GFRP is a better option than traditional galvanized steel in high risk environments such as subsea tunnels or where groundwater has a high chloride content.
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HEALTH & SAFETY
Safety and occupational health are rightly at the forefront of our work. Anyone who has lifted a steel rockbolt knows how heavy they are. There is still a lot of manual handling in bolting operations. GFRP has a much lower density (25% of steel) so using GFRP bolts reduces the potential harm from prolonged manual handling of rock bolts.
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ENVIRONMENTAL IMPACT
As we become more aware of our negative impact on the environment, there is a growing need to reduce this impact. One of the ways to do this is to use products which have inherently less impact on the environment, such as GFRP. After studying, GFRP bolts could have up to 40% less environmental impact than an equivalent twin coated steel bolt. In part this benefit arises from the lower weight of the GFRP bolts which weigh a quarter of the equivalent steel bolts. However, GFRP was better in all ten categories examined and not just in terms of embodied carbon ,What is less well known is that it also featured GFRP bolts as the permanent rock support.
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FRP Rock Bolt Test Unit | MGSL18 | NGSL20 | MGSL22 | MGSL24 | MGSL27 | |||
Rod | Surface | Uniform appearance, no bubble and flaw | ||||||
Nominal Diameter/mm | 18 | 20 | 22 | 24 | 27 | |||
Tensile load/KN | 160 | 210 | 250 | 280 | 350 | |||
Tensile Strength/MPa | 600 | 600 | 600 | 600 | 600 | |||
Shearing strength/MPa | 150 | 150 | 150 | 150 | 150 | |||
Torsion/Nm | 45 | 70 | 100 | 150 | 200 | |||
Antistatic | 3*107 | 3*107 | 3*107 | 3*107 | 3*107 | |||
  Flame Resistance |  Flaming | s | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | |
s | ≤2 | ≤2 | ≤2 | ≤2 | ≤2 | |||
 Flaming burning | s | ≤60 | ≤60 | ≤60 | ≤60 | ≤60 | ||
s | ≤12 | ≤12 | ≤12 | ≤12 | ≤12 |
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FRP bolts/Fiber reinforced plastics bolts/GFRP Anchor Rock Bolts Parameter
Unit | Hollow Rock bolt | Self-drilling Rock bolt | |||||
Diameter | mm | 12/25 | 12/28 | 32/15 | 12/25 | 12/28 | 32/15 |
External | mm | 25 | 28 | 32 | 25 | 28 | 32 |
cross section | mm^2 | 345 | 450 | 563 | 345 | 450 | 563 |
Thread distance | mm | 10 | 10 | 10 | 12.7 | 12.7 | 12.7 |
Thread direction | right | right | right | left | left | left | |
Tensile Load | kN | 230 | 300 | 380 | 250 | 330 | 400 |
Tensile strength | Mpa | 650 | 650 | 650 | 650 | 650 | 650 |
Torsion | Nm | 80 | 110 | 200 | 120 | 200 | 250 |
Shear strength | MPa | 150 | 150 | 150 | 150 | 150 | 150 |
Elongation | % | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
E-modulus | Gpa | 40 | 40 | 40 | 40 | 40 | 40 |
weight | g/m | 642 | 896 | 1156 | 642 | 896 | 1156 |
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APPLICATIONS
There are different types of GFRP bolts, such as solid GFRP bolts, Hollow GFRP bolts,GFRP Spin bolts,Self-drilling GFRP bolts, Cable GFRP bolts,Injection GFRP bolts,GFRP Bolts Mesh,GFRP rebar reinforcement,etc.
1. GRFP BOLTS is widely used in highways, bridges, airports, terminals, stations, water conservancy projects, underground engineering and other fields
2. Suitable for corrosive environments such as sewage treatment plants, chemical plants, electrolysis tanks, manhole covers, and coastal defense projects.
3. Suitable for military engineering, confidential engineering, special engineering, etc.
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Mining support
Face bolting
Soil nail
Slope stabilization
Permanent application
Temporary support
Subway tunnel
Building construction
Seawall damming
Rock supporting
foundation pit wall
Port of foundation pit
Roadway support
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Tunnel construction.
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ACCESSORIES
Mostly in Domed Plate and Nut, Swivel Plate and Nut,Flat Plate and Nut,Steel and GFRP couplers,
Diameter (mm) | Length (mm) | Pallet dimension (mm) | Standard value of tensile strength(MPa) | Ultimate load of the bolt(KN) | Bearing capacity of end connection and whorl (KN) | Bolt torque (N.m) |
16 | 1200~1800 | 120×120×6 | ≥300 | 80 | ≥50 | ≥40 |
18 | 1200~2000 | 120×120×10 | ≥300 | 100 | ≥60 | ≥40 |
20 | 1200~3000 | 140x140x8 150×150×8 | ≥300 | 120 | ≥70 | ≥40 |
22 | 1600~3000 | 150×150×10 170x 170x 10 | ≥300 | 140 | ≥80 | ≥40 |
24 | 1800~3000 | 150×150×10 | ≥300 | 160 | ≥90 | ≥40 |
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