Abstract
•Water absorption and permeability porous were markedly improved with the addition of steel fibres.•Superplasticizer (naphthalene-based) improved workability and compressive.•SF in AAS matrix decreased workability and increased compressive strength.•10% PC in AAS gave higher compressive strength and the lowest drying shrinkage.•Gypsum in AAS reduced drying shrinkage, setting time and increased compressive strength.
The development of new binders, as an alternative to Portland cement (PC), by alkaline activation, is a current researchers interest. Alkali-activated slag (AAS) binder is obtained by a manufacturing process less energy-intensive than PC and involves lower greenhouse gasses emission. AAS belongs to prospective materials in the field of Civil Engineering. Researchers have employed fibres, chemical admixtures, mineral admixtures and other materials as additives in AAS system aiming to modify some properties of this system. This paper presents a comprehensive overview of the previous works carried out on using different additives in AAS system.