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Fibers 2015, 3(4), 491-503; doi:10.3390/fib3040491

Experimental Analysis of Repaired Masonry Elements with Flax-FRCM and PBO-FRCM Composites Subjected to Axial Bending Loads

1
Facultad de Ingeniería Civil, Universidad Nacional de Chimborazo, Riobamba 060150, Ecuador
2
Department of Civil Engineering, University of Calabria, Rende 87036, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Luciano Ombres
Received: 21 September 2015 / Accepted: 2 November 2015 / Published: 6 November 2015
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Abstract

In the construction industry, the use of natural fabrics as a reinforcement for cement-based composites has shown great potential. The use of these sustainable composites to provide strengthening or repair old masonry structures that exhibit structural problems mainly due to a poor tensile strength of the mortar/brick joints is revealed to be a promising area of research. One of the most significant load conditions affecting the mechanical response of masonry structures occurs when axial bending loads are applied on the resistant cross-section. In this study, three different types of masonry elements were built using clay bricks and a lime-based mortar. After 28 days, the samples were subjected to concentric and eccentric compressive loads. In order to produce significant bending effects, the compressive loads were applied with large eccentricity, and a sudden failure characterized the behavior of the unreinforced masonry (URM) elements. The tested masonry specimens were repaired using fabric-reinforced cementitious matrix (FRCM) composites produced using bi-directional flax and polyparaphenylene benzobisoxazole (PBO) fabrics. The mechanical behavior of the URM and repaired samples was compared in terms of load-displacement and moment-curvature responses. Furthermore, the results achieved using flax-FRCM composites were compared with those of using PBO-FRCM composites. View Full-Text
Keywords: fiber reinforced cementitious matrix (FRCM); mechanical properties; masonry structures; natural fiber fiber reinforced cementitious matrix (FRCM); mechanical properties; masonry structures; natural fiber
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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MDPI and ACS Style

Cevallos, O.A.; Olivito, R.; Codispoti, R. Experimental Analysis of Repaired Masonry Elements with Flax-FRCM and PBO-FRCM Composites Subjected to Axial Bending Loads. Fibers 2015, 3, 491-503.

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