TEM and SAED Characterization of Metakaolin. Pozzolanic Activity

Trusilewicz, Lidia Natalia; Fernandez Martinez, F.; Rahhal, V. y 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.


Título: TEM and SAED Characterization of Metakaolin. Pozzolanic Activity
  • Trusilewicz, Lidia Natalia
  • Fernandez Martinez, F.
  • Rahhal, V.
  • Talero Morales, Rafael
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of the American Ceramic Society
Fecha: Julio 2012
Volumen: 95
Escuela: E.U.I.T. Industrial (UPM) [antigua denominación]
Departamento: Química Industrial y Polímeros [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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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.

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ID de Registro: 13922
Identificador DC: http://oa.upm.es/13922/
Identificador OAI: oai:oa.upm.es:13922
Identificador DOI: 10.1111/j.1551-2916.2012.05325.x
URL Oficial: http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2012.05325.x/abstract
Depositado por: Memoria Investigacion
Depositado el: 21 Dic 2012 11:59
Ultima Modificación: 21 Abr 2016 13:21
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