Steel Fiber Reinforcement in Cementitious Composites
Summary
Steel fiber reinforcement has emerged as a versatile strategy to enhance the mechanical performance and durability of cementitious materials. By dispersing short, discrete steel fibers throughout a mortar or concrete matrix, composites gain significant improvements in tensile strength, ductility and energy absorption capacity. Fibres bridge developing cracks, imparting residual tensile strength and contributing to multiple fine cracks rather than a single large fissure. This crack‐bridging mechanism enhances post‐cracking toughness and mitigates brittle failure, making steel fibre‐reinforced composites ideal for applications subject to dynamic loading, impact or fatigue. Optimization of fibre geometry, surface treatment and dosage enables tailoring of bond behaviour and composite performance: hooked or deformed end fibres improve mechanical anchorage, while fine fibres and coatings can enhance interfacial bonding and control workability. Global research has demonstrated the utility of steel fibres in tunnel linings, industrial pavements and repair mortars, offering accelerated construction schedules and reduced reliance on traditional reinforcement. Moreover, ultra-high‐performance concretes (UHPC) incorporating steel fibres exhibit exceptional compressive and flexural strengths, positioning them at the forefront of next-generation infrastructure materials.
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Steel Fiber Reinforcement in Cementitious Composites publication trend
The graph below shows the total number of articles in steel fiber reinforcement in cementitious composites across all publications each year (not limited to Nature Index journals).
Technical terms
Fiber–matrix interface: The region of contact between steel fibers and the cementitious matrix where stress transfer and bond mechanisms occur.
Interfacial Transition Zone (ITZ): A narrow band around each fibre characterized by distinct microstructure and porosity that influences composite behaviour.
Pull-out behaviour: The response of a fibre being extracted from the matrix under loading, indicative of bond strength and energy dissipation.
Residual tensile strength: The tensile load-bearing capacity retained by the composite after initial cracking due to fibre bridging.
Post-cracking behaviour: The performance of a composite beyond the first crack, including toughness and ductility provided by fibres.
References
- Bonding property between fiber and cementitious matrix: A critical review. Construction and Building Materials (2023).
- Anchorage Effects of Various Steel Fibre Architectures for Concrete Reinforcement. International Journal of Concrete Structures and Materials (2016).
- Anchorage mechanisms of novel geometrical hooked-end steel fibres. Materials and Structures (2017).
- Evaluation of the Tensile Characteristics and Bond Behaviour of Steel Fibre-Reinforced Concrete: An Overview. Fibers (2022).
- Effect of the roughness of steel fibre surface on its wettability and the cement paste close to fibre surface. Construction and Building Materials (2021).
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