TEM and SAED Characterization of Metakaolin. Pozzolanic Activity

Trusilewicz, Lidia Natalia, Fernandez Martinez, F., Rahhal, V. and Talero Morales, Rafael (2012). TEM and SAED Characterization of Metakaolin. Pozzolanic Activity. "Journal of the American Ceramic Society", v. 95 (n. 9); pp. 2989-2996. ISSN 0002-7820. https://doi.org/10.1111/j.1551-2916.2012.05325.x.


Title: TEM and SAED Characterization of Metakaolin. Pozzolanic Activity
  • Trusilewicz, Lidia Natalia
  • Fernandez Martinez, F.
  • Rahhal, V.
  • Talero Morales, Rafael
Item Type: Article
Título de Revista/Publicación: Journal of the American Ceramic Society
Date: July 2012
ISSN: 0002-7820
Volume: 95
Faculty: E.U.I.T. Industrial (UPM)
Department: Química Industrial y Polímeros [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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The present study deals with a characterization of metakaolin pozzolanic activity and its chemical character exhibited in the Ordinary Portland Cement (OPC) blends by means of Transmission Electron Microscopy (TEM) and Selected-Area Electron Diffraction (SAED) techniques principally. Metakaolin sample was prepared by calcination of kaolin rock (Guadalajara, Spain) at 780°C. Two OPC of different chemical composition from the tricalcium aluminate content point of view were chosen and Portland cement blends series elaborated and then submitted to the pozzolanic activity test (EN 196-5 or Frattini test). The main mineralogical components of the metakaolin are determined qualitatively: χ-alumina and quartz. The chemical character of the metakaolin is described because of its final composition as well as due to its Al atoms possible coordination. The crystalline order of the material is found to be of both amorphous and polycrystalline, being an intimate amorphous mixture of alumina and silica. Finally, all the alumina capable of reacting chemically is denominated and classified as reactive alumina component, Al2O3r−, of pozzolans, as well as the aluminic chemical character of metakaolin in OPC blends is once again proved and exhibited by means of Friedel's salt formation studied already at 4 h-age.

More information

Item ID: 13922
DC Identifier: https://oa.upm.es/13922/
OAI Identifier: oai:oa.upm.es:13922
DOI: 10.1111/j.1551-2916.2012.05325.x
Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1551-...
Deposited by: Memoria Investigacion
Deposited on: 21 Dec 2012 11:59
Last Modified: 21 Apr 2016 13:21
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