Introduce
Description
This is an advanced new material to improve seismic and load-bearing capacity, and at the same time has a higher tensile strength than steel, has been used to repair and reinforce concrete structures since the 1990s. In recent times Japan is prone to earthquakes, and is largely carbon fiber.
Characteristic
– High strength steel reinforcement with tensile strength 10 times higher than steel
Reinforcement in less quantity than steel
Light weight: density is 1/5 of steel
– Not damaged by external factors such as water, bases, acids or ultraviolet rays
– Easy to apply in small areas due to completely manual application
– Outstanding construction ease
Specifications & Physics
Data item Carbon fiber mesh 200g Carbon fiber mesh 300g
Characteristics Unit Test value Test value Test method
Tensile Strength Gpa (kgf / cm2) 4.4 (44,867.5) 4.8 (48,946.4) ASTM D3039
Tensile Strength Module Gpa (kgf / cm2) 350.2 (3,571,046) 346.5 (3,533,317) ASTM D3039
Textile
UD (one direction) UD (one direction) KS L 2522
Warp type Carbon fiber type 12K Carbon fiber 12K
Weft / Tensile force G150 1/0 G150 1/0
Proportion Warp 6,4 9.6
Weft / Tensile Strength 5 3.5
Weight g / m2 200 ± 10 300 ± 10
Mesh width mm 500 500
Mesh thickness mm 0.11 ± 0.050 0.16 ± 0.050
Application
Highway bridge and railway bridge against earthquakes
Earthquake-proof columns, beams and walls
Repair and reinforcement of reinforced concrete deck
Repair and reinforcement of beams and panels, etc.
Repair and reinforcement of circular structures such as tunnels and cellars, etc.
Construction method
Surface repair & cleaning
Remove all areas contaminated by debris, grease by grinding and repair cracks or damaged parts by epoxy resin injection (Grinding angle to radius R = 30mm).
Appropriate ambient temperature is from 10ºC to 35ºC.
Construction of the lining
Apply the primer primer several times to the place where the concrete surface will adhere to the carbon fiber.
(Standard amount of primer: 0.3kg / m2)
Curved surface control
Use epoxy putty on areas depth greater than 1mm.
Construction of surface plastic layer (first layer)
After the primer dries, roll or cover with a plastic coating to create adhesion (standard quantity: 0.5kg / m2)
Attach the carbon fiber plate
Attach the carbon fiber sheet to the concrete structure and rub the surface repeatedly with a rubber roller or table in the direction of the fiber. Make sure that there are no airbags inside the fiber sheet.
Applying the surface plastic layer (second layer)
Cover the surface of the fiberboard with plastic and allow the plastic to penetrate the fiber sheet by rubbing it repeatedly in the direction of the fiber (standard amount of plastic: 0.3 kg / m2). In the case of adding more sheets of yarn, repeat steps 4,5,6.
Maintenance
It takes 1 week for epoxy resin to fully harden at 20ºC and 2 weeks at 10ºC.
Surface finishing
Surface finishing with paint.
Vietnamese