The Influence of False Heartwood of European Beech (Fagus sylvatica L.) on Tensile Shear Strength of Lap Joints

Authors

  • Jiří Procházka Department of Wood Science and Technology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 61300 Brno, Czech Republic
  • Milan Podlena Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic
  • Jan Tippner Department of Wood Science and Technology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 61300 Brno, Czech Republic
  • Jan Vaněrek Institute of Technology of Building Materials and Components, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech Republic
  • Martin Böhm Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic

Keywords:

Beech wood, False heartwood, Lap joints, Shear strength, Polyurethane adhesive, Phenol-formaldehyde, Urea-formaldehyde

Abstract

The aim of this research was to investigate the effect of false heartwood of beech wood on the shear strength of glued joints for thermoplastic and reactoplastic adhesives for plywood production. The tensile shear strength of the lap joints was tested for four different types of adhesives according to EN 204 (2016) and EN 205 (2016). The results showed that for lap joints assembled with polyvinyl acetate, urea-formaldehyde, and phenol-formaldehyde adhesives, there was no significant difference in shear strength between beech sapwood and false heartwood. However, for joints bonded with polyurethane adhesive, the shear strength was lower for heartwood compared to the reference sapwood, particularly after exposure to water immersion.

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Published

2024-09-16

How to Cite

Procházka, J., Podlena, M., Tippner, J., Vaněrek, J., & Böhm, M. (2024). The Influence of False Heartwood of European Beech (Fagus sylvatica L.) on Tensile Shear Strength of Lap Joints. BioResources, 19(4), 8354–8367. Retrieved from https://ojs.bioresources.com/index.php/BRJ/article/view/22996

Issue

Vol. 19 No. 4 (2024)

Section

Research Article or Brief Communication