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Thermal properties of alkali‐activated aluminosilicate composite with lightweight aggregates at elevated temperatures
Author(s) -
Zuda Lucie,
Rovnaník Pavel,
Bayer Patrik,
Černý Robert
Publication year - 2010
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.1049
Subject(s) - thermal diffusivity , aluminosilicate , materials science , thermal expansion , composite material , atmospheric temperature range , composite number , vermiculite , heat capacity , alkali metal , thermal , aggregate (composite) , thermodynamics , chemistry , organic chemistry , physics , catalysis
Thermal diffusivity, specific heat capacity and linear thermal expansion coefficient of a lightweight composite with alkali‐activated aluminosilicate binder and heat‐resistant aggregate mixture of expanded vermiculite and electrical porcelain are measured in a wide temperature range. Experimental results show that the studied material has good prerequisites for high‐temperature applications. The apparent thermal diffusivity at one‐sided heating is significantly lower than at room temperature, and decreases for temperatures higher than 400 ∘ C. The effective specific heat capacity at elevated temperatures increases with temperature in almost the whole analyzed temperature range. The linear thermal expansion coefficient is substantially lower compared with common cement‐based composites. Copyright © 2010 John Wiley & Sons, Ltd.