Carbon Fiber Reinforcement in Cementitious Composites

Carbon fibres have emerged as a high-performance reinforcement in cementitious composites, offering exceptional tensile strength, low density and enhanced durability compared with traditional steel fibres. When uniformly dispersed within a cement matrix, carbon fibres can arrest microcrack propagation, improve post-crack ductility and extend service life under aggressive environmental conditions. Nevertheless, the inherently smooth and chemically inert surface of carbon fibres limits interfacial bonding, often leading to fibre pull-out rather than rupture. To counter this, researchers have developed a range of surface-engineering strategies—such as mineral impregnation, electrophoretic deposition of silica or quartz particles, plasma treatments and silane coupling—to promote mechanical interlock and chemical adhesion. These modifications enable nucleation of cementitious hydration products on the fibre surface, fostering stronger load transfer and enhanced toughness. Beyond structural reinforcement, carbon-fibre cementitious composites are being tailored for multifunctional roles, including thermal-energy harvesting and self-sensing, by integrating conductive networks or thermoelectric elements. Advances in expansive additives and chemical prestressing have also shown promise in activating the reinforcement in situ, pre-loading fibres to boost cracking resistance. As sustainability becomes ever more critical, incorporation of geopolymers, recycled fibres and low-carbon cements further aligns carbon-fibre composites with global decarbonisation goals, paving the way for resilient infrastructure in seismic regions, lightweight architectural panels and long-span precast elements.

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Carbon Fiber Reinforcement in Cementitious Composites publication trend

The graph below shows the total number of articles in carbon fiber reinforcement in cementitious composites across all publications each year (not limited to Nature Index journals).

Technical terms

Carbon fibre: A high-strength, low-weight reinforcement composed of carbon threads with superior tensile properties.

Cementitious composite: A construction material comprising a cement-based binder and dispersed reinforcement phases.

Interfacial bond: The adhesion and mechanical interlock at the interface between a reinforcement and the surrounding matrix.

Electrophoretic deposition: A method of depositing charged particles onto a conductive substrate under an electric field to form uniform coatings.

Pozzolanic reaction: A chemical reaction between siliceous or aluminous materials and calcium hydroxide leading to the formation of cementitious compounds.

Mineral-impregnated carbon fibre: Carbon fibre pre-coated with a mineral suspension to create structural grids or meshes within a cement matrix.

Chemical prestressing: The introduction of internal stress in concrete by expansive additives, thereby pre-tensioning embedded reinforcement.

References

1. Mineral-impregnated carbon-fiber based reinforcing grids as thermal energy harvesters: A proof-of-concept study towards multifunctional building materials. Energy and Buildings (2023).
2. Mineral-Based Coating of Plasma-Treated Carbon Fibre Rovings for Carbon Concrete Composites with Enhanced Mechanical Performance. Materials (2017).
3. Influence of electrophoretic deposition of micro- or nanosized silica particles on the microstructure of carbon fibers and their bond behavior with cementitious matrices. Materials and Structures (2024).
4. Effect of electrophoretic deposition of micro-quartz on the microstructural and mechanical properties of carbon fibers and their bond performance toward cement. Journal of Materials Science (2022).
5. Chemical prestressing of concrete thin plates reinforced with mineral-impregnated carbon fibre (MCF) composites. Engineering Structures (2024).