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Öğe Deniz içi ve sahilde bekletilen emprenye edilmiş lamine ağaç malzemenin eğilme direnci(2019) Doruk, Semsettin; Perçın, Osman; Yörür, HüseyinAhşap yapı, tekne ve yapı malzemesinde, kusurlarından arındırılmış ve su itici özelliği barındıran, mukavemeti yüksek ağaç malzemelere ihtiyaç duyulmaktadır. Bu çalışma kapsamında poliüretan tutkalı ile lamine edilmiş karaçam ve doğu kayını örneklerinin Wolmanit-CB ile emprenye edilerek, 12 ay süre ile deniz içi ve sahil şartlarına maruz bırakılarak eğilme direnci üzerine etkisi incelenmiştir. Deneylerde lamine ağaç malzemeler TS EN 386’ya göre hava kurusu haldeki 5 mm kalınlığındaki papel kaplamalarından, poliüretan tutkalı ile 4 katmanlı olarak toplam 120 adet deney örneği hazırlanmıştır. Lamine üretimindeki pres basıncı, karaçam için 0,8 N/mm2, doğu kayını için 1,2 N/mm2 uygulanmıştır. Farklı (ağaç, işlem ve ortam) parametrelerin eğilme direnci ve elastikiyet modülü üzerindeki etkileri TS 2474’e göre belirlenmiştir. Farklı şartların malzeme üzerindeki etkisini belirlemek için yapılan testlerde, açık hava şartlarına maruz bırakılan emprenyeli doğu kayınında en yüksek eğilme direnci tespit edilmiştir. Wolmanit-CB emprenye uygulamasının sahilde bekletilen karaçamda %40,81, doğu kayınında %26,72, deniz içinde bekletilen karaçamda %39,23, doğu kayınında %47,42 oranında emprenyesiz örneklere göre eğilme dirençlerinde artış tespit edilmiştir. Deniz içerisine bırakılan numuneler deniz delicileri tarafından tahrip edilmiş ayrıca emprenyesiz numunelerde delik sayısı ve çapının daha fazla olduğu ve lamine tutkal hattında açılmalar olduğu görülmüştür.Öğe DETERMINATION OF THE EFFECTS OF WOOD TYPES AND IMPREGNATION PROCESS IN PERFORMANCE OF THE WINDOW FRAMES CORNER JOINTS(Slovak Forest Products Research Inst, 2013) Altinok, Mustafa; Doruk, Semsettin; Arslan, Ali Riza; Gurleyen, LeventThis study examines the effects of wood types and impregnation (procedure types and process time) in performance of window frames corner joint with double tenon. For this purpose, L corner joint type samples (number 120) were manufactured by using Scotch pine (Pinus sylvestris Lipsky), oak (Quercus petreaea Lipsky) and black locust (Robinia pseudoacacia Polyvinyl acetate based (two kompenant-D4) adhesive were used to bond tenon and mortise corner joints. The samples were impregnated by using the method of immersion for 20 and 40 min with mixture of wax / linseed oil (3 % paraffin, 10 % linseed oil, 87 % white spirit) and imersol aqua. The diagonal compression test was applied to test samples (determine performance of the window frames corner joint) according to ASTM-D 143-83 1983 standards. Finally, the highest diagonal compression performance was obtained on black locust samples (7480.016 N) with the immersol aqua impregnated for 40 min. The lowest diagonal compression performance was received on oak samples (2572.706 N) which were impregnated in white mixture of wax / linseed oil for 40 min.Öğe Determining the Effect of Synthetic-based Varnish and Impregnation on Wood's Shear Strength under Cold Climate Conditions(North Carolina State Univ Dept Wood & Paper Sci, 2021) Doruk, SemsettinGlue shear strength and wood preservatives play an important role in the longevity of engineered wood products. The effects of factors such as UV rays, humidity, and temperature on wooden materials are known. However, it is not known what effects sub-zero temperatures have on wood material and how wood preservatives play a role. This study determined the effects of synthetic based varnish and impregnation on shear strength in cold climatic conditions. Variables including glue type, ambient temperature, tree type, and process type were investigated. Wood laminate test samples were produced for this purpose, and water repellent impregnation material and synthetic-based varnish were used as wood preservatives. Experimental samples were kept in a cold air cabinet at (-15 degrees C) and (-30 degrees C) temperature for 90 days. Samples kept in different temperature conditions were subjected to a pull experiment in a parallel (//) direction to the fibers under static load. As the ambient temperature decreased, the shear strength decreased (-15 degrees C: 8,960 N/mm2 ,-30 degrees C: 8,025 N/mm2) . When the performance of wood preservation elements were examined, it was determined that the varnish process (8,875 N/mm2) and the impregnation process (8,691 N/mm2) were not statistically significant, at 12% and 10%, respectively.Öğe Diagonal Tension Performance of Impregnated Woodworking Corner Joints(Zagreb Univ, Fac Forestry, 2022) Doruk, Semsettincenter dot In this study, the effects were examined of wood species, processing types and processing time on diagonal tension performance of woodworking corner joint with double tenon and mortise. Test samples were prepared by using Scots pine (Pinus sylvestris Lipsky), sessile oak (Quercus petreae Lipsky) and black locust (Robinia pseudoacacia L.). Poly vinyl acetate (PVAc) adhesive was used to join the tenon and mortise corner joints. The samples were impregnated by using the method of immersion for 20 and 40 min with a mixture of wax / linseed oil (3 % paraffin, 10 % linseed oil, 87 % white spirit) and Imersol-Aqua. The test of diagonal compression was used to test 120 samples. In this study, the minimum strength decrease of around 68 % was obtained for Scots pine impregnated with Imersol-Aqua for 40 min and the highest strength increase of around 10 % was obtained for sessile oak samples impregnated with Imersol-Aqua for 40 min. The highest diagonal tension performance of 879.734 N center dot m was obtained for oak samples impregnated with Imersol-Aqua for 40 min., the lowest diagonal ten-sion performance of 189.111 N center dot m was obtained for Scots pine samples impregnated with Imersol-Aqua for 40 min.Öğe Effects of impregnation and heat treatment on some physical and mechanical properties of wood material(Gazi Univ, 2022) Percin, Osman; Doruk, Semsettin; Altunok, MustafaThe aim of this study was to determine some physical and mechanical properties of spruce (Picea orientalis) wood, which was impregnated with aqueous solutions of valonia (valex) (the extract of Quercus ithaburensis), pine bark powder (pinex) (Pinus brutia Ten.) and gallnut powder (galex) (Quercus infectoria Oliver) as a pre-treatment and then heat treated. Test specimens were prepared from sapwood of spruce wood and impregnated with 10% tannin solutions before heat treatment base on ASTM D 1413-76. After pre-impregnation processs, specimens subjected to heat treatment at 150 degrees C, 175 degrees C and 200 degrees C for 2 h. The effect of impregnation process and heat treatment temperature on the air-dried density, compressive strength paralell to the grain (CS), bending strength (MOR) and modulus of elasticity in bending (MOE) were analyzed. As results, impregnation solutions showed positive effects on mechanical strength in unheat-treated samples and determined that mecnaical strength loses due to heat treatment slightly limited at low temperatures. However, strength loses increased with increasing temperature. The highest strength loses were also determined in impregnated samples with galex extract and heat-treated samples at 200 degrees C.Öğe Ultraviolet Light and Natural Weathering vs. the Compression Strength of Laminated Wood(North Carolina State Univ Dept Wood & Paper Sci, 2023) Doruk, SemsettinEffects of protective measures were evaluated relative to the compression strength in the direction parallel to the grain of laminated veneer wood (LVL). For this purpose, laminated panels were prepared from Scots pine, Oriental beech, Castanea sativa, and sessile oak wood veneer by gluing them with Desmodur vinyl trie ketonol acetate (D-VTKA), polyvinyl-acetate (PVAc) dispersion D4 adhesive, resorcinol formaldehyde (RF), and melamine formaldehyde (MF). The samples were impregnated with a mixture of wax, linseed oil, and coated with a synthetic-based translucent varnish. The control samples (without the treatment described above), impregnated samples, and varnished samples were kept in the external environment for 1 y and in an ultraviolet (UV) environment for 240 h. The samples were tested to determine the air-dried density, retention amount, and compression strength. The results indicated that, in terms of outdoor conditions, the varnished proceeding provided better protection compared to the impregnated proceeding. The best result for compression strength was obtained on the Oriental beech samples with RF and MF glues. The ratio of the UV environment to represent the external environment was 89%.
