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Carbon fiber rebar (CFRP rebar) is a structural reinforcing bar made from continuous carbon fibers combined with a polymer resin matrix. It is designed for concrete reinforcement where high tensile strength and corrosion resistance are critical.
The material is fully non-metallic, does not rust, remains stable in harsh environments, and maintains predictable mechanical behavior over long service cycles.
Carbon fiber reinforcement is part of the broader composite rebar family. For a complete overview of all composite types, you can refer to our FRP Rebar Pillar Page.
Carbon fibers carry extremely high axial loads with low strain. CFRP rebar commonly reaches tensile strengths several times higher than conventional steel reinforcement.
The density of carbon composites is significantly lower than steel. This simplifies transportation, bending logistics (prefabricated shapes), and manual placement on construction sites.
CFRP can be manufactured in standard-modulus or high-modulus grades depending on project requirements. This allows designers to match stiffness needs in structural members.
The composite structure does not react with chloride exposure, saltwater environments, or deicing chemicals, making it suitable for coastal, marine, and chemically aggressive environments.
Carbon fibers provide excellent fatigue resistance and long-term retention of mechanical properties. This is beneficial for high-cycle structures such as transportation platforms and industrial facilities.
Carbon fiber rebar is widely used in:
Marine structures such as jetties, piers, and seawalls
Bridge decks requiring lower dead load and long-term corrosion stability
Highway slabs and retaining walls near deicing salt exposure
Industrial floors exposed to chemicals or electromagnetic sensitivity
Tunnel linings where non-magnetic reinforcement is required
High-rise building components needing lightweight structural reinforcement
Precast concrete elements demanding predictable performance and reduced lifting weight
CFRP is commonly selected in projects where extended design life or minimal maintenance is required.
Strength: CFRP delivers significantly higher tensile strength.
Weight: Much lighter, enabling faster installation.
Corrosion: Fully resistant; steel requires coatings or design allowances.
Service Life: Longer in harsh environments.
Cost: Higher material cost but reduced lifecycle maintenance.
Strength Level: Carbon fiber offers higher tensile capacity and stiffness.
Application Fit: Better for heavily loaded structural elements.
Price: Usually the most premium composite option.
Thermal Expansion: More stable than glass-based rebar in temperature swings.
Carbon fiber rebar pricing is influenced by:
Fiber grade (standard-modulus vs high-modulus)
Resin system and curing process
Bar diameter
Surface profile (sand-coated, ribbed, spiral-wrapped)
Order quantity and project packaging
Regional logistics and export requirements
CFRP is generally priced above GFRP and basalt rebar, but its performance often reduces cost in long-term maintenance for high-value infrastructure.
For buyers comparing multiple reinforcement types, our Comprehensive FRP Rebar Guide provides a unified reference covering performance, standards, and manufacturing capabilities.
GTOFRP™ produces composite reinforcement using continuous pultrusion lines with controlled fiber alignment, consistent resin ratios, and engineered surface finishes.
Available features include:
Customizable diameters
High-modulus or standard CFRP options
Sand-coated or thread-wrapped bonding surfaces
Project-specific cut lengths
Export-ready packaging for bulk orders
Our engineering team supports structural designers with performance data suitable for early-phase design reviews.
1. Is carbon fiber rebar suitable for high-load concrete members?
Yes. Its high tensile strength makes it appropriate for bridge decks, beams, slabs, and critical structural components.
2. Does CFRP rebar replace steel in all applications?
Not entirely. It is used where corrosion resistance, weight reduction, or durability demands justify the material cost.
3. Can CFRP rebar be bent on-site?
No. Carbon fiber rebar must be produced in the required shapes during manufacturing.
4. What surface types are available?
Common options include sand coating and thread wrapping, both designed to enhance bond performance with concrete.
5. How is CFRP shipped internationally?
Typically in bundled coils or straight bars, depending on diameter. Export packaging is moisture-protected.
6. Is carbon fiber rebar compatible with standard concrete mixes?
Yes. No special concrete formulation is required.
Carbon fiber rebar provides a high-strength, lightweight, and corrosion-resistant solution for demanding concrete structures. It is particularly suitable for applications where long-term durability, reduced maintenance, and weight savings justify its performance advantages. For engineers evaluating multiple composite reinforcement options, CFRP serves as the premium category within modern non-metallic rebar systems and continues to gain adoption in global infrastructure projects.
