i.Highly Reactive Metakaolin

Highly reactive metakaolin has nowadays available as a highly active pozzolana concrete material. Contrasting slag, fly ash, or silica fume, it is not the byproduct rather manufactured from high-purity kaolin clay by calcination at temperatures in the region of 700 to 800°C. Unlike silica fume, which has above 85% SiO2, and it contains equal proportions of SiO2 and Al2O3 by mass.
