About this product
weber.tecforce aramid sheet is an aramid-fibre, uni-directional sheet for structural confinement and repair of structures. Available in two grades with Twaron® aramid fibres and compliant with Highways Agency advice note on bridge column strengthening. Recommended application with weber.tec forceEP primer and weber.tecforce EP bonding adhesive to form part of the weber.tecforce composite strengthening system.
Typical applications:
- Bridge columns
- Bridge piers
- Silos
- Towers
Features and Benefits
- Lightweight and easy to apply
- High strength to weight ratio
- Minimal applied thicknesses
- Very flexible for details and easy to mould in situ around complex shapes
- Corrosion resistant
- Two grades of carbon fibre enabling selection in design
- Impact and blast resistant
- Factory produced with consistent mechanical properties
- Small, easy-to-handle rolls allowing precise location and embedment
- Unidirectional fibres allowing utilisation of high-strength fibres
- Special widths can be manufactured for specific projects
Technical data
Preparation
Before, the application of the S&P aramid sheet, the quality of the substrate has to be checked. The surface tensile strength of the substrate has to be tested with a pull-off bond test. For load transference into the aramid sheet, the substrate needs to be sound and dust free.
Minimum surface tensile strength is 1N/mm2.
The substrate must be roughened by light grit blasting or sand blasting or grinding to remove any surface contamination and surface cement laitance. The flatness of the substrate must be checked with a straight edge, maximum deviation shall be 5 mm over a 2 metre straight edge. Any blow-holes or depressions must be filled with weber.tecEP highbuild or weber.tec EPstructural adhesive, prior to application of weber.tec force aramid sheet.
The edges of the structural member must be rounded by grinding to achieve a minimum radius of 15mm. The substrate must be cleaned of any dust and the moisture content must be less than 4%. Ensure all surfaces are clean and free from any contamination.
Application
weber.tec force EP primer
The epoxy resin primer must be mixed in accordance with the product data sheet and applied to the prepared substrate. Allow to touch-dry – normally up to 2 hours.
weber.tecforce EP bonding adhesive
The epoxy resin adhesive must be mixed in accordance with the data sheet and applied evenly to the primed substrate as a first coat.
Immediately after the adhesive is applied, the first layer of aramid sheet is applied by hand and pressed into the surface with a rubber roller and squeegee.
Another layer of adhesive is applied by brush or roller over the first layer and is pressed into the sheet with a squeegee. Additional layers are applied in the same way onto uncured, wet epoxy resin adhesive.
For multiple layers, use the wet lay-up process. Pre wet the aramid sheet with weber.tecforce EP bonding adhesive and place the wetted-out sheet onto the first coat of adhesive.
Roller and squeege into position, taking care to align the fibres correctly.
Encapsulate this layer with a second coat of weber.tecforce EPbonding adhesive.
For multiple layers, repeat the above steps.
Pre-wetting of the aramid sheet can be achieved by either:
- Manual lamination on a table protected with plastic sheeting.
- Machine lamination using the weber.tec forcelaminator, details available on request.
Allow the epoxy resin adhesive to fully cure.
Cleaning
Clean tools carefully, using weber.tec solvent 3.
Coverage / Yield
Area coverage is 30m2 per roll.
Storage and Shelf life
Store the aramid sheets in dry conditions and protect from exposure to direct sunlight.
Unlimited shelf life if stored correctly.
Health and Safety
Sheet reinforcement material.
Technical services
weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.
Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988
Sales Contact
Weber products are distributed throughout the UK through selected stockists and distributors. For UK sales enquiries and overseas projects, contact Weber's Sales office.
Sales office
Tel: (01525) 722100
Fax: (01525) 718988
More Information
Packaging
S&P aramid sheets are supplied in 100 m long rolls at 300 mm width.
Associated Weber products
weber.tecforce EP bonding adhesive
Moisture-tolerant epoxy bondingadhesive for weber.tec forcecomposite sheets
