Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior

Abstract : 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.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-03167962
Contributeur : Beatrice Derory <>
Soumis le : vendredi 12 mars 2021 - 15:37:49
Dernière modification le : mercredi 21 avril 2021 - 03:02:20

Lien texte intégral

Identifiants

Citation

Sandrine Gomes, Lawrence Frezet, Elodie Petit, Svetlana Petlickaia, Sylvie Rossignol, et al.. Temperature stability of an argillite/K-geopolymer composite: Impact of argillite filler on dimensional behavior. Open Ceramics, Elsevier, 2021, 5, pp.100081. ⟨10.1016/j.oceram.2021.100081⟩. ⟨hal-03167962⟩

Partager

Métriques

Consultations de la notice

64