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1.  What are FRP and GFRP rebar?

Fiber-reinforced plastic (FRP) is a composite material made of a polymer matrix reinforced with fibers.  FRP stands for Fiber Reinforced Polymer which includes basalt (BFRP), carbon (CFRP), and Glass Fiber-Reinforced Polymer (GFRP). Fiber-reinforced plastic is useful in terms of corrosion protection because it helps in preventing corrosion due to force application and deformation such as stress corrosion cracking. The fibers are usually glass (in fiberglass also known as GFRP), carbon (in the carbon-fiber-reinforced polymer), aramid, or basalt. The polymer is usually epoxy, vinyl ester, or polyester thermosetting plastic. It is commonly used in industries such as aerospace, construction, and marine to build structures that require added resistance to force in order to prevent deformation. 

2.  What are advantages of GFRP rebar?

Strength: Composite reinforcement offers strength characteristics 2-3 times higher than those of steel reinforcement, meeting the British standards for breaking strength.

Durability: The coefficient of thermal expansion for composite reinforcement closely matches that of concrete, minimizing micro-deformations and cracks, leading to increased overall durability.

Chemical Resistance: Composite reinforcement exhibits superior chemical resistance, making it highly durable in aggressive environments and resistant to corrosion.

Lightweight: Composite reinforcement, such as fiberglass, is up to 9 times lighter than steel while maintaining comparable strength.

Low Thermal Conductivity: The low thermal conductivity of composite reinforcement prevents “thermal bridges,” reducing heat loss by up to 34%, which lowers building conditioning costs.

Easy Installation: Composite reinforcing bars can be cut to any desired length, and can be fastened using plastic clips, special fasteners, or binding wire, making installation more convenient.

Easy Transportation and Storage: Composite reinforcement can be coiled, allowing for easier transportation and storage, even using smaller vehicles, resulting in significant cost savings.

3. How to replace steel rebar with GFRP rebar?

GFRP is twice as strong yet more flexible than steel rebar, behaving in a linear elastic manner until failure, which means it doesn’t have a defined yield point. Despite this, GFRP can withstand significantly higher loads. Engineers should adhere to specific Codes and Standards for GFRP rebar rather than those for steel. 

4. How to tie GFRP rebars?

Composite reinforcement can be bound using plastic clips, knitting wire, or special plastic fix-clips, which are faster and more cost-effective than traditional methods. 

5. How to install GFRP rebar?

When it comes to installing FiBAR®, the process is very similar to that of steel rebar. The super-lightweight material makes it easy for laborers to work on-site, improving their efficiency. To install FiBAR®, place it in the required position, ensuring it is correctly aligned and supported. Note that FiBAR® is a straight bar that cannot be bent post-curing, so it's important to use the appropriate lengths and sizes for your project. Once the FiBAR® is in place, it is possible to tie the rebars using plastic clips or plastic fix clips which can be quicker and easier than traditional tie wires. 

6. How to bend GFRP rebar?

As the physical and chemical properties are of thermoset material, GFRP rebar cannot be bent on site. You can get custom made bends as per your requirements from GFRPrebar.in

7.  What precautions to take while using GFRP rebar?

Always wear gloves and goggles, do not drag GFRP bar on rough surface, cut with a diamond/ carbide coated cutter blade, store in shade and carefully open coils of GFRP rebar

8. What sizes of GFRP rebar is available?

We provide diameter of 4, 6, 8, 10, 12, 16, 20, 25mm and custom diameter as well. The usual cut lengths of delivery are 6m. We also provide coils of 100-200m of GFRP rebars upto 12mm.