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
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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

≥ 50 m

600 mm

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Poland: Technical Approval IBDiM Nr AT/2008-03-0336/1 „Płaskowniki. pręty, kształtki i maty kompozytowe do wzmacniania betonu o nazwie handlowej: Zestaw materiałów Sika CarboDur® do wzmacniania konstrukcji obiektów mostowych
  • 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, refer to the Sikadur®-330 or Sikadur®-300 Product Data Sheet.

 
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 Tensile Modulus of Elasticity

Average

Characteristic
225 kN/mm2210 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

1.91 %

(EN 2561)

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

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

Refer to the relevant Technical Information Manual for further information.
Application steps

SUBSTRATE QUALITY

Minimum substrate tensile strength: 1.0 N/mm2 or as specified in the strengthening design.
Refer to the relevant Technical Information Manual for further information.

SUBSTRATE PREPARATION

Concrete must be cleaned and prepared to achieve a laitance and contaminant free, open textured surface.
Refer to the relevant Technical Information Manual for further information.

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