KEco Rock bolts are widely commercialized around the world due to their excellent material properties in terms of safety,
constructability and quality.
The KEco Rock bolt is a glass fiber reinforced plastic self-screw type product consisting of solid type and hollow type products, and the solid / hollow rock bolts are superior alternative to steel rock bolts in all aspects as a result of several tests at the tunnel site. In particular, it has been widely commercialized in various countries around the world in recognition of its superiority in safety, constructability and quality.
Verified Material
· Civil engineering materials used since the 1990s after the development of GFRP in the 1950s
(40% share of the domestic rock bolt market)
· Long life of facilities and reduced resource consumption due to strong corrosion resistance
Eco-friendly Materials
· Reduce production resources by less than 45% compared to steel rebar
· CO2 emissions less 73% than production of steel rebar
Safe Materials
· 1/4 weight ratio of steel rebar address increasing worker safety
· 4 times many loads can be transported in comparison with the steel reinforcement
· Increased convenience of construction management by allowing coloring
GFRP Rock bolt Quality Standards
· 2016 Apr Established GFRP rock bolt specification by Korea Highway Corporation
· 2017 Aug Establishment of GFRP rock bolt quality standard by Korea Rail Network Authority and Ministry of Land, Infrastructure and Transport
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| Division | Unit | Quality Standards | Remarks |
|---|---|---|---|
| Tensile Strength | MPa | ≥ 850 | |
| Shear Strength | MPa | ≥ 150 | |
| Glass Fiber Content | % | ≥ 75 | |
| Minimum diameter | mm | ≥ 20 |
KEco Rock bolt / Standard Specification
· Solid Type
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| Type NO. | Outer Diameter (mm) |
Ultimate Tensile Strength (MPa) |
Shear Strength (MPa) |
Glass Fiber Content (%) |
|---|---|---|---|---|
| SS-25 | 25 | 850 | ≥ 150 | ≥ 75 |
| SS-32 | 32 | 850 | ≥ 150 | ≥ 75 |
KEco Rock bolt / Standard Specification
· Hollow Type
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| Type NO. | Outer Diameter (mm) |
Hole Diameter (mm) |
Ultimate Tensile Strength (MPa) | Shear Strength (MPa) |
Glass Fiber Content (%) |
|---|---|---|---|---|---|
| HS-25 | 25 | 12 | 850 | ≥ 150 | ≥ 75 |
| HS-27 | 27 | 12 | 850 | ≥ 150 | ≥ 75 |
| HS-32 | 32 | 15 | 850 | ≥ 150 | ≥ 75 |
KEco Rock bolt / Standard Specification
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| KEco Solid Rock Bolt | KEco Hollow Rock Bolt | |
|---|---|---|
| Materials | GFRP | GFRP |
| Nominal Diameter | D = 23.5mm | D = 27/12(Hole)mm |
| Weight (4m) | 3.88 kg | 3.88 kg |
| The tensile strength | More than 850 MPa | More than 850 MPa |
| Ultimate | 37.0 ton/unit | 32.0 ton/unit |
| Electrical conduction | none | none |
| Durability | Approximately 100 years (corrosion resistance) | Approximately 100 years (corrosion resistance) |
| Constructability |
Lightweight (4kg/4m) for easy to handle · KEco solid rock bolt can be installed by one person · KEco solid rock bolt can be installed by one person · There is almost no dropout due to its own weight when working on the end of the ceiling. · Easy to insert KEco solid rock bolt compared to steel rebar · Difficulty working in the water section |
Lightweight (4kg/4m) for easy to handle · KEco hollow rock bolt can be installed by one person · it Can be injected through a hollow hole without connecting a separate injection tube · It is possible to shorten the construction time and to fill it by 100% · Excellent effect in the work of the water section |
| Stability |
· KEco solid rock bolt can be inserted by humanpower · KEco solid rock bolt can be inserted by humanpower · it is a non-conductive product, it can be used safely even in high-moisture and high-pressure sites. |
Reduced risk factors with lightweight materials and excellent workability · Stable excavation cycle management is possible by reducing worker fatigue and increasing work efficiency · Workers can check the mortar filling status by themselves · 100% filling possible (prevention of falling accidents) · Zero safety accidents by ensuring quality and minimizing risky work |
Application Field
Due to its high load resistance and corrosion resistance,
it is used in Rock Bolt and Soil Nail construction sites
such as tunnels and pier construction based on
its high resistance to impact loads, torsion and shear strength.
