The composite reinforcement (G-FRP) that withstands more, weighs 70 % less and never corrodes. Designed in Spain for civil, marine and industrial infrastructure demanding 100+ years of service life with zero maintenance.
years of service life with no maintenance
one truck equals six of steel
of the weight of equivalent steel
recyclable at the end of its service life
GraphenBar® is a glass-fibre reinforced polymer (G-FRP) rebar, manufactured by pultrusion with a graphene-doped epoxy resin from Graphenano. It replaces steel in reinforced concrete, delivering strength, light weight and total immunity to corrosion — for those who specify structures built to last.
Provides stiffness, tensile strength and thermal insulation.
Thermoset matrix that binds the composite and makes it corrosion-proof.
Multiplies interlaminar strength — up to 2.5× compared to a graphene-free FRP.
Zero rust in water, chlorides, de-icing salts, acids or alkalis. No more steel repairs in marine works, bridges and wastewater treatment plants.
A bar weighs only 27 % of its steel equivalent. Fewer trucks, less crane work, lower risk and much faster installation.
Up to 3–4× the tensile strength of carbon steel, with a modulus >60 GPa and ultimate strain >1.7 %.
Does not conduct electricity or interfere with electromagnetic fields. Ideal for hospitals with MRI, data centres, substations and railway tunnels.
No sacrificial coatings and no cover repairs. Drastically reduces the total cost of ownership of the asset.
At the end of its life it is crushed together with the concrete and reused as aggregate. A carbon footprint far lower than steel.
We help you calculate the replacement, optimise diameters and estimate the savings on your site.
Wherever steel fails due to corrosion, weight or interference, GraphenBar® is the answer.
We design diameters and formats tailored to each project.
Data in an accessible format — readable by search engines and by engineers.
Values from the GraphenBar® FiberGlass Epoxy technical catalogue.
| Property | Metric | Imperial |
|---|---|---|
| Tensile strength | >1000 MPa | >145 ksi |
| Modulus of elasticity (Young's) | >60 GPa | >8702 ksi |
| Transverse shear strength | >220 MPa | >31,9 ksi |
| Ultimate strain | >1,7 % | — |
| Bond to concrete | ≥24 MPa | ≥3100 psi |
| Flexural strength (straight section) | >980 MPa | — |
| Glass transition temperature (Tg) | 130–140 °C | — |
| Density | 2,2 g/cm³ | — |
| Relative weight vs. steel | ≈27 % | — |
Data in an accessible format — readable by search engines and by engineers.
Values from the GraphenBar® FiberGlass Epoxy technical catalogue.
| Criterion | GraphenBar® | Carbon steel | Stainless steel | Aluminium |
|---|---|---|---|---|
| Weight (density) | ✓ 2,2 g/cm³ | 7,85 | 8,0 | 2,7 |
| Corrosion | ✓ Inmmune | High | Low | Medium |
| Conductivity / EMC | ✓ Insulating | Conductive | Conductive | Conductive |
| Tensile strength | ✓ >1000 MPa | ≈570 MPa | ≈520 MPa | ≈300 MPa |
| Service life | ✓ +100 years | Limited | High | Medium |
| Maintenance | ✓ None | High | Low | Medium |
| Carbon footprint | ✓ Reduced | High | Very high | High |
| GB® | Steel | kg/m | m/truck |
|---|---|---|---|
| #6 | 8 mm | 0,065 | 207.546 |
| #10 | 14 mm | 0,181 | 110.716 |
| #12 | 16 mm | 0,260 | 76.886 |
| #14 | 20 mm | 0,354 | 56.488 |
| #16 | 22 mm | 0,462 | 43.249 |
| #20 | 26 mm | 0,723 | 27.679 |
A single truck of GraphenBar® equals six of steel — less transport, fewer emissions and lower logistics costs.
Site manager · residential structure
GraphenBar® has a tensile strength above 1000 MPa (145 ksi); compared with steel, GraphenBar® can withstand more than 3 times the tensile load of steel before failure.
GraphenBar® has a tensile modulus above 67 GPa (9427 ksi); compared with steel, GFRP rebar is more flexible, absorbing energy better in an earthquake thanks to its performance and its density.
GraphenBar® has a tensile strain of between 1.5 % and 2.5 %.
Graphene fiberglass bars are available in standard sizes from 6 mm to 20 mm. Other sizes are available on request.
Tie the GRP rebar with stainless steel or nylon wire; you can also use cable ties or fiberglass-reinforced tape. If corrosion or electromagnetic fields are not a concern, you can also use wire.
GraphenBar® is much lower than the cost of stainless steel. GraphenBar® is priced below steel rebar and, once you factor in all the savings in labour costs, corrosion-protection additives, concrete cover and transport, the cost is far lower than that of steel rebar.
GraphenBar® is made of fiberglass, which is 100 % recyclable, and graphene epoxy resin. When embedded in concrete, the material can be crushed together with the concrete without needing to be removed after 100+ years, and can become part of the next recycled concrete, making that concrete far stronger.
Talk to one of our application engineers. We help you calculate replacements, optimise diameters and send you technical samples.
Replacement calculations, optimisation and technical samples.
Full data sheet, equivalence table and PDF catalogue.
An application engineer will reply within 24 working hours.
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