GFRP Reinforcing Rebar

GFRP rebar is an innovative product that combines fiber-reinforced plastic (FRP) with concrete to create a strong, durable structural element — the core of the FRP spiral column system.

Customized service:

Diameter Color Length
Winding method Surface Sandblasting Punch hole

Online Service Get Quote

Describe Solutions FAQ Contact us

GFRP rebar is an innovative product that pairs the strengths of fiber-reinforced plastic (FRP) with concrete to form a strong, durable structural element. FRP itself is a composite of a polymer matrix reinforced with fibers — glass, carbon, or polyester — giving it a high strength-to-weight ratio, corrosion resistance, and design flexibility, while concrete brings high compressive strength, fire resistance, and low cost. Combining the two, the FRP Spiral Column achieves enhanced load-bearing capacity, deformation behavior, and durability.

Gfrp rebar machine

Product Features

The GFRP spiral column consists of an outer FRP tube filled with concrete and reinforced internally with FRP spiral bars. The FRP tube confines the concrete core, raising its strength and ductility, while the FRP spiral bars add reinforcement that prevents strain-softening and improves the column’s stiffness and energy absorption.

It can be fabricated in various shapes and sizes — square, circular, or rectangular cross-sections — and the corner radius of square columns can be adjusted to optimize the FRP tube’s confinement effectiveness. The FRP tube can also be finished in different colors, textures, or patterns to meet a project’s aesthetic requirements.

Installation on site is straightforward with simple tools and techniques: the FRP tube is cut to length and joined with adhesive or mechanical connectors, the concrete is poured in using conventional methods or precast beforehand, and the FRP spiral bars are placed before or after curing depending on the design.

It withstands a wide range of environmental conditions and loads — axial compression, bending, shear, torsion, impact, earthquake, fire, or corrosion. The FRP tube shields the concrete from moisture, chemicals, and temperature swings, extending its service life, while the FRP spiral bars boost the concrete’s ductility and toughness so it can resist cracking or spalling under extreme loading.

Product Specifications

The table below summarizes typical specifications for the GFRP spiral column drawn from prior studies; these figures are for reference only and may vary with each project’s design parameters and material properties.

Parameter	Unit	Value
Height-to-width ratio	–	2.0
Corner radius (for square columns)	mm	15 – 45
FRP tube thickness	mm	2 – 4
FRP tube fiber volume fraction	%	40 – 60
FRP tube elastic modulus	GPa	20 – 40
FRP spiral bar diameter	mm	6 – 12
FRP spiral bar pitch	mm	30 – 60
FRP spiral bar fiber volume fraction	%	50 – 70
FRP spiral bar elastic modulus	GPa	40 – 60
Concrete compressive strength	MPa	20 – 60

Technical Summary & Engineering Insights

Executive Summary: Haikuo GFRP Rebar combines the high strength-to-weight ratio and design flexibility of fiber-reinforced polymer with concrete’s compressive strength — delivering a reinforced structural element that resists corrosion far longer than steel-reinforced concrete.

Performance Factor	Haikuo GFRP Rebar	Steel Rebar	Wood/Timber Support
Corrosion Resistance	Total immunity	Corrodes, causes spalling	Rots
Strength-to-Weight Ratio	High	Moderate	Low
Design Flexibility	High — pultruded to custom profiles	Limited to standard bar shapes	Limited
Electrical Conductivity	None	Conductive	None
Fire Resistance of the Concrete Element	Good, matches concrete’s own rating	Good	Poor

Targeted Product FAQ

Q1: What is GFRP rebar made of exactly?

A1: It’s a composite of continuous glass fiber roving impregnated with a thermosetting resin matrix, pultruded into rebar profiles with a ribbed or sand-coated surface for concrete bonding.

Q2: Is GFRP rebar heavier or lighter than carbon fiber rebar?

A2: GFRP (glass fiber) rebar is more economical than carbon fiber rebar while still delivering excellent corrosion resistance and strength for the vast majority of structural applications — carbon fiber is typically reserved for specialized high-performance projects.

Q3: Can GFRP rebar be used in swimming pools or water treatment tanks?

A3: Yes, this is a common application — the material’s total resistance to moisture and chemical exposure makes it ideal for pools, tanks, and other constantly-wet structures.

Q4: Do you offer technical support for first-time FRP rebar projects?

A4: Yes, our team can help confirm bar sizing, quantities, and answer technical questions for engineers and contractors using FRP rebar for the first time — contact us with your project details.

Q5: What certifications does your GFRP rebar carry?

A5: Our production is ISO 9001:2015 certified with independent test reports available — contact us for the specific documentation your project requires.