PSI - Issue 66

Sneha et al. / Procedia Structural Integrity 66 (2024) 419–425 Author name / Structural Integrity Procedia 00 (2025) 000–000

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 Hybrid fibres exhibit superior fibre bridging action, as observed through Digital Image Correlation (DIC), resulting in reduced crack opening compared to other fibre configurations, including the 1.5% and 2% variations. Achonologement The author would like to thank the Ministry of Education, India, for their financial support in the form of the PMRF scholarship and fracture fatigue laboratory, Indian Institute of Technology Roorkee, for the testing equipment. References 1. Richard P, Cheyrezy M. Composition of reactive powder concretes. Cem Concr Res. 1995;25(7):1501–11. 2. Benjamin A. G. Material Property Characterization of Ultra-High Performance Concrete. Fhwa. 2006. p. 186. 3. JS Lawler, D Zampini SS. Permeability of cracked hybrid fiber-reinforced mortar under load. Materials Journal [Internet]. 2002;99(4):379--385. Available from: https://www.concrete.org/publications/internationalconcreteabstractsportal/m/details/id/12220 4. Chun B, Yoo DY. Hybrid effect of macro and micro steel fibers on the pullout and tensile behaviors of ultra-high-performance concrete. Compos B Eng [Internet]. 2019;162(November 2018):344–60. Available from: https://doi.org/10.1016/j.compositesb.2018.11.026 5. Yoo DY, Je J, Choi HJ, Sukontasukkul P. Influence of embedment length on the pullout behavior of steel fibers from ultra-high performance concrete. Mater Lett [Internet]. 2020;276:128233. Available from: https://doi.org/10.1016/j.matlet.2020.128233 6. Kang ST, Choi J Il, Koh KT, Lee KS, Lee BY. Hybrid effects of steel fiber and microfiber on the tensile behavior of ultra-high performance concrete. Compos Struct [Internet]. 2016;145:37–42. Available from: http://dx.doi.org/10.1016/j.compstruct.2016.02.075 7. Wille, Kay and Naaman, Antoine E and El-Tawil S. Optimizing Ultra-High-Performance Fiber-Reinforced Concrete. Concrete international. 2011;33:9. 8. Yao W, Li J, Wu K. Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction. Cem Concr Res. 2003;33(1):27–30. 9. Meng S, Jiao C, Ouyang X, Niu Y, Fu J. Effect of steel fiber-volume fraction and distribution on flexural behavior of Ultra-high performance fiber reinforced concrete by digital image correlation technique. Constr Build Mater [Internet]. 2022;320(December 2021):126281. Available from: https://doi.org/10.1016/j.conbuildmat.2021.126281 10. Wang Q, Bao X, Yang J, Xu G, Zhang M. Investigation of Ultrahigh-Performance Concrete Fracture Characteristics with Different Steel Fiber Fractions Based on Acoustic Emission. Journal of Materials in Civil Engineering. 2023;35(12):1–14. 11. Li S, Chen X, Guo S. Evaluation of Fracture Process Zone in the Flexural Response of Different Concrete Materials Using DIC Method. KSCE Journal of Civil Engineering. 2020;24(8):2435–48. 12. Niu Y, Huang H, Zhang J, Jin W, Wei J, Yu Q. Development of the strain field along the crack in ultra-high-performance fiber reinforced concrete (UHPFRC) under bending by digital image correlation technique. Cem Concr Res [Internet]. 2019;125(June):105821. Available from: https://doi.org/10.1016/j.cemconres.2019.105821 13. Wu Z, Shi C, He W, Wu L. Effects of steel fiber content and shape on mechanical properties of ultra high performance concrete. Constr Build Mater [Internet]. 2016;103:8–14. Available from: http://dx.doi.org/10.1016/j.conbuildmat.2015.11.028