• Home
• Solutions to Building Problems
  • Crack Repair
  • Masonry Stitching
  • Micro Repellent
  • Surface Membrane
  • Timber Repair
  • Methods of repairing splits and fissures
• Product Types
  • Timber Engineering
  • Pultruded products
  • Masonry & Concrete repair
  • Adhesive Primers & Bonding Aids
  • Coatings
  • Ancillaries
  • Special equipment
• Case Studies
• Training
  • Training Courses
  • Demo- Health & Safety
  • Demo- Mixing RSA
  • Demo- Mixing TG6
  • Demo- Mixing TM3
• Health & Safety
• Recommended Contractors
• Contact us
  • Contact us
  • Call me back
• Links
  
  

Case Studies --> Research & Development

Strength Testing of Adhesives for Timber Engineering
Adhesives for timber engineering require characteristics that enable them to be used for new component work, which is part-prepared in the factory and completed by on-site installation and refurbishment work, which is generally entirely within the confines of an existing structure.
Products fall into 4 basic categories: Free-flowing consolidation liquid Thixotropic gels Structural grouts Lightweight pliable mortars which, when cured, can be shaped with woodworking tools such as chisels and saw
Examples of each of these in the Rotafix® range are: Consolidating resin (code no. 3116) Timberset (code no.3554 and 3558) TG6 Structural Grout (code nos. 3480 and 3483) TM3 Moulding Mortar (code no.3420)
Rotafix are working closely with a number of English and European test houses and academic institutions, designing test procedures which will correctly evaluate the performance of timber adhesives. In particular, their ability to bond to both dry and wet hardwoods and softwoods and the mode of failure of joints consisting of timber and other adherents such as carbon, glass fibre and metal plates and rods.
Various test procedures are indicated in the photographs. Rotafix are the UK representatives on the CEN TC193 WG11 Committee whose remit is to provide standard test procedures for adhesives for on-site assembly or restoration of timber structures.
Testing apparatus for examining the qualities of the timber grout adhesive and its performance with timber and metal shear connectors.	Bench examination of mode of failure. Note the plug of timber and the timber set adhesive adhering to the damaged timber.		Sample 5 at the point of explosive failure. Product Rotafix Structural Adhesive. Note the plug of timber around the 5mm diameter epoxy glass rods.
Tensile test carried out to determine the ability of the adhesive bond between epoxy glass fibre rods embedded into 200 year old oak purlins, the purlins acting as the gripping mechanism with bond lengths of 200mm in the upper purlin and 300mm in the lower.		Typical mode of failure exhibited by tensile test where multi-strands of epoxy glass fibre are installed in a hole drilled into end grain timber bonded with Rotafix Structural Adhesive adhesive. With correct adhesive rod combination results in cohesive failure of the timber rather than de-bond failure.