Kastamonu University Journal of Forestry Faculty

1303-2399 1309-4181

Kastamonu University

10.17475/kastorman.625819

Isıl İşlem, Ağaç Türü ve Tutkal Çeşidinin Lamine Edilmiş Tabakalı Malzemelerde Vida Çekme Direncine Etkisi

The Effects of Heat Treatment, Wood Species and Adhesive Types on Screw Withdrawal Strength of Laminated Veneer Lumbers

Perçin

Osman

Altunok

Mustafa

09 30 2019

19 2 152 163 08 02 2018 04 11 2019

2001

Kastamonu University Journal of Forestry Faculty

Çalışmanın amacı: Bu çalışmanın amacı ısıl işlemin lamine edilmiş tabakalı malzemelerdevida çekme direncine etkisinin belirlenmesidir. Materyal ve Yöntem: Test örnekleri, 2 mm kalınlığında meşe (Quercus petreae L.), Doğu kayını (Fagus orientalis L.), sarıçam (Pinussylvestris L.) ve kavak (Populusnigra L.) kaplamalarından, 10 katmanlı olarak, çift bileşenlipolivinilasetat (PVAc-D4), melamin formaldehit (MF) ve poliüretan tutkallarıile lamine edilerek hazırlanmış ve sonra ısıl işlem uygulanmıştır. Testörneklerine 185 ve 212 °C’de 2 saat ısıl işlem uygulanmıştır. Sonuçlar:Sonuç olarak ağaç türüne göre en yüksek vida çekme direnci Doğu kayınında,tutkal türüne göre ise MF tutkalında belirlenmiştir. Vida çekme direnci ısılişlem sıcaklığının artması ile azalmıştır. Ağaç malzeme, tutkal türü ve ısılişlem sıcaklığı etkileşimine göre en yüksek vida çekme direnci MF tutkalı ilelamine edilen kontrol kayın örneklerde, en düşük ise PU tutkalı ile lamineedildikten sonra 212 °C’de ısıl işlem uygulanan kavak örneklerdebelirlenmiştir. Ayrıca ısıl işlem uygulamasından kaynaklanan en düşük vidaçekme direci MF tutkalı ile lamine edilen meşe örneklerde tespit edilmiştir.Araştırma Vurguları: Vida çekme direnci ağaç türü, yoğunluğu, ısıl işlem sıcaklığı vetutkal türü ile doğrudan ilişkilidir.

Aim of study: The objective of this study was to evaluate the effects of heattreatment temperature on the screw withdrawal strength on laminated veneerlumbers (LVL).Material and Methods: The LVL samples were prepared in the form of ten layers that 2 mmthickness from the European oak (Quercuspetreae L.), Oriental beech (Fagusorientalis L.), scotch pine (Pinussylvestris L.) and poplar (Populus nigra L.) veneers bonded withtwo-component polyvinyl acetate (PVAc-D4), melamine formaldehyde (MF) andpolyurethane (PU) adhesives and then heat treatment was applied to the preparedsamples. The test samples were subjected to heat treatment at 185 and 212 °Cfor 2h. Main Results: Consequently, according to wood type, the highest screw withdrawalstrength was determined in Oriental beech, with respect to the adhesive type inMF adhesive. The screw withdrawal strength of samples was decreased withincreasing treatment temperature. In the interaction of the wood materials,type of adhesive and treatment temperature, it was the highest in control beechsamples bonded with MF and the lowest in poplar samples bonded with PU whichheat-treated at 212°C. It was also observed that the lowest strength loss dueto the treatment temperature was found in oak samples and in MF adhesive. Research highlights: Screw withdrawal strengths were directly related to wood type anddensity, heat treatment temperature and adhesive type.

Heat Treatment Screw Withdrawal Strength Laminated Veneer Lumber Adhesive

Isıl İşlem Vida Çekme Direnci Lamine Edilmiş Tabakalı Malzemele Tutkal

TUBITAK

TOVAG Project Number: 110O020.

ASTM D 1761. (2000). Standard methods of testing mechanical fastener in wood, nail, staple or screw withdrawal test. ASTM Standards, West Conshohocken, PA.

Aytin, A., Korkut, S., As, N., Ünsal, Ö. & Gündüz, G. (2015). Effect of heat treatment of wild cherry wood on abrasion resistance and withdrawal capacity of screws. Drvna Industrija, 66(4), 297-303.

Bal, B.C. & Efe, F.T. (2015). The effect of reinforcement with glass fiber fabric on some screw strength of laminated veneer lumber. Düzce University, Journal of Forestry, 11(2), 40-47.

Bekhta, P. & Niemz, P. (2003). Effect of high-temperature on the change in color, dimensional stability and mechanical properties of spruce wood. Holzforschung, 57, 539-546.

Boonstra, M. (2008). A two-stage thermal modification of wood. Ph.D. Thesis, Ghent University, Belgium and Université Henry Poincaré - Nancy, France. Budakçı, M., Pelit, H., Sönmez, A. & Korkmaz, M. (2016). The effect of densification and heat-post treatment on hardness and morphological of wood materials. BioResources, 11(3), 7822-7838.

Burdurlu, E., Kılıç, M., Ilce, A.C. & Uzunkavak, O. (2007). The effects of ply organization and loading direction on bending strength and modulus of elasticity in laminated veneer lumber (LVL) obtained from beech (Fagus orientalis L.) and lombardy poplar (Populus nigra L.). Construction and Building Materials, 21(8), 1720-1725. Celebi, G. & Kilic, M. (2007). Nail and screw withdrawal strength of laminated veneer lumber made up hardwood and softwood layers. Construction and Building Materials, 21(4), 894-900.

Clauß, S., Joscak, M. & Niemz, P. (2011). Thermal stability of glued wood joints measured by shear tests. Eur. J. Wood Prod., 69(1), 101-111.

Çağatay, K., Efe, H., Burdurlu, E. & Kesik, H.İ. (2012). Determination of screw holding strength of some wood materials. Kastamonu University, Journal of Forestry Faculty, 12(2), 321-328.

Çolak, S., Aydın, İ., Demırkır, C. & Çolakoğlu, G. (2004). Some technological properties of laminated veneer lumber manufactured from pine (Pinus sylvestris L.) veneers with Melamine added - UF resins. Turkish Journal of Agriculture and Forestry, 28(2), 109-113.

Çolakoglu, G., Colak, S., Aydın, I., Yıldız, U.C. & Yıldız, S. (2003). Effect of boric acid treatment on mechanical properties of laminated beech veneer lumber. Silva Fennica, 37(4), 505-510.

Eckelman, C.A. (1975). Screw holding performance in hardwoods and particleboard. Forest Products Journal, 25(6), 30-36.

Esteves, B.M. & Pereıra. H.M. (2009). Wood modification by heat treatment: A review. BioResources, 4(1), 370-404.

Finnish ThermoWood Association (2003). ThermoWood Handbook. Helsinki, Finland: Finnish ThermoWood Association.

Fengel, D. & Wegener, G. (1989). Wood chemistry, ultrastructure, reactions. Walter de Gruyter, 33, 333-335.

Gašparík, M., Barcík, Š., Boruvka, V. & Holeček, T. (2015). Impact of thermal modification of spruce wood on screw direct withdrawal load resistance. BioResources, 10(1), 1790-1802.

Gurleyen, L., Ayata, U., Esteves, B. & Cakicier, N. (2017). Effects of heat treatment on the adhesion strength, pendulum hardness, surface roughness, color and glossiness of scots pine laminated parquet with two different types of UV varnish application. Maderas. Ciencia y tecnología, 19(2), 213-224.

Güller, B. (2001). Wood Composits. Süleyman Demirel University, Turkish Journal of Forestry, A(2), 135-160.

Hillis, W.E. (1984). High temperature and chemical effects on wood stability. Wood Science and Technology, 18(4), 281-293.

Hill, C.A.S. (2006). Wood modification: chemical, thermal and other processes. Chichester, England: John Wiley & Sons, ltd.

Homan, W.J. & Jorissen, A.J.M. (2004). Wood modification developments. Heron, 49(4), 361-386.

Kariz, M., Kuzman, M. K. & Sernek, M. (2013). The effect of heat treatment on the withdrawal capacity of screws in spruce wood. BioResources, 8(3), 4340-4348.

Kaygın, B., Gündüz, G. & Aydemir, D. (2009). Some physical properties of heat-treated paulownia (Paulownia elongata) wood. Drying Technology, 27(1), 89-93.

Keskin, H. (2001). Technical properties of laminated wood material and possibility of using them in woodworking industry, Ph.D. Thesis, Gazi University, Ankara, Turkey.

Kjucukov, G. & Encev, E. (1977). The effect of screw dimensions on the withdrawal resistance in beech wood. Holztechnologie, 18(3), 149-151.

Kleiberit product catalog, (2017). https://www.kleiberit.com/en/media-library/info-sheets.html (10.04.2017).

Kocaefe, D., Poncsák, S., Tang, J. & Bouazara, M. (2010). Effect of heat treatment on the mechanical properties of North American jack pine: Thermogravimetric study. Journal of Materials Science, 45, 681-687.

Korkut, D.S. & Güller, B. (2008). The effects of heat treatment on physical properties and surface roughness of red-bud maple (Acer trautvetteri Medw.) wood. Bioresource Technology, 99(8), 2846-2851.

Korkut, D.S., Korkut, S., Bekar, I., Budakcı, M., Dilik, T. & Çakıcıer, N. (2008). The effects of heat treatment on the physical properties and surface roughness of Turkish hazel (Corylus colurna L.) wood. International Journal of Molecular Sciences, 9(9), 1772-1783.

Lam, F. (2001). Modern structural wood products. Progress in Structural Engineering and Materials, 3(3), 238-245.

Lyons, J. S. & Ahmed, M.R. (2005). Factors affecting the bond between polymer composites and wood. Journal of Reinforced Plastics and Composites, 24(4), 405-412.

Martinka, J., Kačíková, D., Rantuch, P. & Balog, K. (2016). Investigation of the influence of spruce and oak wood heat treatment upon heat release rate and propensity for fire propagation in the flashover phase. Acta Facultatis Xylologiae Zvolen, 58(1), 5-14.

Militz, H. (2002). Thermal treatment of wood: European Processes and their background. International Research Group on Wood Preservation, Document no. IRG/WP 02-40241. 33rd Annual Meeting, 12–17 May, Cardiff-Wales 4, 1–17.

Muthike, G., Muisu, F. & Githiomi, J. (2013). Withdrawal strength of nail-timber joints for kenyan grown cypress and pines. International Journal of Applied Science and Technology, 3(3), 116-121.

Özçifçi, A. (2009). The effects of pilot hole, screw types and layer thickness on the withdrawal strength of screws in laminated veneer lumber. Materials and Design, 30(7), 2355-2358.

Poncsák, S., Kocaefe, D., Bouazara, M. & Pichette, A. (2006). Effect of high temperature treatment on the mechanical properties of birch (Betula papyrifera). Wood Science and Technology, 40(8), 647-663.

Sahin Kol, H., Ozbay, G. & Altun, S. (2009). Shear strength of heat-treated tali (Erythrophleum Ivorense) and ıroko (Chlorophora Excelsa) woods, bonded with various adhesives. BioResources, 4(4), 1545-1554.

Song, W., Xu, Z., & Zhang, S. (2018). Using surface modified E-glass fiber cloths to enhance poplar laminated veneer lumber composites: Effects of modification conditions, gluing processes, hot-pressing parameters, and assembly patterns on physical-mechanical and interfacial properties. BioResources, 13(1), 597-631.

Song, W., Wei, W., Ren, C. & Zhang, S. (2017). Effect of heat treatment or alkali treatment of veneers on the mechanical properties of eucalyptus veneer/polyethylene film plywood composites. BioResources, 12(4), 8683-8703.

Taghiyari, H.R., Gholamiyan, H. & Karimi, A. (2012). Effects of heat-treatment on screw and nail withdrawal resistance of nanosilver impregnated and untreated solid woods. Current Nanoscience, 8(4), 637-642.

Taj, M.A., Najafi, S. K. & Ebrahimi, G. (2009). Withdrawal and lateral resistance of wood screw in beech, hornbeam and poplar. European Journal of Wood and Wood Products, 67(2), 135-140.

Tenorio, C., Moya, R. & Muñoz, F. J. (2011). Comparative study on physical and mechanical properties of laminated veneer lumber and plywood panels made of wood from fast-growing Gmelina arborea trees. Journal of Wood Science, 57(2), 134-139.

Tjeerdsma B.F. & Militz, H. (2005). Chemical changes in hydrothermal treated wood: FTIR analysis of combined hydrothermal and dryheat-treated wood. Holz als Roh- und Werkstoff, 63(2), 102-111.

TS 2472. (1976). Wood - Determination of density for physical and mechanical tests. Ankara, Turkey: Turkish Standards Institution.

TS EN 13446. (2005). Wood - based panels -Determination of withdrawal capacity of fasteners. Ankara, Turkey: Turkish Standards Institution.

TS EN 386. (1999). Glued laminated timber- Performance requirements and minimum production requirements. Ankara, Turkey: Turkish Standards Institution.

Varghese, P.C. (2017). Building Construction, PHI Learning Private Limited, Delhi.

Viitaniemi, P. (1997). Decay-resistant wood created in a heating process. A heat-treatment process of wood developed by VTT Building Technology yields timber products with enhanced properties. Indusrtrial Horizons, December: 22-23.

Viitaniemi, P. (2000). New properties for thermally-treated wood. Industrial Horizons. March: 9-13.

Vlosky, R.P., Smith, P.M., Blankenhorn, P.R. & Haas, M.P. (1994). Laminated veneer lumber: A United States Market Overview. Wood and Fiber Science, 26(4), 456-466.

Yildiz, S., Gezer, E.D. & Yıldız, U.C. (2006). Mechanical and chemical behavior of spruce wood modified by heat. Building and Environment, 41(12), 1762-1766.

Yildiz, U.C., Yildiz, S. & Gezer, E.D. (2005). Mechanical and chemical behavior of beech wood modified by heat. Wood and Fiber Science, 37(3), 456-461.

Yörür, H., Tor, Ö., Günay, M.N. & Birinci E. (2017). The effects of different variables on the direct screw withdrawal strength in plywood. Kastamonu University, Journal of Forestry Faculty, 17(2), 325-333.