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Influence of wood properties and bonding parameters on bond durability of European Beech (Fagus sylvatica L.) glulams

Annals of Forest Science volume 67, page 601 (2010)Cite this article

Abstract

  • • Considerable progress has been made recently to promote glue-laminated beams of European beech (Fagus sylvatica L.) for load-bearing structures in engineering. However, further investigations into the bond durability are required. The objective of the present study was to analyse material and manufacturing factors and their combination to improve the resistance in delamination tests as required for the use in building service class 1.

  • • In the experimental work, the influence of selected wood properties, manufacturing conditions, and the effect of a hydroxy-methylated resorcinol primer on the delamination resistance of beech glulams bonded under laboratory and industrial conditions with a melamine-urea-formaldehyde adhesive were investigated.

  • • The highest delamination resistance of the laboratory samples was achieved with the smallest lamellae thicknesses of 29 mm. A closed assembly time of more than 30 min and the use of the primer further enhanced the bond durability. Higher delamination rates observed in glulams manufactured industrially were related to the relatively thick (38 mm) and often twisted beech lamellae used.

  • • The results suggested that bond durability required for service class 1 can be attained by restricting lamella thickness in beech glulam to a maximum of 30 mm and by using a minimum closed assembly time of 40 min.

References

  • Aicher S. and Ohnesorge D., 2009. Shear strength of glued laminated timber made from European Beech timber. Eur. J. Wood Prod. DOI 10.1007/s00107-009-0399-9 (in press).

  • Aicher S. and Reinhardt H.W., 2007. Delaminierungseigenschaften und Scherfestigkeiten von verklebten rotkernigen Buchenholzlamellen. Holz Roh. Werkst. 65: 125–136.

    Article  CAS  Google Scholar 

  • Aicher S., Höfflin L., and Behrens W., 2001. A study on tension strength of finger joints in beech timber laminations. Otto-Graf-J. 12: 169–186.

    Google Scholar 

  • Blaß H.J., Denzer J., Freese M., Glos P., and Linsenmann P., 2005. Biegefestigkeit von Brettschichtholz aus Buche. Forschungsbericht der Versuchsanstalt für Stahl, Holz und Steine, Abteilung Ingenieurholzbau. Universität TH Karlsruhe.

  • Christiansen A.W., 2005. Chemical and mechanical aspects of HMR primer in relationship to wood bonding For. Prod. J. 55: 73–78.

    CAS  Google Scholar 

  • Christiansen A.W., Vick C.B., and Okkonen E., 2003. Development of a novolak-based hydroxmethylated resorcinol coupling agent for wood adhesives. For. Prod. J. 53: 32–38.

    CAS  Google Scholar 

  • DIBt, 2009. Allgemeine Bauaufsichtliche Zulassung für Brettschichtholz aus Buche und Buche-Hybridträger. Zulassungsnummer: Z-9.1-679 Antragsteller: Studiengemeinschaft Holzleimbau e.V.

  • Eisenheld L. and Gardner D.J., 2005. Developing an industrial friendly process for hydroxymethyl resorcinol (HMR) priming of wood using a novolak-based HMR. Forest Prod. J. 55: 61–66.

    CAS  Google Scholar 

  • Frihart C.R., 2005. Adhesive bonding and performance testing of bonded wood products. J. ASTM Int. 2 (7).

  • Frihart C.R., 2009. Adhesive groups and how they relate to the durability of bonded wood. J. Adhes. Sci. Technol. 23: 601–617.

    Article  Google Scholar 

  • Frühwald A., Ressel J.B., and Bernasconi A., 2003. Hochwertiges Brettschichtholz aus Buchenholz. Bundesforschungsanstalt für Forst- und Holzwirtschaft Hamburg. Abschlussbericht: 181.

  • Gehri E., 1980. Möglichkeiten des Einsatzes von Buchenholz für Tragkonstruktionen. Schweiz. Bauwirtsch. 56: 17–21.

    Google Scholar 

  • Henning M., 2007. Verklebungsversuche von Rotbuche (Fagus sylvatica L.) — Untersuchung der Klebefugenfestigkeit von unterschiedlich behandelten Rotbuchenlamellen. Diplomarbeit am Institut für Forstbenutzung und Forstliche Arbeitswissenschaften der Fakultät für Forst- und Umweltwissenschaften der Albert-Ludwigs-Universität Freiburg i. Br.

  • Hofferber B.M., Kolodka E., Brandon R., Moon R.J., and Frihart Ch.R., 2006. Effects of swelling forces on the durability of wood adhesive bonds. Adhesion Society. In: Proc. meet. 29: 187–189. Jacksonville, Florida.

    Google Scholar 

  • Lindman H.R., 1974. Analysis of variance in complex experimental designs. W.H. Freeman & Co, San Francisco.

    Google Scholar 

  • Lopez-Suevos F. and Richter K., 2009. Hydroxymethylated resorcinol (HMR) and Novolak-based HMR (n-HMR) primers to enhance bond durability of Eucalyptus globulus glulams. J. Adhes. Sci. Technol 23: 1925–1937.

    Article  CAS  Google Scholar 

  • Molinski W. and Raczkowski J., 1988. Mechanical stresses generated by water adsorption in wood and their determination by tension creep measurements. Wood Sci. Technol. 22: 193–198.

    Article  CAS  Google Scholar 

  • Ohnesorge D., Richter K., and Seeling U., 2006. Glueability of Beech wood containing red heartwood. Proc. 5th Int. Symp. Wood Structure and Properties, Sliac — Sielnica, Slovakia, pp. 471–474.

  • Ohnesorge D., Richter K., Becker G., and Aicher S., 2008. Adhesion behaviour of glued laminated timber from European Beech. Proceedings Final Conference COST E34 “Bonding of Timber — Enhancing bond line performance”, Sopron, Hungary.

  • Pöhler E., Klingner R., and Künniger T., 2006. Beech (Fagus sylvatica L.) — Technological properties, adhesion behaviour and colour stability with and without coatings of the red heartwood. Ann. For. Sci. 63: 129–137.

    Article  Google Scholar 

  • Richter K., 1999. Feuchtebeständige Verklebung von Brettschichtholz durch den Einsatz eines Haftvermittlers. In: 5. Internationales Holzbau-Forum -IHF-, Holz, der universelle Verbundpartner. Congress-Zentrum Garmisch-Partenkirchen, 10 S.

  • Sun N. and Frazier C.E., 2005. Probing the hydroxymethylated resorcinol coupling mechanism with stress relaxation. Wood Fiber Sci. 37: 673–681.

    CAS  Google Scholar 

  • Türmerleim, 2005. Technisches Merkblatt BASF Kauramin® Leim 683 flüssig mit Kauramin® Härter 688 flüssig im Holzleimbau. Türmerleim GmbH, Ludwigshafen.

    Google Scholar 

  • Vick C.B., 1996. Hydroxymethylated resorcinol coupling agent for enhanced adhesion of epoxy and other thermosetting adhesives to wood. In: Proc. Wood Adhes. 1995, Symp. Forest Prod. Soc., Madison, WI, pp. 47–55.

    Google Scholar 

  • Vick C.B., 1997. Enhanced adhesion of melamine-urea and melamine adhesives to CCA-treated Southern Pine Lumber. For. Prod. J. 47: 83–87.

    CAS  Google Scholar 

  • Vick C.B., 1999. Adhesive Bonding of Wood Materials. In: Wood handbook — Wood as an engineering material. Chap. 9: 1–24. Gen. Tech. Rep. FPL-GTR-113. Madison, WI US Department of Agriculture, Forest Service, For. Prod. Lab. 463 p.

    Google Scholar 

  • Vick C.B., Richter K., River B.H., and Fried A.R., 1995. Hydroxymethylated resorcinol coupling agent for enhanced durability of bisphenol-A-epoxy bonds. Wood Fiber Sci. 27: 2–12.

    CAS  Google Scholar 

  • Wiegang T. and Schwaner K., 2006. Brettschichtholz aus Buche oder anderen Laubhölzern. Proceedings “Laubholzkongress” 9th March 2006, Stuttgart-Hohenheim, Germany, 98 p.

  • Zeppenfeld G. and Grunwald D., 2005. Klebstoffe in der Holz- und Möbelindustrie. DRW-Verlag. Weinbrenner GmbH & Co. KG, Leinfelden-Echterdingen, 352 p.

    Google Scholar 

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Authors and Affiliations

  1. Institute of Forest Utilization and Work Science, Albert-Ludwigs-University of Freiburg, Werthmannstr. 6, 79085, Freiburg, Germany

    Denny Ohnesorge & Gero Becker

  2. Wood Laboratory, Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, 8600, Dübendorf, Switzerland

    Klaus Richter

Authors
  1. Denny Ohnesorge
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  2. Klaus Richter
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  3. Gero Becker
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Correspondence to Denny Ohnesorge.

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Ohnesorge, D., Richter, K. & Becker, G. Influence of wood properties and bonding parameters on bond durability of European Beech (Fagus sylvatica L.) glulams. Ann. For. Sci. 67, 601 (2010). https://doi.org/10.1051/forest/2010002

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