Alkali-activated slag concretes. Mechanical and durability behaviour

Abstract

The present study aimed to evaluate the mechanical strengths and durability in alkali activated slag concretes (AASC) using a solution of sodium silicate hydrate as activator. The behaviour of these concretes, in terms of strength and development of porosity, was comparable to the performance observed in ordinary Portland cement concretes. The trials conducted in this study showed that alkali-activated slag concretes exhibited good durability against chloride permeability (UNE 83987) and good adherence behaviour of corrugated steel bars (pull-out test) comparable to Portland concretes.