Evidence of a gel in geopolymer compounds from pure metakaolin

Alexandre Autef; Elodie Prud'Homme; Emmanuel Joussein; G. Gasgnier; Stéphane Pronier; Sylvie Rossignol

Evidence of a gel in geopolymer compounds from pure metakaolin

Alexandre Autef ¹ Elodie Prud'Homme ¹ Emmanuel Joussein ² G. Gasgnier ³ Stéphane Pronier ⁴ Sylvie Rossignol ^{5, *}

* Auteur correspondant

1 GEMH - Groupe d'Etudes des Matériaux Hétérogènes

2 GRESE - Groupement de Recherche Eau, Sol, Environnement

3 IMERYS - IMERYS TABLEWARE FRANCE

4 IC2MP - Institut de Chimie des Milieux et Matériaux de Poitiers

5 SPCTS-AXE3 - Axe 3 : organisation structurale multiéchelle des matériaux

SPCTS - Science des Procédés Céramiques et de Traitements de Surface

Abstract : During the synthesis of geopolymer materials, all of the phenomena and reactions that occur should be included in the analysis of the synthesis. This work aims to study the role that siliceous species play in an activation solution in the presence of pure metakaolin. The formation of a gel phase during the synthesis of a K-geopolymer was shown. Different mixtures were analyzed by infrared spectroscopy. During material consolidation, there is always competition between the geopolymer network and the gel that is governed by a change in the siliceous species. The heat treatment of various gels and solids provided evidence of various networks in geopolymer materials. Finally, the change in the crystallinity of the silica in the activation solution led to a change in the kinetics of the polycondensation reactions, in agreement with previous work. © 2013 Springer Science+Business Media New York.

keyword : Alkaline silicate solution Gel Geopolymer IR spectroscopy Metakaolin TEM

Type de document :

Article dans une revue

Domaine :

Chimie / Matériaux

Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-01044610
Contributeur : Sylvie Rossignol <>
Soumis le : mercredi 23 juillet 2014 - 17:54:43
Dernière modification le : jeudi 7 février 2019 - 14:28:05

Evidence of a gel in geopolymer compounds from pure metakaolin

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Evidence of a gel in geopolymer compounds from pure metakaolin

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