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Materials 2013, 6(7), 2989-3006; doi:10.3390/ma6072989
Article

Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars

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Department of Engineering, University of Naples 'Parthenope', INSTM Research Group Naples Parthenope, Centro Direzionale Naples, Isola C4, 80143 Naples, Italy
* Author to whom correspondence should be addressed.
Received: 21 June 2013 / Revised: 29 June 2013 / Accepted: 9 July 2013 / Published: 17 July 2013
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Abstract

The preparation and characterization of metakaolin-based geopolymer mortars containing an organic epoxy resin are presented here for the first time. The specimens have been prepared by means of an innovative in situ co-reticulation process, in mild conditions, of commercial epoxy based organic resins and geopolymeric slurry. In this way, geopolymer based hybrid mortars characterized by a different content of normalized sand (up to 66% in weight) and by a homogeneous dispersion of the organic resin have been obtained. Once hardened, these new materials show improved compressive strength and toughness in respect to both the neat geopolymer and the hybrid pastes since the organic polymer provides a more cohesive microstructure, with a reduced amount of microcracks. The microstructural characterization allows to point out the presence of an Interfacial Transition Zone similar to that observed in cement based mortars and concretes. A correlation between microstructural features and mechanical properties has been studied too.
Keywords: geopolymer mortar; epoxy resin; hybrid composites; metakaolin; interfacial transition zone geopolymer mortar; epoxy resin; hybrid composites; metakaolin; interfacial transition zone
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.

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MDPI and ACS Style

Colangelo, F.; Roviello, G.; Ricciotti, L.; Ferone, C.; Cioffi, R. Preparation and Characterization of New Geopolymer-Epoxy Resin Hybrid Mortars. Materials 2013, 6, 2989-3006.

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