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Título : SEM/EDX Characterization of the Hydration Products of Belite Cements from Class C Coal Fly Ash
Autor : Goñi Elizalde, Sara; Guerrero Bustos, Ana María
Palabras clave : Hydration products
Belite cement
Class C-coal-fly ash
Scanning Electron Microscopy (SEM)
Energy-Dispersive X-ray (EDX) microanalysis
X-ray Diffraction (XRD) analysis
Fecha de publicación : 2007
Editor: American Ceramic Society
John Wiley & Sons
Citación : J. Am. Ceram. Soc., 90 [12] 3915–3922 (2007)
Resumen: This paper presents the microscopic characterization of two types of fly ash belite cements and their hydration products by means of scanning electron microscopy, energy-dispersive X-ray microanalysis, and X-ray diffraction analysis. The cements were obtained from ASTM class C coal fly ash by the hydrothermal–calcination route in water (FABC-2-W) and NaOH 1Msolution (FABC-2-N). The hydration was studied during a period of 180 days at 211C and 495% RH. The results showed significant incorporation of aluminum (Al) into the C–S–H gel and other minor elements, with a presumable position close to that of aluminum-tobermorite. The C–S–H composition of the FABC-2-W is more stable over the hydration time than that of the FABC-2-N cement. Portlandite is scarcely formed during hydration.
Descripción : 8 pages.-- Final full-text version of the paper available at: http://dx.doi.org/10.1111/j.1551-2916.2007.01996.x.
URI : http://hdl.handle.net/10261/4948
DOI: 10.1111/j.1551-2916.2007.01996.x
ISSN: 0002-7820
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