Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior
Pure model geopolymers present a promising potential for high-temperature binders for structural or coating applications. However, their well-known chemical stability, which can reach 1400 °C in the case of K-activated geopolymer, is accompanied by deleterious dimensional behavior, with significant...
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doaj-b4d9628ad8574e11bdfedd083563ff742021-04-24T05:58:47ZengElsevierOpen Ceramics2666-53952021-03-015100081Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behaviorSandrine Gomes0Lawrence Frezet1Elodie Petit2Svetlana Petlickaia3Sylvie Rossignol4Nathalie Texier-Mandoki5Guillaume Renaudin6Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, F-63000, Clermont-Ferrand, FranceUniversité Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, F-63000, Clermont-Ferrand, FranceUniversité Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, F-63000, Clermont-Ferrand, FranceIRCER, Université de Limoges UMR3571, 12 rue Atlantis, 87068, Limoges, FranceIRCER, Université de Limoges UMR3571, 12 rue Atlantis, 87068, Limoges, FranceAgence nationale pour la gestion des déchets radioactifs (Andra), 1/7 rue Jean Monnet, 92298, Châtenay-Malabry, Cedex, FranceUniversité Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, F-63000, Clermont-Ferrand, France; Corresponding author.Pure model geopolymers present a promising potential for high-temperature binders for structural or coating applications. However, their well-known chemical stability, which can reach 1400 °C in the case of K-activated geopolymer, is accompanied by deleterious dimensional behavior, with significant shrinkage on heating. The work in the present paper focuses on the impact of tailored calcined argillite added to geomaterial formulations for fireproofing applications. Calcined argillite acts both as a filler and a reagent, with a supplementary delayed reaction activated by humidity and heat. K-activation of a mix of one-third metakaolin with two-thirds calcined argillite enables the shrinkage rate to be limited, and is accompanied by improved self-healing during viscous creep (allowing to preserve mechanical resistance at high temperature). This composite formulation preserves chemical stability, improves physical behavior, and maintains interesting mesoporosity for hydric properties. These different aspects are beneficial for a high temperature application.http://www.sciencedirect.com/science/article/pii/S2666539521000274GeopolymersFillerArgilliteCharacterizationThermal treatment |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sandrine Gomes Lawrence Frezet Elodie Petit Svetlana Petlickaia Sylvie Rossignol Nathalie Texier-Mandoki Guillaume Renaudin |
spellingShingle |
Sandrine Gomes Lawrence Frezet Elodie Petit Svetlana Petlickaia Sylvie Rossignol Nathalie Texier-Mandoki Guillaume Renaudin Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior Open Ceramics Geopolymers Filler Argillite Characterization Thermal treatment |
author_facet |
Sandrine Gomes Lawrence Frezet Elodie Petit Svetlana Petlickaia Sylvie Rossignol Nathalie Texier-Mandoki Guillaume Renaudin |
author_sort |
Sandrine Gomes |
title |
Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior |
title_short |
Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior |
title_full |
Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior |
title_fullStr |
Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior |
title_full_unstemmed |
Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior |
title_sort |
temperature stability of an argillite/k-geopolymer composite: impact of argillite filler on dimensional behavior |
publisher |
Elsevier |
series |
Open Ceramics |
issn |
2666-5395 |
publishDate |
2021-03-01 |
description |
Pure model geopolymers present a promising potential for high-temperature binders for structural or coating applications. However, their well-known chemical stability, which can reach 1400 °C in the case of K-activated geopolymer, is accompanied by deleterious dimensional behavior, with significant shrinkage on heating. The work in the present paper focuses on the impact of tailored calcined argillite added to geomaterial formulations for fireproofing applications. Calcined argillite acts both as a filler and a reagent, with a supplementary delayed reaction activated by humidity and heat. K-activation of a mix of one-third metakaolin with two-thirds calcined argillite enables the shrinkage rate to be limited, and is accompanied by improved self-healing during viscous creep (allowing to preserve mechanical resistance at high temperature). This composite formulation preserves chemical stability, improves physical behavior, and maintains interesting mesoporosity for hydric properties. These different aspects are beneficial for a high temperature application. |
topic |
Geopolymers Filler Argillite Characterization Thermal treatment |
url |
http://www.sciencedirect.com/science/article/pii/S2666539521000274 |
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