Metakaolin
differs from other supplementary cementitious
materials
like fly ash, slag
or silica fume, in that it is a not a by-product
of an industrial process; it is manufactured
for specific purpose under controlled conditions.
Metakaolin is produced by heating kaolin,
a natural clay that is in abundance in middle-Georgia,
to temperatures between 1200-1750°F (650-900°C).
This treatment, called calcination, radically
modifies the particle structure making it
a highly reactive, amorphous pozzolan.
