Effect of Metakaolin on the Durability of Geopolymers

The incorporation of metakaolin (MK) as a part of the precursor may have a positive or a negative effect on the durability of geopolymers. The findings on the effect of MK on carbonation depth and fire resistance are inconclusive. The incorporation of a suitable ratio of MK into geopolymers has a positive effect on surface resistance, sulphate resistance, acid resistance, rapid chloride permeability, alkali–silica reaction expansion and chloride binding capacity. The main aim of this chapter is to present an all-encompassing review, summary, and analysis of previous studies that have examined the effect of MK on different durability aspects of different types of geopolymers.