English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/79702
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Changes on the nanostructure of cementitius calcium silicate hydrates (C–S–H) induced by aqueous carbonation

AuthorsMorales-Flórez, Víctor ; Findling, N.; Brunet, F.
Issue Date2012
PublisherSpringer
CitationJournal of Materials Science 47: 764–771(2012)
AbstractThe nanostructure of the main binding phase of the hydrated cements, the calcium silicate hydrates (C–S–H), and their structural changes due to aqueous carbonation have been characterized using TEM, nitrogen physisorption, and SAXS. Synthetic C–S–H has been used for this purpose. Two different morphologies were identified, similar to the high density and low density C–S–H types. When submitting the sample to a CO2 flux, the low density phase was completely carbonated. The carbonation by-products, calcium carbonate, and silica gel were also identified and characterized. The precipitation of the silica gel increased the specific surface area from 95 to 132 m2/g, and its structure, formed by particles of ~5 nm typical radius, was observed by small angle X-ray scattering. In addition, the resistance of the high density C–S–H to carbonation is reported, and the passivating effect of the precipitated calcium carbonate is also discussed. Finally, the results have been compared with carbonation features observed in Portland cement carbonated experimentally at downhole conditions.
Description8 páginas; 8 figuras; 3 tablas
Publisher version (URL)http://dx.doi.org/10.1007/s10853-011-5852-6
URIhttp://hdl.handle.net/10261/79702
DOI10.1007/s10853-011-5852-6
ISSN0022-2461
Appears in Collections:(ICMS) Artículos
Files in This Item:
File Description SizeFormat 
JMS (2012) 47 764–771.docx268,96 kBMicrosoft Word XMLView/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.