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Investigations on Na-Silicate Based Binders

Published online by Cambridge University Press:  21 February 2011

Ivan Odler
Affiliation:
Technical University Clausthal, Institute of Nonmetallic Materials, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany
U. Hennicke
Affiliation:
Technical University Clausthal, Institute of Nonmetallic Materials, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany
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Abstract

Water glass Na2O-SiO2 reacts in water solutions with Na2SiF6, yielding an amorphous SiO2 and NaF. This reaction, that is completed within a few days, causes setting and hardening of the system. Mortars made with this binder using appropriate fillers sustain temperatures of up to 900°C. At temperatures above 500°C, the hardened material converts gradually to tridymite quartz and sodium disilicate. Above 900°C, a sodium fluosilicate glass melt starts to be formed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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