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On Possibility of Regulating Parameters of Metakaolin Synthesis Using Clay Rocks of Georgia

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Abstract:

Metakaolin is in great demand worldwide as a highly active pozzolanic additive to Portland cement. The use of metakaolin helps to increase the density, water resistance, and mechanical strength of Portland cement, which makes it possible to reduce the consumption of clinker – the most energy-intensive and expensive component of cement/concrete. Usually, metakaolin is obtained by thermal processing of kaolin clays at a temperature of 600–850°C. Kaolin clay reserves in the world are strictly limited. Kaolin clays have not been identified in Georgia. However, there are kaolinized clays, which are distinguished by a lower Al2O3 content compared to kaolin clays. The purpose of this work is to study the possibility of obtaining a highly active pozzolanic additive – metakaolin based on kaolinized clays of Georgia and regulation of the parameters of their synthesis. It is proved that the addition of fly ash to kaolinized clay allows reducing the temperature of heat treatment and obtaining a highly effective pozzolanic additive to cement.

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Periodical:

Key Engineering Materials (Volume 1027)

Pages:

123-129

DOI:

https://doi.org/10.4028/p-tSV9tC

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Online since:

October 2025

Authors:

Elena Shapakidze*, Tamar Petriashvili, Isolda Kamushadze, Lamara Gabunia, Ioseb Gejadze, Evgeni Khuchua

Keywords:

Fly Ash, Kaolinized Clay, Metakaolin, Pozzolanic Additive

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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