Metakaolin is a synthetic pozzolan commonly used in the field of civil engineering. The
metakaolin is the result of calcining kaolinite. It is economically advantageous to use metakaolin
in substitution of part of the cement. This work concerns a bibliographic research on the thermal
behavior of kaolinite, notably dehydration and dehydroxylation. The literature is full of studies to
draw the great benefits that provides this substitution. This material was the subject of much
research is a European standard NF P 18 513.
The pozzolanic activity can be determined by quantifying hydroxide Calcium consumed by
metakaolins. In this work we describe in general the different methods of assessing the
pouzolanicité.