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Fibers 2018, 6(4), 87; https://doi.org/10.3390/fib6040087

Flexural Behavior of Carbon Textile-Reinforced Geopolymer Composite Thin Plate

1
Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studenstká 2, 461 17 Liberec, Czech Republic
2
Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studenstká 2, 461 17 Liberec, Czech Republic
*
Author to whom correspondence should be addressed.
Received: 28 September 2018 / Revised: 4 November 2018 / Accepted: 6 November 2018 / Published: 8 November 2018
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Abstract

Textile-reinforced Portland cement-based concrete has been researched and developed over the last few decades. It was widely used in a different range of applications, such as repair and/or strengthening of structural elements, thin walls, lightweight structures, façade elements, and others. Due to its varied application, this study aims to develop the carbon textile-reinforced geopolymer composite. Specimens of rectangular form with the dimensions of 400 × 100 × 15 mm3, reinforced with carbon textile, were produced. Four-point bending test was used to evaluate the effect of carbon textile on the mechanical strength of reinforced geopolymer composite based on the three factors: the different mortar compositions corresponding to the addition of the chopped basalt fiber (BF), the number of carbon textile layers, and the different thicknesses of the mortar cover layer. Besides that, a small part of the pull-out test was also considered to assess the adhesion strength at the interface between carbon textile and geopolymer mortar. The experimental results from the four-point bending test showed that the mechanical strength of composite specimens increased when the content of the chopped basalt fiber increased. With the increasing number of the textile layers, the specimens improved the flexural strength significantly. However, the flexural toughness of the specimens reinforced with three textile layers did not improve, as compared to those reinforced with two textile layers. The experimental results for the specimens related to the mortar cover thicknesses indicated that specimens with the mortar cover thickness of 2 mm provide the best strength. The experimental results from the pull-out tests showed that all the specimens have the same failure mode by slipping of the fiber yarn from the matrix. View Full-Text
Keywords: geopolymer; pull-out; compressive strength; flexural strength; carbon textile; chopped basalt fiber; textile-reinforced geopolymer matrix geopolymer; pull-out; compressive strength; flexural strength; carbon textile; chopped basalt fiber; textile-reinforced geopolymer matrix
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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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Le Chi, H.; Louda, P.; Periyasamy, A.P.; Bakalova, T.; Kovacic, V. Flexural Behavior of Carbon Textile-Reinforced Geopolymer Composite Thin Plate. Fibers 2018, 6, 87.

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