Resistivity Measurements to Study the Early Chemical and Autogenous Shrinkage of a Binary Alkali-activated Slag-metakaolin System

Abstract Alkali-activated slag-metakaolin (AASM) has a lower shrinkage than alkali-activated slag, but its complex behaviour remains elusive. In this paper, resistivity measurements were used to monitor the early chemical and autogenous evolution of AASM (containing 10%, 30%, 50%, or 70% metakaolin). The MK content greatly affected development AASM, specimens with 50% showed lowest 49%. presence delayed formation calcium aluminosilicate hydrate (C-A-S-H) gels (the activation products slag), thus mitigating shrinkage. A functional relationship between was established, which that can be evaluate predict AASM.