A type II of pozzolanic addition to concretes and mortars.
Metakaolin is a material shaped from a natural raw-material Kaolin by calcination at above 500°C. It is a transition metastable phase.
On the contrary to the mineral kaolin, the Metakaolin shows a very little expressive crystal structure similar to Kaolin – it has more or less amorphous character. At the same time a partial consolidation caused by dehydration of the original material shows up.
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