Print Email Facebook Twitter Structural behaviour of reinforced concrete beams with self-healing cover zone as lost formwork Title Structural behaviour of reinforced concrete beams with self-healing cover zone as lost formwork Author He, S. (TU Delft Materials and Environment) Nuri, Masi (Student TU Delft) Jonkers, H.M. (TU Delft Materials- Mechanics- Management & Design) Lukovic, M. (TU Delft Concrete Structures) Schlangen, E. (TU Delft Materials and Environment) Department Materials- Mechanics- Management & Design Date 2024 Abstract This study investigates the structural behaviour and self-healing performance of hybrid reinforced concrete (RC) beams, enhanced with a 1.5-cm-thick self-healing cover composed of bacteria-embedded strain hardening cementitious composite (SHCC), for its potential in crack width control and crack healing. The research focuses on the performance under both flexural and shear loading, examining aspects such as load-bearing capacity, surface crack pattern, crack propagation between layers, and healing effectiveness. Results demonstrate the successful activation of the healing function, alongside improvements in structural performance. Under flexural loading, hybrid beams exhibited greater load-bearing capacity and significantly improved crack control ability. The maximum crack width of the hybrid beams exceeded 0.3 mm at 124.7 kN load, whereas in the control beam the largest crack exceeded 0.3 mm at only 59.8 kN load. Under shear loading, while the influence of the cover on structural capacity was minimal, it notably improved post-peak ductility and energy dissipation. Interface delamination was not observed in both cases. The results of the current study demonstrate the potential of delivering the self-healing mechanism precisely where it is most needed, which presents a scalable and economically viable strategy for integrating self-healing technology into standard construction practices. Subject crack width controlReinforced concrete beamsSelf-healingSHCC To reference this document use: http://resolver.tudelft.nl/uuid:d057af20-cea6-498d-8dc0-ae9216754919 DOI https://doi.org/10.1016/j.dibe.2024.100458 Source Developments in the Built Environment, 18 Part of collection Institutional Repository Document type journal article Rights © 2024 S. He, Masi Nuri, H.M. Jonkers, M. Lukovic, E. Schlangen Files PDF 1-s2.0-S266616592400139X-main.pdf 12.99 MB Close viewer /islandora/object/uuid:d057af20-cea6-498d-8dc0-ae9216754919/datastream/OBJ/view