Bioinspired eco-friendly coating technology for enhanced steel fibre bonding and sustainability in cementitious materials

Ismail, Abdulmalik, Alshahrani, Abdullah, Alawode, Abdulmaliq and Kulasegaram, Sivakumar ORCID: https://orcid.org/0000-0002-9841-1339 2025. Bioinspired eco-friendly coating technology for enhanced steel fibre bonding and sustainability in cementitious materials. Construction and Building Materials 467 , 140408. 10.1016/j.conbuildmat.2025.140408

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Abstract

Over recent years, steel fibres have been widely recognised as an effective means of enhancing the ductility of concrete structures. However, the dosage of steel fibres in concrete is typically limited to avoid placement challenges and potential mechanical issues. Current steel fibre modification methods often lack scalability or compromise durability. This study introduces a novel, eco-friendly, scalable, and durable bioinspired coating technology for steel fibres. To validate the effectiveness of this coating, scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) were employed to analyse the microscale surface morphology of the coated fibres. Single-fibre pull-out tests were also conducted to compare the pull-out energy, bond strength, and interfacial shear strength of coated versus uncoated fibres across varying matrix strengths. The results showed a 22.6 % improvement in fibre/matrix bonding, a 33.4 % increase in pull-out energy, and a 21.4 % enhancement in interfacial shear strength. This cost-effective coating technology not only improves performance but also offers potential reductions in cement demand for high-strength concrete applications, presenting promising advancements in both sustainability and concrete performance.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Publisher:	Elsevier
ISSN:	0950-0618
Date of First Compliant Deposit:	24 February 2025
Date of Acceptance:	10 February 2025
Last Modified:	26 Feb 2025 12:30
URI:	https://orca.cardiff.ac.uk/id/eprint/176427

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