PRODUCT
Carbon fiber
Carbon fiber
Advanced Reinforcement Solution
Description
It is cutting edge new material for loadbearing capacity improvement and seismic retrofit, and have very strong tensile strength than steel, and have been used for repair and reinforcement of concrete structure since 1990s. Specially quake-prone countries like Japan have used carbon fibers lately and largely.
Features
  • High reinforcement with more than 10 times tensile strength than steel
  • Reinforcement with the less quantity than steel
  • Light weight : specific gravity is one-fifth of steel
  • No deterioration by external factors like water, base, acid or ultraviolet rays
  • Easy to work in small place because whole process by using hand
  • Site workability is outstanding
Technical & Physical Data
item CU-P200 CU-P300 CU-P400 CU-P600
Fiber Areal Weight (g/m2) 200 300 400 600
Design Thickness (mm) 0.11 0.167 0.22 0.33
Tensile strength (kgf/cmW) 390 590 780 900
Sheet width (mm)/length (m) 500/100 500/100 500/100 500/100
Usage
Highway bridge and railway bridge pier earthquake-proof reinforcement
Pillar, beam and wall earthquake-proof reinforcement
Highway bridge RC deck repair and reinforcement
Repair and reinforcement of beam and slab etc
Repair and reinforcement of circular-shaped structure such as tunnel and silo etc
 
Application Method

1. Surface Cleaning & Repair
Remove all contaminated area with debris, grease or oil, by grinding and repair cracks or damaged section by injecting epoxy resin (Grind the corner to have R=30mm radius).
The proper temperature in working space is between 10ºC and 35ºC.

2. Primer Application
Apply primer a couple of times on the positon of concrete surface which will attach the carbon fiber. (Standard amount of primer : 0.3kg/m2)

3. The Bent Surface Control
Apply epoxy putty with spatula to step area which waviness is over than 1mm.

4. Top Coat Resin Application (1st)
After drying primer, apply the top coat resin for adhesion evenly with a roller or a brush (standard amount : 0.5kg/m2)

5. Attaching Carbon Fiber Sheet
Attach Carbon fiber sheet on a concrete structure and rub the surface a couple of times with roller or rubber scoop toward the fiber direction. Make sure no-air pocket inside the sheet.

6. Top Coat Resin Application (2nd)
Apply top coat resin on the sheet surface and let resin be penetrated into sheet by rubbing a couple of times to the fiber direction (standard amount of resin : 0.3kg/m2). In case of adding more sheets, repeat step 4,5,6.

7. Curing
It takes one week to complete hardening of epoxy resin at 20ºC and takes two weeks at 10ºC.

8. Finishing
Finish with painting.