PSI - Issue 64

Amrita Milling et al. / Procedia Structural Integrity 64 (2024) 1009–1016 Milling/ Structural Integrity Procedia 00 (2024) 000 – 000

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Roving breakage emerged as the dominant failure mechanism under both loading conditions at the end of the tests. Additionally, telescopic failure - sliding of the interior and external basalt filaments of the warp rovings was noted (Fig.6b).

Fig.6. Specimens after fracture (a) QS-0.0086/s (b) QS-0.0094/s.

Conclusion The tensile characteristics of BTRM composites under quasi-static and intermediate dynamic strain rates were explored. The results indicated that the relationships between stress and strain were tri-linear in the range of 0.005 < ̇ ≤ 0.01 /s and bi-linear in the dynamic range of 0.5 < ̇ ≤ 10 Ȁ•Ǥ The transition from quasi-static to dynamic loading rates led to improved tensile strength, ultimate tensile strain, toughness, and first cracking stress within the composite. Also, the BTRM composites showed similar crack propagation and failure mechanisms at quasi-static and intermediate dynamic strain rates. Acknowledgements Financial support for this research was provided by the Engineering & Physical Sciences Research Council (EPSRC), United Kingdom. References ACI Committee 434. (2011). Acceptance criteria for masonry and concrete strengthening using fiber-reinforced cementitious matrix (FRCM) composite systems. ICC-Evaluation Service, Whittier, CA , 324 . https://doi.org/10.14359/51702356 Ascione, L., Carozzi, F. G., D’Antino, T., & Poggi, C. (2018). New Italian guidelines for design of externally bonded Fabric -Reinforced Cementitious Matrix (FRCM) systems for repair and strengthening of masonry and concrete structures. Procedia Structural Integrity , 11 , 202-209. Brameshuber, W., Hinzen, M., Dubey, A., Peled, A., Mobasher, B., Bentur, A., Aldea, C., Silva, F., Hegger, J., & Gries, T. (2016). Recommendation of RILEM TC 232-TDT: test methods and design of textile reinforced concrete: Uniaxial tensile test: test method to determine the load bearing behavior of tensile specimens made of textile reinforced concrete. Materials and Structures/Materiaux et Constructions , 49 (12), 4923-4927. British Standards Institution. (2019). BS EN 1015-11:2019: Methods of test for mortar for masonry. Determination of flexural and compressive strength of hardened mortar. In: BSI. D'Anna, J., Amato, G., Chen, J. F., Minafò, G., & La Mendola, L. (2021). Experimental application of digital image correlation for the tensile characterization of basalt FRCM composites. Construction and Building Materials , 271 , 121770. de Andrade Silva, F., Butler, M., Mechtcherine, V., Zhu, D., & Mobasher, B. (2011). Strain rate effect on the tensile behaviour of textile-reinforced concrete under static and dynamic loading. Materials Science and Engineering: A , 528 (3), 1727-1734. Ghiassi, B. (2019). Mechanics and durability of lime-based textile reinforced mortars. RILEM Technical Letters , 4 , 130-137. Gong, T., Heravi, A., Alsous, G., Curosu, I., & Mechtcherine, V. (2019). The impact-tensile behavior of cementitious composites reinforced with carbon textile and short polymer fibers. Applied Sciences , 9 (19), 4048. Heravi, A. A., Gong, T., & Mechtcherine, V. (2019). Mechanical characterization of textile reinforced concrete (TRC) subject to dynamic tensile loading. Proceedings of the 7th International Colloquium on Performance, Protection & Strength of Structures Under Extreme Loading Events PROTECT, Peled, A., Bentur, A., & Mobasher, B. (2017). Textile reinforced concrete (Vol. 19). CRC Press. Truong, V. D., Noh, H. W., & Kim, D. J. (2022). Rate-sensitive tensile resistance of glass textile reinforced cementitious composites. Construction and Building Materials , 360 , 129553. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2022.129553 Zhu, D., Peled, A., & Mobasher, B. (2011). Dynamic tensile testing of fabric – cement composites. Construction and Building Materials , 25 (1), 385-395.