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Microstructural changes induced in Portland cement-based materials due to natural and supercritical carbonation

Supercritical carbonation of Portland cement binders was studied to analyse the influence of the type of cement on carbonation at high CO 2 pressures (CO 2 at 20 MPa and 318 K) and to improve the understanding of the effects on the microstructure and physicochemical properties of binders. The result... Full description

Journal Title: Journal of materials science 2008, Vol.43 (9), p.3101-3111
Main Author: Hidalgo, Ana
Other Authors: Domingo, Concha , Garcia, Carlos , Petit, Sabine , Andrade, Carmen , Alonso, Cruz
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: New York: Springer US
ID: ISSN: 0022-2461
Link: http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20270844
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recordid: cdi_proquest_miscellaneous_32428353
title: Microstructural changes induced in Portland cement-based materials due to natural and supercritical carbonation
format: Article
creator:
  • Hidalgo, Ana
  • Domingo, Concha
  • Garcia, Carlos
  • Petit, Sabine
  • Andrade, Carmen
  • Alonso, Cruz
subjects:
  • Applied sciences
  • Article
  • Binders
  • Buildings. Public works
  • Calcium carbonate
  • Carbon dioxide
  • Carbonation
  • Cement
  • Cement concrete constituents
  • Cements
  • Characterization and Evaluation of Materials
  • Chemistry and Materials Science
  • Classical Mechanics
  • Crystallization
  • Crystallography and Scattering Methods
  • Differential thermal analysis
  • Exact sciences and technology
  • general
  • Materials
  • Materials Science
  • Mathematical analysis
  • Microstructure
  • Polymer Sciences
  • Portland cements
  • Properties and test methods
  • Properties of anhydrous and hydrated cement, test methods
  • Solid Mechanics
ispartof: Journal of materials science, 2008, Vol.43 (9), p.3101-3111
description: Supercritical carbonation of Portland cement binders was studied to analyse the influence of the type of cement on carbonation at high CO 2 pressures (CO 2 at 20 MPa and 318 K) and to improve the understanding of the effects on the microstructure and physicochemical properties of binders. The results were compared with those obtained in a natural exposure. Microstructural properties of supercritically and atmospherically carbonated Portland cement binders were examined using the complementary analytical techniques of FTIR, TG-DTA, and BSEM-EDX. Supercritically carbonated binders showed a microstructure based on a more polymerized and lower Ca form of CSH gel, formed by decalcification of high-Ca form of CSH gel. Results suggested that during the treatment at artificially intensified conditions, the crystallized calcium carbonate came mainly from the carbonation of the CSH gel, and at atmospheric conditions, from the carbonation of the portlandite phase.
language: eng
source:
identifier: ISSN: 0022-2461
fulltext: no_fulltext
issn:
  • 0022-2461
  • 1573-4803
url: Link


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titleMicrostructural changes induced in Portland cement-based materials due to natural and supercritical carbonation
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descriptionSupercritical carbonation of Portland cement binders was studied to analyse the influence of the type of cement on carbonation at high CO 2 pressures (CO 2 at 20 MPa and 318 K) and to improve the understanding of the effects on the microstructure and physicochemical properties of binders. The results were compared with those obtained in a natural exposure. Microstructural properties of supercritically and atmospherically carbonated Portland cement binders were examined using the complementary analytical techniques of FTIR, TG-DTA, and BSEM-EDX. Supercritically carbonated binders showed a microstructure based on a more polymerized and lower Ca form of CSH gel, formed by decalcification of high-Ca form of CSH gel. Results suggested that during the treatment at artificially intensified conditions, the crystallized calcium carbonate came mainly from the carbonation of the CSH gel, and at atmospheric conditions, from the carbonation of the portlandite phase.
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subjectApplied sciences ; Article ; Binders ; Buildings. Public works ; Calcium carbonate ; Carbon dioxide ; Carbonation ; Cement ; Cement concrete constituents ; Cements ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Classical Mechanics ; Crystallization ; Crystallography and Scattering Methods ; Differential thermal analysis ; Exact sciences and technology ; general ; Materials ; Materials Science ; Mathematical analysis ; Microstructure ; Polymer Sciences ; Portland cements ; Properties and test methods ; Properties of anhydrous and hydrated cement, test methods ; Solid Mechanics
ispartofJournal of materials science, 2008, Vol.43 (9), p.3101-3111
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descriptionSupercritical carbonation of Portland cement binders was studied to analyse the influence of the type of cement on carbonation at high CO 2 pressures (CO 2 at 20 MPa and 318 K) and to improve the understanding of the effects on the microstructure and physicochemical properties of binders. The results were compared with those obtained in a natural exposure. Microstructural properties of supercritically and atmospherically carbonated Portland cement binders were examined using the complementary analytical techniques of FTIR, TG-DTA, and BSEM-EDX. Supercritically carbonated binders showed a microstructure based on a more polymerized and lower Ca form of CSH gel, formed by decalcification of high-Ca form of CSH gel. Results suggested that during the treatment at artificially intensified conditions, the crystallized calcium carbonate came mainly from the carbonation of the CSH gel, and at atmospheric conditions, from the carbonation of the portlandite phase.
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abstractSupercritical carbonation of Portland cement binders was studied to analyse the influence of the type of cement on carbonation at high CO 2 pressures (CO 2 at 20 MPa and 318 K) and to improve the understanding of the effects on the microstructure and physicochemical properties of binders. The results were compared with those obtained in a natural exposure. Microstructural properties of supercritically and atmospherically carbonated Portland cement binders were examined using the complementary analytical techniques of FTIR, TG-DTA, and BSEM-EDX. Supercritically carbonated binders showed a microstructure based on a more polymerized and lower Ca form of CSH gel, formed by decalcification of high-Ca form of CSH gel. Results suggested that during the treatment at artificially intensified conditions, the crystallized calcium carbonate came mainly from the carbonation of the CSH gel, and at atmospheric conditions, from the carbonation of the portlandite phase.
copNew York
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doi10.1007/s10853-008-2521-5