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Temperature stability of a pure metakaolin based K‐geopolymer: Part 2. Variations in the mesoporous network and its rehydration stability
Author(s) -
Gomes Sandrine,
Petit Elodie,
Frezet Lawrence,
Nedelec JeanMarie,
Gharzouni Ameni,
Rossignol Sylvie,
Renaudin Guillaume
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17127
Subject(s) - geopolymer , metakaolin , mesoporous material , materials science , amorphous solid , porosity , thermal stability , composite material , stability (learning theory) , chemical engineering , computer science , chemistry , crystallography , compressive strength , engineering , biochemistry , machine learning , catalysis
The thermal behavior of a model MK‐based K‐geopolymer was investigated between room temperature and 1400°C in order to evaluate its potentiality for high‐temperature applications. The purpose of our study was to monitor the behavior of a geopolymer during a temperature rise in order to better understand its variations with respect to temperature. The works from the present paper focus only changes in the porous network; it follows a first part devoted to variations in the mineral matrix. The results obtained here show that the geopolymer material preserves its porous integrity up to 800°C, while maintaining the reversibility of water exchanges corresponding to about 25 weight percent. Together with the results of part 1, the findings of this study allow us to affirm that geopolymer materials are only very little affected by temperatures up to 800°C, or even 900°C (keeping its mesoporous amorphous structure).