On shrinkage and structure changes of pure ...
Type de document :
Article dans une revue scientifique
DOI :
URL permanente :
Titre :
On shrinkage and structure changes of pure and blended Portland concretes
Auteur(s) :
Zhang, Yao [Auteur]
Davy, Catherine [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
Albert-Mercier, Cyrille [Auteur]
Henry, Natacha [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bertier, Pieter [Auteur]
Cazaux, Frederic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Damidot, Denis [Auteur]
Bourbon, Xavier [Auteur]
Davy, Catherine [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
Albert-Mercier, Cyrille [Auteur]
Henry, Natacha [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bertier, Pieter [Auteur]
Cazaux, Frederic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Damidot, Denis [Auteur]
Bourbon, Xavier [Auteur]
Titre de la revue :
Journal of the American Ceramic Society
Numéro :
100
Pagination :
4131-4152
Date de publication :
2017-04-05
Discipline(s) HAL :
Chimie/Chimie inorganique
Chimie/Matériaux
Chimie/Matériaux
Résumé en anglais : [en]
This research investigates the long-term shrinkage and Relative Mass Loss (RML) of mature Portland concretes (pure CEMI and blended CEMV/A), at temperatures of 20°C and 80°C. When placed at 80°C and at relative humidities ...
Lire la suite >This research investigates the long-term shrinkage and Relative Mass Loss (RML) of mature Portland concretes (pure CEMI and blended CEMV/A), at temperatures of 20°C and 80°C. When placed at 80°C and at relative humidities (RH) below 50-60%, concrete shrinkage increases with very slow stabilization kinetics by several hundreds of μm/m, while RML remains of about 0.2%. The origins of this continued shrinkage, simultaneously with limited RML, are investigated through the changes in (i) the pore structure of the concretes (by Mercury Intrusion Porosimetry and nitrogen adsorption) and in (ii) their solid phases (by TGA/DTA, FTIR spectroscopy coupled to DVS, quantitative X-Ray Diffraction by Rietveld analysis, and 29Si and 27Al MAS NMR). While the pore structure coarsens during continued shrinkage, several phase transformations occur, namely ettringite decomposition and changes in the silicate chain length of the C–A–S–H. While these structural changes are documented, their relationship with shrinkage/RML and to the pore structure is novel.Lire moins >
Lire la suite >This research investigates the long-term shrinkage and Relative Mass Loss (RML) of mature Portland concretes (pure CEMI and blended CEMV/A), at temperatures of 20°C and 80°C. When placed at 80°C and at relative humidities (RH) below 50-60%, concrete shrinkage increases with very slow stabilization kinetics by several hundreds of μm/m, while RML remains of about 0.2%. The origins of this continued shrinkage, simultaneously with limited RML, are investigated through the changes in (i) the pore structure of the concretes (by Mercury Intrusion Porosimetry and nitrogen adsorption) and in (ii) their solid phases (by TGA/DTA, FTIR spectroscopy coupled to DVS, quantitative X-Ray Diffraction by Rietveld analysis, and 29Si and 27Al MAS NMR). While the pore structure coarsens during continued shrinkage, several phase transformations occur, namely ettringite decomposition and changes in the silicate chain length of the C–A–S–H. While these structural changes are documented, their relationship with shrinkage/RML and to the pore structure is novel.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
INRA
Centrale Lille
Univ. Artois
Université de Lille
CNRS
INRA
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Chimie, matériaux et procédés pour un nucléaire durable (CIMEND)
Matériaux hybrides (MATHYB)
Matériaux hybrides (MATHYB)
Date de dépôt :
2019-09-25T14:06:49Z
2021-06-24T14:46:20Z
2021-06-24T14:46:20Z