Fibre Carbon Wrapping

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Carbon fiber reinforced polymer is a lightweight, strong and durable material that can be used to strengthen concrete structures without having to demolish and replace them. This is a cost-effective method of strengthening structures that need to carry heavier loads, or where the structure’s design is inadequate. We use a high strength, high modulus unidirectional carbon fiber fabric. It is laminated with epoxy resin adhesive to form a carbon fiber reinforced polymer lamination (CFRP) used in structural strengthening.

Application Range

  • Load Increase: Increase in loads in commercial buildings; Increase in traffic weight and volume on bridges; Installation of heavy equipment in industrial facilities; Increase of vibration in structures
  • Improve Structural Condition: Reduce deformations; Reduce stresses in existing structural elements; Limit or arrest crack propagation
  • Seismic Retrofitting: Columns wrapping reinforcement for improving ductility and shear strength; Masonry walls reinforcement for improving out-of-plane bending and in-plane shear strengths; Beam and slab reinforcement
  • Change Structural System (Structural Alterations): Removal of walls or columns; Removal of slab sections for openings
  • Aging and Damaged Structures: Aging of old deteriorated construction materials; Corrosion of steel bars in concrete; Vehicles collusion impact on structures (impact damage)
  • Design or Construction Errors: Lack of adequate well-detailed reinforcing bars; Inadequate member cross section; Substandard concrete material strength

Product Characteristic

  • Light self-weight: Allows operation in a narrow and tight spaces; Minimal impact on the normal use of the structure during construction; Adds almost no additional weight to the existing structure.
  • High strength, high modulus: Very effective in flexural strengthening in the form of straight sheets, shear strengthening in the form of closed loop wrapping, U-shaped and side bonding; Increase ductility and strength of circular columns in the form of transverse wrapping; Restoration of various complex shape structural elements.
  • Wide application range: Suitable for surface of various structural components: Beams, columns, ventilation tubes, pipes, walls, etc.; It could be used on various types of structural components and systems, e.g. concrete structures, masonry structures, wood structures, steel structures, and many other structural elements and systems.
  • Anti-corrosion: Anti-acid, alkali and other chemical corrosion and resistance to severe environments.

Application Process

1. Surface Preparing: Remove the coating of concrete surface with grinder. Polishing the Surface. If there is angular, grinder it into round.

2. Setting out: Get the concrete surface clean and keep it dry, then setting out.

3. Apply Primer: Apply primer adhesive onto the surface of the concrete.
4. Apply Putty/Leveling: Apply putty for repairing and leveling if needed.
5. Fabric Cutting: Cut carbon fiber fabric into sizes as designed.

6. Preparing the impregnation adhesive: Weight and mixing adhesive according to ratio. Stirring the adhesive until the color is even. Avoid air bubble in this process.

7.Applying Impregnation Adhesive: Apply impregnation adhesive when primer adhesive is touch dry. (If primer is not required, impregnated adhesive can be applied directly.)

8. Apply carbon fiber fabric: Apply carbon fiber fabric onto the concrete surface as designed. Leveling the surface from one end to another.

9. Check Gap or Bubble: Apply impregnation carbon fiber adhesive again. Make sure the adhesive impregnate fully into the fabric. The surface flat and no air bubble. Repeat above process from cutting carbon fiber if applying two or more layers.