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Arena metacaolínica. Material prometedor como adición al cemento Portland

Authors: Janotka, I.; Puertas, Francisca; Palacios, Magdalena; Varga, C.; Krajči, L.;

Arena metacaolínica. Material prometedor como adición al cemento Portland

Abstract

[ES] Las reservas de arena caolínica de la cantera eslovaca de Vyšný Petrovec ascienden a un total de 20 millones de toneladas. El material metacaolínico, que resulta al calentar la arena caolínica a 650 ºC, contiene entre un 31,5 y un 40% de metacaolinita, además de ilita, moscovita, cuarzo y feldespato. El objetivo de este estudio ha sido comprobar que esa arena calcinada es un material puzolánico; así como caracterizar los cementos y morteros preparados con dicha arena (MK-1). La hidratación de las mezclas se evaluó mediante calorimetría de conducción, y difracción de rayos X (DRX) y Análisis térmico-diferencial y termogravimétrico (ATD-TG). Se ha evaluado el desarrollo resistente de las mezclas y morteros; así como su estructura porosa. Los resultados obtenidos han demostrado que esa arena metacolínica (MK-1) es un material puzolánico y que podría utilizarse como adición al cemento y en la preparación de morteros.

[EN] The kaolin sand resource at the Vyšný Petrovec quarry in Slovakia comes to a total of 20 megatonnes. The metakaolin material obtained by heating kaolin sand at 650 ºC contains from 31.5 to 40% (wt) metakaolinite, as well as illite, muscovite, quartz and feldspar. The aim of this study was to verify whether this calcined sand (MK- 1) is a pozzolanic material and characterize the cements and mortars prepared with it. The hydration reactions taking place in the blends were assessed with conduction calorimetry, X-ray diffraction (XRD) and differential thermal analysis-thermogravimetry (DTA-TG). Blend and mortar strength development and pore structure were also evaluated. The results obtained showed that this metakaolin sand (MK-1) is a pozzolanic material apt for use as a cement addition and for making mortars.

Esta investigación ha sido financiada por la Slovak Academy of Sciences (SASci) y el Consejo Superior de Investigaciones Científicas (CSIC) a través del proyecto 2007SK0005 (2008-2009) y el proyecto VEGA 2/0053/10. Los autores también quieren agradecer al Ministerio de Ciencia e Innovación su financiación al proyecto BIA2007-61380. Marta Palacios agredece al CSIC la concesión del contrato postdoctoral.

15 páginas, 9 figuras, 10 tablas.

Peer reviewed

Keywords

Arena metacaolínica, Mortar, Pozzolanic activity, Cementos, Cement, Hydration, Hidratación, Actividad puzolánica, Mortero, Metakaolin sand

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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