- info@bigbulls.global
- +91-98121-81243
Our Products
GFRP Rebar
bigBulls is the GFRP (FRP) rebar manufacturer in India, with specializing in GFRP (Glass Fiber Reinforced Polymer) rebar- a type of FRP rebar. Bigbulls boasts comprehensive in-house testing facilities adhering to ACI-440.1R-15 and BIS 18256-2023 standards. Currently, Bigbulls offers GFRP straight bars in diameters ranging from 3mm to 25mm and bent stirrups from 6mm to 25mm.
GFRP rebar stands for Glass Fiber Reinforced Polymer rebar and is a specific type of FRP rebar used in concrete structures as an alternative to traditional steel rebar. GFRP rebar is made of glass fibres embedded in a polymer resin matrix, typically vinyl ester or epoxy resins. The glass fibres provide tensile strength, while the polymer resin binds the fibres together.
GFRP (Glass Fiber Reinforced Polymer) rebars are manufactured using an extrusion process, which can produce both straight and bent rebars. The manufacturing process involves two distinct forms, each tailored to meet specific requirements.
- Straight GFRP Rebars: Made by extruding a mix of glass fibres and thermoset resins through a heated die, producing solid, cured rebars ready for cutting and packaging.
- Bent GFRP Rebars: Similar extrusion process but the material remains partially cured, allowing it to be bent into various shapes like hooks or stirrups before full curing.
Once the desired bend shape is achieved, the partially cured GFRP rebar is subjected to a controlled heating process, typically in an oven or a heated moulding setup. This post-bending heat treatment fully cures and solidifies the polymer matrix, locking in the desired shape and ensuring the rebar’s structural integrity.
Applications
Advantages Of bigBulls Rebar
Corrosion Resistance
Glass Fiber Reinforced Polymer rebar resists corrosion and electrochemical degradation, ensuring long-term durability and structural integrity in harsh environments such as marine, soil, or urban settings.
Extended Service Life
By eliminating rust and corrosion risks, GFRP rebar extends the lifespan of structures like boundary walls, roads, foundations, and tanks, reducing maintenance and repair costs.
Lightweight and High Strength
With a high strength-to-weight ratio, GFRP rebar is lighter than steel but maintains excellent tensile strength, facilitating easier handling, reduced labour costs, and more efficient construction processes.
Non-Conductive Properties
The non-conductive nature of GFRP rebar prevents stray current-induced corrosion, enhancing durability in areas with electrical installations or cathodic protection systems.
Cost Savings
Using GFRP rebar results in substantial cost savings over the lifecycle of structures due to reduced maintenance and repair needs, as well as potentially lower installation costs.
Sustainable Construction
GFRP rebar supports environmentally conscious practices by reducing the carbon footprint associated with frequent repairs and replacements, contributing to greener construction solutions.
Improved Structural Performance
The corrosion resistance of GFRP rebar helps prevent concrete cracking and spalling, maintaining structural integrity and load-bearing capacity in foundations, columns, beams, and other elements.
Versatility
GFRP rebar is suitable for various applications, including boundary walls, concrete roads, foundations, piles, retaining walls, and underground tanks, providing design flexibility and adaptability.
Enhanced Seismic Performance
GFRP rebar’s high tensile strength and elastic behaviour improve the seismic performance of structures, offering increased ductility and energy dissipation capacity.
Improved Constructability
The lightweight nature of GFRP rebar simplifies handling and installation, improving construction efficiency and reducing the risk of errors
Improved Leak Resistance
In underground tanks, GFRP rebar helps improve leak resistance by minimizing the risk of concrete cracking and spalling caused by reinforcement corrosion, ensuring better watertightness.
Magnetic Transparency
GFRP Rebars are non-magnetic and contain no IONS. Hence are ideal reinforcement for areas close to magnetic apparatus – such as hospital MRI rooms, Electronic testing devices and certain high-voltage applications.
Why Choose Us
Innovation At bigBULLS Insulations, innovation is hard-coded into our DNA. Our team of engineers and material scientists continuously push the boundaries of GFRP technology through dedicated research and development. We don’t just manufacture GFRP products, we pioneer new composite formulations and applications that outperform traditional materials.
Advanced Manufacturing
Our state-of-the-art manufacturing facilities utilize cutting-edge techniques like pultrusion to produce consistent, high-quality GFRP components. Stringent quality control and testing ensure our products meet or exceed industry standards across dimensions, strength, and durability parameters.
Extensive Product Range
bigbulls offers one of the most comprehensive GFRP product portfolios including rebar, structural profiles, pipes, tanks, cable trays, gratings, ladders and handrails. Whatever your project requirements, we have the right GFRP solution for unmatched strength and longevity.
Technical Expertise
Our team has cumulative decades of experience in advanced composite design, engineering and manufacturing. We collaborate closely with customers to understand their challenges and requirements, providing end-to-end technical guidance from concept to installation.
Sustainable Solutions
GFRP’s lower carbon footprint makes it an environmentally sustainable choice over steel and concrete for infrastructure projects. Our products promote green construction while delivering the strength and longevity needed for resilient assets.
Cost-Effectiveness
While superior performing, GFRP products offer lower lifetime costs compared to steel, aluminium and concrete alternatives. With their corrosion resistance and low maintenance needs, Bigbulls”s GFRP solutions deliver great value over an extended service life.
| METAL REBAR | DIA | FIBERGLASS REBAR (FRP) | |
|---|---|---|---|
| 0.66 kg | 3 | = | 0.16 kg |
| 0.91 kg | 3.5 | = | 0.22 kg |
| 1.5 kg | 4.5 | = | 0.36 kg |
| 2.66 kg | 06 | = | 0.64 kg |
| 4.74 kg | 08 | = | 1.15 kg |
| 7.41 kg | 10 | = | 1.79 kg |
| 10.67 kg | 12 | = | 2.58 kg |
| 18.96 kg | 16 | = | 4.58 kg |
| 24.00 kg | 18 | = | 5.81 kg |
| 29.63 kg | 20 | = | 7.16 kg |
| 46.30 kg | 25 | = | 11.19 kg |
| (-) Equal ultimate stress | *These are approx values | ||
Bigbulls FRP REBAR VS STEEL
Bigbulls FRP rebar outperforms steel with twice the tensile strength and up to seven times lighter weight. Unlike steel, it is rustproof, ensuring greater durability and reduced maintenance. It provides superior performance and longevity in harsh environments compared to traditional steel rebar.
Stronger
2X the tensile strength compared to steel
Lighter
Up to 7x lighter in concrete flatwork applications 4x lighter compared to the same size diameter
Rustproof
Fiberglass rebar will never rust, enabling more durable structure
Technical Specifications
GFRP rebars offers many advantages over steel rebars. The general properties of Steel reinforcement differ from GFRP REBARS and design engineers consider the same when they design the construction structures. Designers use and refer to ACI 440.1R-15 when they design the structures.
| Material | Steel | GFRP |
|---|---|---|
| Tensile Strength [MPa]/N/mm2 | 500 | 1000+ |
| Shear strength | 120 | 155 |
| Bond strength Mpa/ N/mm2 | 14* | 12 |
| Compression (MPa/N/mm2) | 500 | 450 |
| Modulus of Elasticity [Gpa] | 160-200 | 60 |
| Elongation [%] | 25 | 1.5 |
| Durability | Terms are prescribed in special building codes | 80 years + |
| Density [ton/m³] | 7.8 | 1.9 |
| Corrosion resistance to aggressive environment | Appearance of rust products | Stainless material preserving properties even in alkaline concrete environment |
| Ecological compatibility | Ecologically friendly material | Does not emit harmful and toxic substances during storage and use |
| Electrical conductivity | Electrically conductive material | Dielectric |
Frequently Asked Questions
-
What is FRP Rebar?
FRP Rebar (Fiber Reinforced Polymer Rebar) is a high-strength, lightweight, non-corrosive reinforcement rod made from fiberglass and resin. It is used as an alternative to steel rebar in concrete structures where corrosion resistance is critical.
-
Where is FRP Rebar typically used?
FRP Rebar is used in:
- - Bridges and highways
- - Coastal and marine structures
- - Tunnels and subways
- - Water treatment plants
- - Foundations, retaining walls, and slabs
- - MRI rooms and electrical substations
-
Is FRP Rebar cost-effective?
While the initial cost may be higher than steel, lifetime savings are significant due to zero corrosion, reduced maintenance, and longer service life
-
Can FRP Rebar be customized?
Yes, bigBULLS Rebars offers customizable designs, colours, and sizes to meet specific project requirements
-
How is GFRP rebar manufactured?
GFRP rebar is produced using an extrusion process. Straight rebars are fully cured during extrusion, while bent rebars remain partially cured to allow shaping before final curing.
-
What are the key benefits of using GFRP rebar?
Benefits include corrosion resistance, extended service life, lightweight with high strength, non-conductive properties, and cost savings due to reduced maintenance and repair needs.
-
How does GFRP rebar compare to steel rebar?
GFRP rebar is twice as strong as steel in tensile strength, up to seven times lighter, and rustproof, offering enhanced durability and efficiency over traditional steel rebar.
-
What are the limitations of GFRP rebar?
GFRP rebar is brittle with low ductility, making it unsuitable for on-site bending. It must be factory-bent to meet design specifications.
-
Can GFRP rebar be used in high-voltage or magnetic environments?
Yes, GFRP rebar is non-magnetic and free of ions, making it ideal for areas near magnetic apparatus, such as MRI rooms and electronic testing devices.
-
How does GFRP rebar benefit eco-friendly construction?
GFRP rebar lowers carbon footprints by reducing repair needs, enhancing durability, and promoting sustainable building practices through greener construction solutions.