Product Data Sheet Show all documents

SikaWrap®-231 C

Woven unidirectional carbon fibre fabric, designed for structural strengthening applications as part of the Sika® strengthening system

SikaWrap®-231 C is a unidirectional woven carbon fibre fabric with high strength, designed for installation using the dry or wet application process.

  • Manufactured with heat-set weft fibres to keep the fabric stable
  • Multifunctional fabric for use in many different strengthening applications
  • Flexible and accommodating to different surface planes and geometry (beams, columns, chimneys, piles, walls, soffits, silos etc.)
  • Available in different widths for optimum utilisation
  • Low density for minimal additional weight
  • Extremely cost effective in comparison to traditional strengthening techniques
Product Data Sheet Show all documents

Usage

Structural strengthening of reinforced concrete, masonry, brickwork and timber elements or structures, to increase flexural and shear loading capacity for:
  • Improved seismic performance of masonry walls
  • Replacing missing steel reinforcement
  • Increasing the strength and ductility of columns
  • Increasing the loading capacity of structural elements
  • Enabling changes in use / alterations and refurbishment
  • Correcting structural design and / or construction defects
  • Increasing resistance to seismic movement
  • Improving service life and durability
  • Structural upgrading to comply with current standards
 

Advantages

  • Manufactured with heat-set weft fibres to keep the fabric stable
  • Multifunctional fabric for use in many different strengthening applications
  • Flexible and accommodating to different surface planes and geometry (beams, columns, chimneys, piles, walls, soffits, silos etc.)
  • Available in different widths for optimum utilisation
  • Low density for minimal additional weight
  • Extremely cost effective in comparison to traditional strengthening techniques

Packaging

Fabric length per roll

Fabric width

1 roll in cardboard box

≥ 100 m

500 mm 

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • USA: ACI 440.2R-08, Guide for the Design and construction of Externally Bonded FRP Systems for strengthening concrete structures, July 2008
  • UK: Concrete Society Technical Report No. 55, Design guidance for strengthening concrete structures using fibre composite material, 2012.
Product Information

Construction

Fibre orientation

0° (unidirectional)

Warp

Black carbon fibres 99 %

Weft

White thermoplastic heat-set fibres 1 %

Fibre Type

Selected high strength carbon fibres

Shelf life

24 months from date of production

Storage conditions

Store in undamaged, original sealed packaging, in dry conditions at temperatures between +5 °C and +35 °C.
Protect from direct sunlight.

Dry Fibre Density

1.80 g/cm3

Dry Fibre Thickness

0.129 mm (based on fibre content)

Area Density

235 g/m2 ±10 g/m2 (carbon fibres only)

Dry Fibre Tensile Strength

4 900 N/mm2

(ISO 10618)

Dry Fibre Modulus of Elasticity in Tension

230 000 N/mm2(ISO 10618)

Dry Fibre Elongation at Break

1.7 %

(ISO 10618)
System information

System Structure

The system build-up and configuration as described must be fully complied with and may not be changed.

Concrete substrate adhesive primer

Sikadur®-330

Impregnating / laminating resin

Sikadur®-330 or Sikadur®-300

Structural strengthening fabric

SikaWrap®-231 C

For detailed information on Sikadur®-330 or Sikadur®-300, together with the resin and fabric application details, please refer to the Sikadur®-330 or Sikadur®-300 Product Data Sheet and the relevant Method Statement.

 
Technical Information

Laminate Nominal Thickness

0.129 mm

Laminate Nominal Cross Section

129 mm2 per m width

Laminate Tensile Strength

Average

Characteristic

4 300 N/mm2

3 850 N/mm2

* modification: sample with 50 mm
Values in the longitudinal direction of the fibres
Single layer, minimum 27 samples per test series

Laminate Modulus of Elasticity in Tension

Average

Characteristic
225 kN/mm2210 kN/mm2

AverageCharacteristic

225 kN/mm2

200 kN/mm2

* modification: sample with 50 mm
Values in the longitudinal direction of the fibres
Single layer, minimum 27 samples per test series

Laminate Elongation at Break in Tension

1.91 %

(based on EN 2561 / ASTM D3039)

Tensile Resistance

Average

Characteristic

555 N/mm

497 N/mm

Tensile Stiffness

Average

Characteristic

29.0 MN/m

27.1 MN/m

29.0 kN/m per ‰ elongation

27.1 kN/m per ‰ elongation

Average

Characteristic

29.0 MN/m

25.8 MN/m

29.0 kN/m per ‰ elongation

25.8 kN/m per ‰ elongation

Application

Consumption

Consumption

Dry application with Sikadur®-330

First layer including primer layer

0.8–1.2 kg/m2

Following layers

0.7 kg/m2

Wet application with Sikadur®-300, primer Sikadur®-330

Primer layer

0.4–0.6 kg/m2

Fabric layers

0.6 kg/m2

Please also refer to the relevant Method Statement for further information.
Application steps

SUBSTRATE QUALITY

Minimum substrate tensile strength: 1.0 N/mm2 or as specified in the strengthening design.
Please also refer to the relevant Method Statement for further information.

SUBSTRATE PREPARATION

Concrete must be cleaned and prepared to achieve a laitance and contaminant free, open textured surface.
Please also refer to the relevant Method Statement for further information.

Documents