Are calcium silicate hydrates (C-S-H) ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Are calcium silicate hydrates (C-S-H) present in alkali-activated glass cullet cement?
Auteur(s) :
Marchand, Baptiste [Auteur]
Lanier, S. [Auteur]
Davy, Catherine [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire de mécanique et matériaux du génie civil [L2MGC]
Albert-Mercier, Cyrille [Auteur]
Tricot, Grégory [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Lanier, S. [Auteur]
Davy, Catherine [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire de mécanique et matériaux du génie civil [L2MGC]
Albert-Mercier, Cyrille [Auteur]
Tricot, Grégory [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Titre de la revue :
Materials Letters
Numéro :
219
Pagination :
104-108
Éditeur :
Elsevier
Date de publication :
2018-05-15
Mot(s)-clé(s) en anglais :
Ceramics
Amorphous materials
Microstructure
X ray techniques
Electron microscopy
Nuclear magnetic resonance
Amorphous materials
Microstructure
X ray techniques
Electron microscopy
Nuclear magnetic resonance
Discipline(s) HAL :
Chimie/Matériaux
Résumé en anglais : [en]
This contribution analyzes the structure of sodium-lime-silica (SLS) glass alkali-activated with NaOH. The mix forms an alkali-activated cement (AAC), which has proven to be mechanically resistant when immerged under water. ...
Lire la suite >This contribution analyzes the structure of sodium-lime-silica (SLS) glass alkali-activated with NaOH. The mix forms an alkali-activated cement (AAC), which has proven to be mechanically resistant when immerged under water. The aim is to determine whether the presence of calcium in the glass powder may have contributed, together with alkali-activation, to forming calcium silicate hydrates (C-S-H), which are responsible for water resistance in hydrated Portland cement pastes. This is investigated by SEM, where needles similar to C-S-H in Portland paste are observed, then by X Ray Diffraction (XRD), but the pastes are too amorphous to allow any phase identification. Finally, 29Si magic angle spinning nuclear magnetic resonance (MAS NMR) shows that C-S-H are at most 2–3% in the 4 M and 8 M NaOH AAC pastes, so that they cannot be considered responsible for the water resistance of SLS glass AAC pastes and mortars. The latter are rather formed of sodium silicate hydrates and/or silica gel.Lire moins >
Lire la suite >This contribution analyzes the structure of sodium-lime-silica (SLS) glass alkali-activated with NaOH. The mix forms an alkali-activated cement (AAC), which has proven to be mechanically resistant when immerged under water. The aim is to determine whether the presence of calcium in the glass powder may have contributed, together with alkali-activation, to forming calcium silicate hydrates (C-S-H), which are responsible for water resistance in hydrated Portland cement pastes. This is investigated by SEM, where needles similar to C-S-H in Portland paste are observed, then by X Ray Diffraction (XRD), but the pastes are too amorphous to allow any phase identification. Finally, 29Si magic angle spinning nuclear magnetic resonance (MAS NMR) shows that C-S-H are at most 2–3% in the 4 M and 8 M NaOH AAC pastes, so that they cannot be considered responsible for the water resistance of SLS glass AAC pastes and mortars. The latter are rather formed of sodium silicate hydrates and/or silica gel.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Chimie, matériaux et procédés pour un nucléaire durable (CIMEND)
Propriétés magnéto structurales des matériaux (PMSM)
Propriétés magnéto structurales des matériaux (PMSM)
Date de dépôt :
2019-09-25T14:38:02Z
2021-03-15T15:14:43Z
2021-03-15T15:14:43Z