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Shvoong Home>Science>Architecture>Durability Assessment of Adhesives and Reinforcement at the FRP-Wood Interface Summary

Durability Assessment of Adhesives and Reinforcement at the FRP-Wood Interface

Article Summary   by:toffi_75     Original Authors: Gary M. Raftery; Annette M. Harte; Peter D. Rodd;
ª
 
Pultruded
glass fibre reinforced composites can be used for reinforcing low-grade wood.
In composite design, it is imperative that a successful bond is established
between the component materials. This paper describes a test program to assess
the bond quality between glass fibre reinforced polymers and spruce that
contains large juvenile wood proportions. Durability testing involved cycling
specimens five times by a vacuum-pressure-soak-drying procedure. Two pultruded
reinforcing materials were selected for the study both comprising glass fibres
aligned unidirectionally, one in a vinylester resin and the other, in an
engineered thermoplastic polyurethane. Bond tests were executed using both wood
laminating adhesives and two-part structural epoxies. The tests results show
that the bond depends not only on the adhesive in question but also the FRP
type. In general, the durability tested specimens failed at equal or lower
shear strengths than solid control specimens, ambient tested wood-wood bond
specimens or ambient tested FRP-wood bond specimens that were taken from the
same plank. Failure modes included wood failure, reinforcement failure and
adhesion failure.
Published: August 29, 2007   
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