Metakaolin as an Extender in South African Cement
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 4
Abstract
Metakaolin is a pozzolanic material obtained through thermal activation of kaolinite. It has several important advantages when used as an extender for Portland cement. This note describes the strength enhancement observed in mortars containing metakaolin additions between 10 and 30%. It was found that compressive strengths increase with increased curing times and depended strongly on the activation temperature used. Strength enhancements did not depend significantly on the concentration of metakaolin addition. Significant improvements in compressive strengths of cement mortars, up to 80% or more, was found in selected cases.
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Acknowledgments
Serina Kaolin is gratefully acknowledged for supplying the material used in this investigation. The writers also thank the National Research Foundation (NRF) for supplying financial assistance.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 4 • August 2006
Pages: 619 - 623
Copyright
© 2006 ASCE.
History
Received: Mar 30, 2004
Accepted: Aug 30, 2004
Published online: Aug 1, 2006
Published in print: Aug 2006
Notes
Note. Associate Editor: Chiara F. Ferraris
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