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Metakaolin-Based Geopolymer with Added TiO2 Particles: Physicomechanical Characteristics

Composites Materials Group (CENM), School of Materials Engineering Universidad del Valle, Cali 76001, Colombia
Department of Civil and Industrial Engineering, Pontificia Universidad Javeriana, Cali 760031, Colombia
Author to whom correspondence should be addressed.
Academic Editor: Silvia Gross
Coatings 2017, 7(12), 233;
Received: 26 October 2017 / Revised: 2 December 2017 / Accepted: 12 December 2017 / Published: 15 December 2017
(This article belongs to the Special Issue Nanocoatings with Air-Purifying Properties)
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The effect of the TiO2 addition on the physicomechanical properties of a geopolymer system based on metakaolin (MK) and hydroxide and potassium silicate as activators is presented in this article. Three different liquid-solid systems (0.35, 0.40, and 0.45) and two titanium additions were investigated (5% and 10% of the cement content). The flowability, setting time, and mechanical strength of the geopolymer mixtures and their microstructural characteristics were evaluated using techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). It was concluded that a percentage of up to 10% TiO2 does not affect the mechanical properties of the geopolymer, although it does reduce the fluidity and setting times of the mixture. View Full-Text
Keywords: geopolymer; metakaolin; titanium oxide; physical and mechanical properties geopolymer; metakaolin; titanium oxide; physical and mechanical properties

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Guzmán-Aponte, L.A.; Mejía de Gutiérrez, R.; Maury-Ramírez, A. Metakaolin-Based Geopolymer with Added TiO2 Particles: Physicomechanical Characteristics. Coatings 2017, 7, 233.

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