Repair Systems — Concrete & Structural Defects
CFRP strips & laminates
Technical product reference for carbon fibre reinforced polymer (CFRP) strips and laminates used in externally bonded reinforcement (EBR) schemes to restore or upgrade structural capacity of reinforcement-corroded concrete beams, slabs, columns, and walls — design to ACI 440.2R required.
CFRP strips and laminates for structural strengthening of reinforced concrete
Carbon fibre reinforced polymer (CFRP) strips and fabric laminates are bonded to the external surface of concrete beams, slabs, and columns to increase their flexural capacity, shear strength, or confinement. The two main forms are pultruded strips (bonded to beam/slab soffits) and woven fabric (applied by wet lay-up for columns and curved surfaces). All structural strengthening requires design by a qualified structural engineer.
Product Reference
Individual products — one card each — scroll to view all
Sika Australia
Sika CarboDur S
Pultruded CFRP plate (pre-cured laminate) for flexural strengthening
Sika CarboDur S is a pultruded, pre-cured unidirectional CFRP plate (laminate) bonded to the soffit as externally-bonded reinforcement for flexural strengthening, using Sikadur-30 adhesive. Factory-controlled thickness and properties. CONFIRM the design tensile strength, E-modulus, plate dimensions and pack against the current Sika Australia TDS.
Mapei Australia
Mapei MapeWrap C Uni-Ax
Unidirectional carbon-fibre fabric (wet layup)
Mapei MapeWrap C Uni-Ax is a unidirectional carbon-fibre fabric applied by wet layup with a MapeWrap epoxy primer and saturant for confinement, flexural and shear strengthening of concrete elements — conforming to columns and geometry a rigid plate cannot. CONFIRM the fabric weight, design tensile strength, E-modulus and the matched saturant system against the current Mapei Australia TDS.
Fosroc / Parchem
Fosroc Nitowrap CF
Carbon-fibre fabric (wet layup) — Nitowrap system
Fosroc Nitowrap CF is a carbon-fibre fabric applied by wet layup within the Fosroc Nitowrap strengthening system (Nitowrap 30 primer + Nitowrap 410 high-build saturant) for confinement and flexural/shear strengthening. CONFIRM the exact fabric designation, fabric weight and design tensile/modulus values against the current Fosroc / Parchem TDS.
System Comparison
CFRP strips & laminates — confirm all selections against the current manufacturer TDS before specifying.
Scroll the table sideways to see every column →
Do not confuse CFRP strips and laminates with:
- GFRP (glass fibre) wraps — glass fibre fabrics have a significantly lower tensile modulus than carbon fibre and are not equivalent for structural strengthening; do not substitute GFRP for CFRP without structural engineer review of the design
- Epoxy laminating resins (Sikadur-30, Adesilex PG1, Nitowrap EP) — these are the bonding adhesive component of the CFRP system; the CFRP strip or fabric and the laminating resin are separate paired products — both are required and must not be substituted independently
- Repair mortars — polymer-modified repair mortars reinstate concrete cover and section; CFRP provides additional external tensile capacity — they address different structural deficiencies and may both be required in a comprehensive repair
- Reinforcement mesh and bar — internal steel reinforcement and external CFRP are not equivalent — CFRP does not replace corroded internal bar for compression or combined loading without specific engineer design
- Structural epoxy adhesives for joints — Sikadur-31, Sikadur-32, and similar general structural epoxies are not CFRP laminating systems and must not be substituted for the system-specific bonding adhesive
Disclaimer
This page provides general technical information only. All CFRP strengthening schemes must be designed by a structural engineer to ACI 440.2R or AS 1640. Substrate pull-off testing, surface preparation, and cure verification are mandatory. Do not rely on this reference as a substitute for professional engineering advice.