, by weight. The workability and mechanical properties of alkali-activated concretes were studied. Drying shrinkages of alkali-activated mortars were investigated. All results of alkali-activated FA/slag concretes/mortars were compared to control concretes/mortars based on plain AAFA. The results indicated that the workability decreased as the slag content increased. Mechanical strengths and drying shrinkages increased with increasing slag content.