PSI - Issue 64

Sareh Akbarpoor et al. / Procedia Structural Integrity 64 (2024) 822–832 Sareh Akbarpoor/ Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusion This study aimed to investigate the new developed cement-based adhesives for the NSM FRP system throughout pull-out tests with following findings: • Results underscore the potential of the developed adhesive as a promising alternative for strengthening systems requiring ductile bond performance. • The experimental findings suggest that the NSM FRP system utilising the developed cement-based adhesive achieved approximately 65% of the maximum bond stress observed for the system using epoxy adhesives. • Comparison with reported cement-based adhesives in the literature shows favourable performance of the developed cement-based adhesive, not only comparable maximum bond stress but also significantly higher fracture energy. This indicates superior ductility and post-peak performance, underscoring the effectiveness of the developed cement-based adhesive in enhancing the structural integrity of the NSM FRP system. Acknowledgements The first author acknowledges the grant provided by the Research Development Fund of Northumbria University with a reference number of RDF21/EE/MCE/REZAZADEHMohammadali. The second author would like to express appreciation for the support provided by the Royal Society research grant with Reference Number RG\R2\232002. The authors would also like to acknowledge the support provided by SIKA company for this research project. ACI 440.2R-17. 2017. Guide test methods for fiber-reinforced polymer (FRPs) composites for reinforcing or strengthening concrete structures. American Concrete Institute. Akbarpoor, S., Rezazadeh, M., Ghiassi, B., Khayatian, F., Poologanathan, K., Sefat, H. R., Corradi, M. 2024. A new bond-slip model for NSM FRP systems using cement-based adhesives through artificial neural networks (ANN). Construction and Building Materials, 427, 136034. Al-Abdwais, A., Al-Mahaidi, R. 2016a. Modified cement-based adhesive for near-surface mounted CFRP strengthening system. Construction and Building Materials, 124, 794-800. Al-Abdwais, A., Al-Mahaidi, R. 2016b. Bond behaviour between NSM CFRP laminate and concrete using modified cement-based adhesive. Construction and Building Materials, 127, 284-292. Al-Abdwais, A. H., Al-Mahaidi, R. S. 2017. Bond properties between carbon fibre reinforced polymer (CFRP) textile and concrete using modified cement-based adhesive. Construction and Building Materials, 154, 983-992. Al-Abdwais, A., Al-Mahaidi, R., Al-Tamimi, A. 2017. Performance of NSM CFRP strengthened concrete using modified cement-based adhesive at elevated temperature. Construction and Building Materials, 132, 296-302. Aljidda, O., El Refai, A., Alnahhal, W. 2023. Comparative study on the bond performance of near-surface mounted fiber-reinforced polymer bars. Construction and Building Materials, 364, 129923. Al-Saadi, N. T. K., Mohammed, A., Al-Mahaidi, R., Sanjayan, J. 2019. A state-of-the-art review: Near-surface mounted FRP composites for reinforced concrete structures. Construction and Building Materials, 209, 748-769. Alwash, D., Kalfat, R., Du, H., Al-Mahaidi, R. 2021. Development of a new nano modified cement based adhesive for FRP strengthened RC members. Construction and Building Materials, 277, 122318. References

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