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comparison of gFRP Rebar vs Steel bar
GFRP Bent Crates for Heavy Loads
| Characteristics | GFRP Rebar | Steel Bar |
|---|---|---|
| Corrosion resistance to aggressive environments | Non-corrosive | Corrosive |
| Electric conductivity | Non-conductive | Conductive |
| Conductive | High Non-conductive | Low |
| Thermal conductivity | Low | High |
| Strength at stretching, MPa | 1300 | 390 |
| Compressive Strength, MPa | 550 | 400 |
| Transverse Shear Strength, Mpa | 220 | 300 |
| Bond strength to concrete, Mpa | > 20 | > 12 |
| Ultimate strain, % | 1.5 – 2% | 15% |
| Modulus of elasticity, Gpa | 65 | 160-200 |
| Density, kg/m3 | 2100 | 7800 |
| Working temperature range, ºС | –70…+160 | –70…+50 |
| Magnetic properties | Diamagnet | Conductor |
| Durability | Not less than 80 years | According to building codes |
Various Application of GFRP Rebar
GFRP (Glass Fiber Reinforced Polymer) rebar, also known as FRP Rebar or epoxy coating for rebar, is a composite material used as an alternative to steel reinforcement in construction projects. Due to its unique properties, it offers several advantages, making it suitable for various applications.
1. Corrosion-Resistant Structures.
- Marine Structures: Used in seawalls, docks, and piers where saltwater causes steel rebar to corrode.
- Bridge Decks: Prevents corrosion from de-icing salts and harsh weather conditions.
- Water Treatment Plants: Ideal for structures exposed to chemicals and moisture.
2.Non-Magnetic and Non-Conductive Applications.
- MRI Rooms: GFRP rebars 's non-magnetic nature prevents interference with sensitive imaging equipment.
- Electric Power Stations: Used in foundations to minimize electrical conductivity and interference.
3. Lightweight and High-Strength Structures.
- Highways and Roadways: Reinforces concrete in overpasses, barriers, and pavements while reducing transportation and handling costs.
- Tunnels: Used in tunnel linings and segments due to its lightweight and ease of installation.
4. Specialized Applications.
- Architectural Features: Supports concrete elements in buildings where aesthetics or shape retention is critical.
- Mining and Underground Works: Resistant to moisture, chemicals, and harsh environments.
- Nuclear Facilities: Avoids the risk of rebar degradation in radiation-exposed environments.
5.Temporary Structures.
- Demolition-Ready Projects: Easier to cut through than steel, making it suitable for temporary construction needing later modification or removal.
6. Innovative Projects.
- Offshore Wind Turbine Foundations: Durable in extreme marine environments.
- Green Building Initiatives: Contributes to sustainability due to its long lifespan and low maintenance needs.
Advantages of Using GFRP Rebar:
- Corrosion Resistance: Doesn't rust, ensuring a longer lifespan.
- Lightweight: Up to four times lighter than steel, reducing handling costs.
- High Tensile Strength: Comparable or superior to steel.
- Non-Conductive and Non-Magnetic: Suitable for projects requiring electromagnetic neutrality.
- Thermal Compatibility: Matches thermal expansion coefficients of concrete.
By integrating GFRP rebar and Epoxy Rebar, projects can achieve long-term cost savings, enhance structural integrity, and effectively address specific engineering challenges in demanding environments.
service related FAQ's
Products made of glass fibre reinforced polymer have a high durability and can withstand many years without compromising their structure. Polymers age very slowly, In addition, external influences such as humidity, heat or UV rays hardly deteriorate their properties and they are extremely resistant in aggressive environments.
While certain care must be taken while storing Titan Bar (GFRP) on site, it is easy.
- DO NOT store Titan Bar (GFRP) in direct sunlight for longer period. ALWAYS store in shade. Whereas, storing GFRP rebars under rain has no effect as the material does not corrode
- DO NOT drag Titan Bar (GFRP) on ground or across sharp edges.
- ALWAYS use proper hoisting equipment and multiple lifting points when handling linear (for size 12mm and above), non-linear and bent Titan Bar (GFRP)
FRP (Fiber Reinforced Polymer) and GFRP (Glass Fiber Reinforced Polymer) are both types of composite materials commonly used in construction, engineering, and various other industries due to their high strength, lightweight, and corrosion-resistant properties. Here’s a breakdown:
FRP (Fiber Reinforced Polymer):
- Definition: FRP is a composite material made by reinforcing a polymer matrix with fibers, which can be made from various materials like glass, carbon, or aramid.
- Components: The polymer (often a resin) acts as the matrix or binder, holding the fibers together and transferring load among them. The fibers, in turn, provide the composite with strength and rigidity.
- Properties: FRP materials are strong, lightweight, and highly resistant to corrosion, making them suitable for environments where traditional materials like steel might corrode or deteriorate.
- Applications: FRP is widely used in construction, aerospace, automotive, and marine industries due to its durability and versatility.
GFRP (Glass Fiber Reinforced Polymer):
- Definition: GFRP is a specific type of FRP that uses glass fibers as the reinforcement material.
- Properties: Glass fibers give GFRP a unique combination of strength, flexibility, and light weight. GFRP also has excellent corrosion resistance, which makes it especially useful for structures exposed to moisture, chemicals, or salt.
- Applications in Civil Engineering: GFRP is frequently used in construction as rebar (reinforcing bar) for concrete structures, especially in harsh environments such as coastal or marine infrastructure, bridges, tunnels, and roadways. Its durability and longevity make it a cost-effective alternative to steel in many cases.
Overall, both FRP and GFRP are valued for extending the life of structures and reducing maintenance costs, especially in demanding environments.
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GFRP rebars are 1/4th weight of steel rebars due to the composite materials used in manufacturing, making its density only about 1900 kg/cu.m.
