chapter  5
16 Pages

- Metakaolin

Metakaolin (MK) or the so-called high-reactivity metakaolin (HRM) is a mineral admixture, which is relatively new to the cement and concrete industry. It has the potential to improve the strength and durability of concrete. The term “high reactivity” is used to distinguish a whitish, puried, manufactured, thermally activated kaolinite (a constituent of kaolin clay) or MK from the less reactive varieties of calcined clay pozzolan containing impurities, which cannot be activated to a pozzolanic form at the temperature used to produce MK.