Technical-economical evaluation of beech plywood bonding
2014
Brozek, M., Czech Univ. of Life Sciences, Prague (Czech Republic)
The contribution contains results of bonded joints strength tests. The tests were carried out according to the modified standard CSN EN 1465 (66 8510). For bonding the beech three-ply wood of 4 mm thickness was used (according to CSN EN 636). The test samples of 100x25 mm size were cut out from a semi-product of 2500x1250 mm size in the direction of its longer side (incline 0º), in the inclined direction (incline 45º) and in the direction of its shorter side (crosswise - incline 90º). The bonding was carried out using seven different domestic as well as foreign adhesives according to the technology prescribed by the producer. All used adhesives were designated for wood bonding. At the bonding the consumption of the adhesive was determined. After curing the bonded assemblies were loaded using a universal tensile-strength testing machine up to the rupture. The rupture force and the rupture type were registered. Finally the technical-economical evaluation of the experiments was executed.
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