Abstract
Recent earthquakes have highlighted the vulnerability of existing buildings, generally realised without any measures against the effects of seismic actions. The need for maintenance and rehabilitation of historical centres and the preservation of the original architectural characters of building are among the major challenges in civil and structural engineering. Textile Reinforced Mortar (TRM) composite systems represent one of the most recent and promising solutions for strengthening and retrofitting masonry buildings. The present work aims at investigating the mechanical behaviour of a sustainable composite made by a natural hydraulic lime mortar (NHL) reinforced with flax fabrics tested in tension, with focus on the crack propagation pattern and on the assessment of the textile-to-matrix bond stress. The assessment of the bond stress at the interface between the reinforcing element and the surrounding lime mortar is carried out through a model capable to predict spacing based on bond-slip law. The result underlines that by increasing the reinforcement volume fraction no significant reduction in terms of tensile strength is observed. The experimental evidence is also confirmed by the analysis of the bond stress conducted by investigating the crack pattern.
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Acknowledgements
The first Author’s Ph.D. scholarship is granted by the Italian Ministry for Education, University and Research (MIUR) as part of the program “Dottorati Innovativi a caratterizzazione industriale” funded by the European Union (Structural Funding ERDF-ESF for “Research and Innovation” 2014-2020), whose financial support is gratefully acknowledged. Moreover, the Authors gratefully acknowledge INNOVATIONS s.r.l. for providing the tested materials.
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Ferrara, G., Caggegi, C., Gabor, A., Martinelli, E. (2020). Flax Textile Reinforced Mortars: Experimental Characterization and Structural Behavior. In: Monteiro, J., et al. INCREaSE 2019. INCREaSE 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-30938-1_69
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DOI: https://doi.org/10.1007/978-3-030-30938-1_69
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