Abstract

Production of metakaolin to increase the properties of cement and mortar has been studied from ordinary multicomponent mineral clays and
shales as cheap raw materials. Alluvium clay shales formed as a result of mudflows were used as starting material and the optimal mode of
its heat treatment has been elaborated to obtain the maximal amount of metakaolin. The pozzolanic properties of the heat-treated clay shales
were monitored with making and testing various types of cement.

Key words: metakaolin; portland cement; shales; pozzolanic admixture; heat treatment