Abstract
The structural effectiveness of textile reinforced mortar (TRM) composites relies on their load transfer capacity to the substrate and the interaction between textile and mortar. The bond plays a crucial role in mechanism of TRM composites. Despite some recent investigations, a deep understanding still needs to be gained on the textile-to-mortar bond to develop suitable analytical and numerical predictive models, improve test methods, and orient design criteria. This work describes a laboratory study in which pull-out tests were carried out to investigate the effect of the slip rate and cyclic loading on the textile-to-mortar bond behaviour. Alkali-resistant glass fabric and sgalvanised ultra-high tensile strength steel cords embedded in two different lime-based mortars were tested. The pull-out response was sensitive to the strain rate at low rates. Cyclic loading produced a strength degradation, which reduced with the number of cycles.
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Acknowledgements
Kerakoll SpA (Sassuolo, MO, Italy) is kindly acknowledged for supplying reinforcement materials. Additionally, the authors wish also to thank Andrea Della Torre (master student) who helped with the experimental part. This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme (COMPETE) and by national funds through the Foundation for Science and Technology (FCT) within the scope of the project POCI-01–0145-FEDER-007633. The first author has received grant from the Foundation for Science and Technology (FCT), with grant number: SFRH/BD/131282/2017. The second author acknowledges funding by Regione Lazio within the Research Project “SiCura, Sustainable technologies for the seismic protection of the cultural heritage” (2018–2020, N. 15136), by the Italian Civil Protection Department within the Research Project “ReLUIS” (2019–2021) and by the Italian Ministry of Education, University and Research (MIUR), in the frame of the Departments of Excellence Initiative (2018–2022), attributed to the Department of Engineering of Roma Tre University.
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Dalalbashi, A., De Santis, S., Ghiassi, B. et al. Slip rate effects and cyclic behaviour of textile-to-matrix bond in textile reinforced mortar composites. Mater Struct 54, 108 (2021). https://doi.org/10.1617/s11527-021-01706-w
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DOI: https://doi.org/10.1617/s11527-021-01706-w