Glass fiber reinforced plastic (GFRP) is a type of fiber reinforced composite material (FRP), which is made of high-performance glass fibers and a synthetic resin matrix through a specific molding process. The glass fibers used in glass fiber reinforced plastic are usually alkali-free or high-strength, and the resin matrix can be unsaturated polyester resin, vinyl ester resin, epoxy resin, etc.
1) Model: Customized
2) Product Advantages:
1. High tensile strength: The tensile strength of glass fiber reinforcement is better than that of ordinary steel bars, which is 20% higher than that of steel bars of the same specification, and has good fatigue resistance.
2. Light weight: The quality of glass fiber reinforcement is only 1/4 of the same volume of steel, and the density is between 1.5 and 1.9 (g/cm3).
3. Strong corrosion resistance: corrosion resistance of chemicals such as acid and alkali can resist the corrosion of chlorideions and low pH solutions, especially the corrosion resistance of carbon compounds and compounds.
4. Strong material binding force: The thermal expansion coefficient of glass fiber reinforcement is closer to cement than steel, because glass fiber reinforcement and concrete have stronger binding force.
5. Strong designability: The elastic modulus of the glass fiber ribs is stable, the size is stable under thermal stress, and the bending and other shapes can be heat-formed arbitrarily, and the safety performance is good. There will be no sparks when colliding with metal.
6. Strong magnetic permeability: The glass fiber reinforcement is a non-magnetic material, and it is not necessary to demagnetize the non-magnetic or electromagnetic concrete components.
7. Convenient construction: The glass fiber reinforcement can produce various standard and non-standard parts with different sections and lengths according to user requirements. Non-metallic tension bands can be used for on-site binding, which is simple to operate.
3) Usage scenarios:
(1)Rail transit(subway) :
Problem: the reinforced diaphragm wall or maintenance pile must be cut in the retaining wall of the tunnel entrance and exit. TBM can't cut the reinforced concrete structure effectively, that is, the artificial reinforcement is broken. Increase the labor intensity of workers and increase the period of tunnel excavation.
Solution: GFRP reinforcement cage can be easily cut for general machinery, especially for anti-corrosion conditions, its material performance even exceeds that of reinforcement. That is to say, GFRP reinforcement is used to replace the reinforcement in the design and construction of concrete structure. Mainly according to gb50608-2010, JGT 406-2013, etc. It reduces the safety risks of sand, mud and water gushing, reduces the construction period and reduces the comprehensive cost.
(2) Coal mining roadway
(3)Rail transit (tram)
(4) Road and Bridge:
FRP rebar are used in highway scale instead of steel bars, and bridge panel accessories are used
Features: high strength, corrosion resistance, light weight, design, convenient construction, etc. Jishuang expressway is a typical weather in Northeast China. It is necessary to solve the problem of corrosion of steel bars and damage of structures by using industrial salt to remove snow and ice. After a large number of acid ions such as chloride ions in salt and snow melting agent infiltrate into concrete with salt water, they react with iron in steel bars, accelerate the corrosion and expansion of iron, lead to peeling of protective layer, and finally lead to structural damage of bridges and roads.
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