Unleasing the power of GFRP
A Revolution Beyond Steel
GFRP, a revolution beyond steel highlights the emergence of Glass Fiber Reinforced Polymer (GFRP) as a potentially transformative material in various industries, promising advancements that go beyond the conventional uses of steel. With potential benefits, innovations, and paradigm shifts that GFRP could bring to the forefront. Let's delve into the explanation.
Introducing GFRP Bars
GFRP, or Glass Fiber Reinforced Polymer, is a lightweight and strong composite material gaining traction in construction. It blends plastic resin with glass fibers, delivering durability and weight savings. Compared to steel, GFRP excels with strength, corrosion resistance, and design flexibility. It's used in structural components like bars, grids, panels, and profiles, revolutionizing construction with sustainable and innovative solutions.
GFRP bars replace steel rebar in concrete structures. They excel in corrosion resistance due to their immunity to rust and chemicals. Being 75% lighter than TMT bars, GFRP bars are easily manageable and transportable. Their strong yet light nature matches or surpasses steel's structural prowess.
GFRP BAR VS TMT BAR / CRS TMT BAR / STAINLESS STEEL TMT BAR
TECHNICAL COMPARISON
Table Of Substitution
| PROPERTIES OF TMT BARS | GFRP | COMPARISON | |
|---|---|---|---|
| Tensile strength MPa | 500 min | 800-1100 | Stronger |
| Weight/Meter 8mm | 0.395 kg | 0.080kg | Lighter |
| Bar Length | 12 meter | upto 100 meters | Better improvement |
| Durability embedded | 50 years | (+) 100years | More durable |
| Class III and IV | (+/-)5 years | (+) 100 years | More durable |
| Corrosion resistance | No | Yes | More durable |
| Electric conductivity | Yes | No | No accidents risk |
| Thermal conductivity | Yes | No | Does not dissipate heat |
| Concrete covering | 35mm – 45mm | 20mm | Lower concrete volume |
| Shear Strength | 120 | 170 | Higher |
| Bond strength MPa/N/mm^2 | 14* | 12.5 | Lower |
| Compression MPa/N/mm^2 | 500 | 450 | Lower |
| Modulus of Elasticity [Gpa] | 160-200 | 65 | Lower |
| Elongation [%] | 12% (min.) | 4% (max.) | Lower |
| Density [ton/m^3] | 7.8 | 1.9 | Lower |
Table Of Substitution
TMT/CRS/STAINLESS STEEL TMT BAR (500 GRADE)
| Diameter mm | Weight (per 12 meter bar) kg | Tensile strenght N |
|---|---|---|
| 4 | 0.099 | 6300 |
| 5 | 0.154 | 9800 |
| 6 | 0.222 | 14150 |
| – | – | – |
| 8 | 0.395 | 25150 |
| 10 | 0.617 | 39250 |
| 12 | 0.888 | 56550 |
| – | – | – |
| 14 | 1.21 | 77000 |
| 16 | 1.58 | 100500 |
| 18 | 2 | 127000 |
| 20 | 2.47 | 157000 |
| – | – | – |
| 25 | 3.85 | 245500 |
| 32 | 6.31 | 400500 |
| 36 | 7.99 | 509000 |
| 40 | 9.87 | 628500 |
ADVANCED GFRP REBARS
| Diameter mm | Weight (per 12 meter bar) kg | Tensile strenght N |
|---|---|---|
| 4 | 0.021 | 8000 |
| 5 | 0.030 | 13800 |
| 6 | 0.051 | 21200 |
| 7 | 0.066 | 30200 |
| 8 | 0.084 | 40700 |
| 10 | 0.137 | 66400 |
| 12 | 0.202 | 86546 |
| 13 | 0.250 | 103816 |
| – | – | – |
| 16 | 0.360 | 165046 |
| – | – | – |
| 20 | 0.620 | 268666 |
| 22 | 0.664 | – |
| 25 | 0.907 | 433516 |
| 32 | 1.284 | – |
| – | – | – |
| – | – | – |
| PROPERTIES OF TMT BARS | GFRP | COMPARISON | |
|---|---|---|---|
| Tensile strength MPa | 500 min | 800-1100 | Stronger |
| Weight/Meter 8mm | 0.395 kg | 0.080kg | Lighter |
| Bar Length | 12 meter | upto 100 meters | Better improvement |
| Durability embedded | 50 years | (+) 100years | More durable |
| Class III and IV | (+/-)5 years | (+) 100 years | More durable |
| Corrosion resistance | No | Yes | More durable |
| Electric conductivity | Yes | No | No accidents risk |
| Thermal conductivity | Yes | No | Does not dissipate heat |
| Concrete covering | 35mm – 45mm | 20mm | Lower concrete volume |
| Shear Strength | 120 | 170 | Higher |
| Bond strength MPa/N/mm^2 | 14* | 12.5 | Lower |
| Compression MPa/N/mm^2 | 500 | 450 | Lower |
| Modulus of Elasticity [Gpa] | 160-200 | 65 | Lower |
| Elongation [%] | 12% (min.) | 4% (max.) | Lower |
| Density [ton/m^3] | 7.8 | 1.9 | Lower |
Table Of Substitution
TMT/CRS/STAINLESS STEEL TMT BAR (500 GRADE)
| Diameter mm | Weight (per 12 meter bar) kg | Tensile strenght N |
|---|---|---|
| 4 | 0.099 | 6300 |
| 5 | 0.154 | 9800 |
| 6 | 0.222 | 14150 |
| – | – | – |
| 8 | 0.395 | 25150 |
| 10 | 0.617 | 39250 |
| 12 | 0.888 | 56550 |
| – | – | – |
| 14 | 1.21 | 77000 |
| 16 | 1.58 | 100500 |
| 18 | 2 | 127000 |
| 20 | 2.47 | 157000 |
| – | – | – |
| 25 | 3.85 | 245500 |
| 32 | 6.31 | 400500 |
| 36 | 7.99 | 509000 |
| 40 | 9.87 | 628500 |
ADVANCED GFRP REBARS
| Diameter mm | Weight (per 12 meter bar) kg | Tensile strenght N |
|---|---|---|
| 4 | 0.021 | 8000 |
| 5 | 0.030 | 13800 |
| 6 | 0.051 | 21200 |
| 7 | 0.066 | 30200 |
| 8 | 0.084 | 40700 |
| 10 | 0.137 | 66400 |
| 12 | 0.202 | 86546 |
| 13 | 0.250 | 103816 |
| – | – | – |
| 16 | 0.360 | 165046 |
| – | – | – |
| 20 | 0.620 | 268666 |
| 22 | 0.664 | – |
| 25 | 0.907 | 433516 |
| 32 | 1.284 | – |
| – | – | – |
| – | – | – |
Advantages of GFRP Bars
Stronger than Steel
Glass Fiber Reinforced Polymer (GFRP) is considered to be significantly stronger than conventional materials like steel in certain aspects due to its unique composition and properties.
Upto 80% Lighter than TMT Bars
GFRP bars, mesh, and bent elements are custom-made to precise dimensions, reducing waste and minimizing rebar scraps during construction.
Upto 30% Savings as Compared to TMT Bars
GFRP bars can offer cost savings of up to 30% when compared to traditional TMT bars, making them a cost-effective alternative.
No Theft in Transit / Site of TMT Bars
As GFRP Rebars have specific application and no resale value in the open market, they are not prone to theft of TMT bars during transit or theft at site. This will further help reduce project costs by lacs of rs.
Saving in Overlapping Cost of TMT Bars
GFRP elements do not require overlapping as traditional TMT bars do, resulting in cost savings on materials and labor.
Reduction of Rebar Scraps
GFRP bars, mesh, and bent elements are custom-made to precise dimensions, reducing waste and minimizing rebar scraps during construction.
Rust Proof
Unlike steel bars, GFRP bars are rust-proof, ensuring a longer lifespan and minimizing maintenance needs.
Highly Chemical Resistant
GFRP is highly resistant to chemical corrosion, making it ideal for use in aggressive environments or marine structures
20 Times the Fatigue Resistance of steel
GFRP has 20 times the fatigue resistance of steel, making GFRP more durable under cyclic loading-420, 684 cycles for GRP compare to 23,162 cycles for steel.
No Problem with Tunnel construction
GFRP’s non-conductive and corrosion-resistant properties make it well-stuited for tunnel construction, where such characteristics are crucial.
GFRP & TMT Bars
Can be used together in construction.
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