Product Data Sheet Show all documents

SikaWrap®-231 C

Carbon fibre, unidirectional, high strength fabric with a fibre area density of 235 g/m² designed for dry or wet application

SikaWrap®-231 C is a unidirectional woven carbon fibre fabric. The Product is made of high strength carbon fibres with an area density of 235 g/m². The fabric is designed for installation using the dry or wet application process.

  • Improves the service life of a structure
  • Manufactured with thermo-welded 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 (such as beams, columns, chimneys, piles, walls, soffits and silos)
  • Available in different widths for optimum utilisation
  • Low density for minimal additional weight
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Product Data Sheet Show all documents

Usage

SikaWrap®-231 C is used as a reinforcement fabric for externally bonded structural strengthening systems on concrete, masonry and wooden substrates. Externally bonded structural strengthening systems are used for:
  • Increasing the flexural and shear loading capacity of elements and structures
  • Enhancing the load-carrying capacity or ductility of structural members in compression
  • Replacing missing steel reinforcement
  • Structural upgrading of weak concrete elements or structures
  • Improving impact resistance
  • Passive strengthening for seismic event protection
Please note:
  • A specialist structural engineer must be consulted for any structural strengthening design calculation.
 

Advantages

  • Improves the service life of a structure
  • Manufactured with thermo-welded 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 (such as beams, columns, chimneys, piles, walls, soffits and silos)
  • Available in different widths for optimum utilisation
  • Low density for minimal additional weight

Packaging

Rolls, 300 mm wide

50 m

Rolls, 600 mm wide

50 m

Refer to the current price list for available packaging variations.

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

  • Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4

APPROVALS / STANDARDS

  • Technical Agreement, CTPC, No. 016-01/488-2022

  • Slovakia: Technical Assessment, TSUS, No. SK04-ZSV-2669

  • Test Report, Ministry of Regional Development (Ukraine), No. ЗНТ–219–2167.13-001
Product Information

Construction

Fibre orientation

0° (longitudinal, unidirectional)

Warp (longitudinal)

Black carbon fibre, 99 %

Weft (transversal)

White thermoplastic heat-set fibre, 1 %

Shelf Life

24 months from date of production

Storage Conditions

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C. Protect the Product from direct sunlight. Always refer to packaging.

Fibre Type

Selected high strength carbon fibres

Dry Fibre Thickness

0.129 mm

Area Density

(235 ± 10) g/m²

Dry Fibre Density

1.80 g/cm³

Dry Fibre Modulus of Elasticity in Tension

230 kN/mm²

(ISO 10618)

Dry Fibre Tensile Strength

4900 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 or 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 individual Product Data Sheets and the relevant Method Statement.

 
Technical Information

Laminate Nominal Thickness

0.129 mm

Laminate Nominal Cross Section

129 mm² per metre width

Laminate Tensile Strength

Mean

4100 N/mm²

5 % characteristic

3600 N/mm²

Mean

3900 N/mm²

Characteristic (ACI 440.2R)

3300 N/mm²

All values refer to the relevant design nominal thickness.

Laminate Modulus of Elasticity in Tension

Mean

230 kN/mm²

5 % characteristic

220 kN/mm²

Mean

220 kN/mm²

All values refer to the relevant design nominal thickness.

Laminate Elongation at Break in Tension

Mean

1.80 %

5 % characteristic

1.50 %

Mean

1.75 %

Characteristic (ACI 440.2R)

1.50 %

Application

Consumption

Consumption

DRY APPLICATION WITH SIKADUR®-330

First layer, including primer

0.7–1.2 kg/m²

Following layers

0.5 kg/m²

WET APPLICATION WITH SIKADUR®-300, PRIMER SIKADUR®-330

SikaWrap®-231 C

Primer

0.4–0.6 kg/m²

Fabric layers

0.6 kg/m²
Application steps

SUBSTRATE QUALITY

Tensile adhesion strength of the substrate must be a minimum of 1.0 N/mm² or as specified in the strengthening design. If necessary, verify this by applying a test area first.

Refer to the relevant SikaWrap® Method Statement for further information.

SUBSTRATE PREPARATION

Clean and prepare concrete to achieve a laitance-free, contaminant-free, open-textured surface.

Refer to the relevant SikaWrap® Method Statement for further information.

 

APPLICATION

IMPORTANT

Application by trained personnel

The application of this Product must only be carried out by an applicator that is trained or approved by Sika. The applicator must also be experienced in this type of application.

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

IMPORTANT

Do not interchange different system components

SikaWrap® fabrics are coated to ensure maximum bond and durability with the Sikadur® adhesives, impregnating and laminating resins. To maintain and ensure full system compatibility, do not interchange different system components.

  1. IMPORTANT Never fold the fabric. Cut the fabric with special scissors, a razor knife or a box-cutter knife.
  2. Apply the SikaWrap fabric using the wet or dry application process. Refer to the relevant Method Statement for details on either the impregnating or laminating procedure:

  • 850 41 02 Method Statement SikaWrap® manual dry application

  • 850 41 03 Method Statement SikaWrap® manual wet application

OVERCOATING SIKAWRAP® FABRICS

SikaWrap® fabrics can be overcoated with a cementitious overlay or other coatings for aesthetic or protective purposes. The selection of the overcoating system depends on the exposure and project-specific requirements.

For additional protection from UV light in exposed areas, use one of the following:

  • Sikagard®-550 W Elastic

  • Sikagard®-675 W ElastoColor

  • Sikagard®-680 S Betoncolor

  • Sikagard®-5500

 

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