Durability of inorganic foam in solution: The role of alkali elements in the geopolymer network

Stéphanie Delair (1, 2, 3) , Elodie Prud'Homme (4) , Claire Peyratout (4) , Agnès Smith (4) , Philippe Michaud (5, 6, 7, 8) , Lilian Eloy (9) , Emmanuel Joussein (10) , S. Rossignol (11)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 P2MC-ENSMSE - Département Poudres et Matériaux Multi-Composants
3 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
4 GEMH - Groupe d'Etudes des Matériaux Hétérogènes
5 UNILIM - Université de Limoges
6 IPAM - Institut des Procédés Appliqués aux Matériaux
7 IRCER - Institut de Recherche sur les CERamiques
8 IRCER-AXE1 - IRCER - Axe 1 : procédés céramiques
9 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]
10 GRESE - Groupement de Recherche Eau, Sol, Environnement
11 SPCTS-AXE3 - Axe 3 : organisation structurale multiéchelle des matériaux

The characterization of the behavior of inorganic foams in aqueous media is defined as a function of various parameters (initial pH value of the solution, alkaline element and aging of the foam). The final products and their microstructure depend on the alkaline cation in relation with the hydration shell. Durability tests revealed that the geopolymer foam network is based on three compounds: a dense geopolymer depending on the alkaline element, amorphous silica and M 2Si 2O 5. For potassium foam, a fourth component was also evidenced: a zeolite that is partly responsible for the degradation of this foam.

Mots clés: Basic species; Geopolymer; Inorganic foam; K 2Si 2O 5; Stability in solution; Zeolite

Domaines: Matériaux

Stéphanie Delair, Elodie Prud'Homme, Claire Peyratout, Agnès Smith, Philippe Michaud, et al.. Durability of inorganic foam in solution: The role of alkali elements in the geopolymer network. Corrosion Science, 2012, 59, pp.213. ⟨10.1016/j.corsci.2012.03.002⟩. ⟨hal-01045245⟩