Corrosion Resistance in Fiber-Reinforced Concrete Systems

Fibre-reinforced concrete (FRC) has emerged as a versatile material to mitigate the initiation and progression of corrosion in reinforced structures. By incorporating dispersed discontinuous fibres such as steel, polymeric or glass into the cementitious matrix, FRC enhances tensile strength and ductility, controls crack widths and refines pore networks. The synergy between crack-bridging by fibres and improved matrix densification reduces pathways for aggressive agents, notably chloride ions and carbon dioxide, to reach embedded steel. Modern FRC systems often integrate supplementary cementitious materials and corrosion inhibitors, further improving the passive protection of steel reinforcement. Recent efforts focus on optimising fibre types, dosages and hybrid combinations to tailor the interfacial transition zone, minimise porosity and delay depassivation. This approach has global significance for marine, de-icing and industrial environments, where infrastructure durability and life-cycle costs are paramount. Practical applications range from coastal bridges and tunnel linings to offshore platforms and precast elements, where enhanced corrosion resistance can extend service life and reduce maintenance interventions.

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Corrosion Resistance in Fiber-Reinforced Concrete Systems publication trend

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Technical terms

Fibre-reinforced concrete (FRC): A composite material in which short, dispersed fibres are added to a cementitious matrix to enhance tensile capacity, ductility and crack control.

Chloride diffusion coefficient: A parameter quantifying the rate at which chloride ions migrate through the concrete pore structure under concentration gradients.

Interfacial transition zone (ITZ): The microstructural region surrounding fibres where the cement paste and aggregate meet, critical for bond strength and transport properties.

Pitting corrosion: Localised corrosion process characterised by the formation of small cavities or “pits” on the steel surface due to chloride attack.

References

1. Effect of fibers on chloride transport in mortars under unsaturated and saturated conditions. RSC Advances (2023).
2. Corrosion Behavior of Fiber-Reinforced Concrete—A Review. Fibers (2022).
3. Correlation between concrete cracks and corrosion characteristics of steel reinforcement in pre-cracked plain and fibre-reinforced concrete beams. Materials and Structures (2020).
4. Corrosion Effects on the Strength Properties of Steel Fibre Reinforced Concrete Containing Slag and Corrosion Inhibitor. International Journal of Corrosion (2014).