Isıl işlem görmüş cennet ağacının (Ailanthus altissima) sertlik özelliklerinin parke üretimi için değerlendirilmesi

Year 2025, Volume: 26 Issue: 3, 423 - 427, 30.09.2025

Hızır Volkan Görgün

https://doi.org/10.18182/tjf.1720425

Abstract

Yapı, palet, parke vb. gibi ahşap esaslı sanayilerin gelişmesiyle ahşabın kullanım alanı genişlemiştir. Ancak, gelişme bu endüstriler arasındaki rekabeti artırmış ve doğal olarak hammadde sağlamak için ormanlara olan baskıyı da arttırmıştır. Bu nedenle birçok firma ve bilim insanı, ilgili sanayi gereksinimlerini karşılamak amacıyla hızlı büyüyen ağaç türlerini değerlendirme ve özelliklerini iyileştirme konusunda çalışmalar yapmıştır. Isı, kimyasal gibi birçok farklı yöntemin kullanıldığı modifikasyon teknikleri denenmiştir. Bu çalışmada, hızlı büyüyen bir tür olan cennet ağacı (kokar ağaç, Ailanthus altissima), masif esaslı (masif ve lamine parkenin üst tabakasında) parke üretiminde değerlendirilmek üzere incelenmiştir. Stabilite artışı ve renk koyulaşmasını da sağlamak amacıyla 205oC sıcaklık ve 2 saat süre ile termal modifikasyon yöntemi de uygulanmış ve aynı örneklerde işlem öncesi ve sonrası Brinell sertlik değerleri ölçülmüştür. Her iki örnek grubu da bu ağaç türünün sertlik açısından parke üretim gerekliliklerini karşılama durumunun değerlendirilmesi için, TS EN 1534 (2020) standardı kullanılarak karakteristik değerlere göre sınıflandırılmıştır. Sonuçlar, tüm ısıl işlem görmüş numunelerin %90'ında, sertlik değerlerinin işlenmemiş numunelerden daha yüksek bulunduğunu göstermiştir. Isıl işlemden sonra denge nem içeriğinin azalmasının (%11-13’ten %3-4’e) sertlik değerlerini artırmış olabileceği düşünülmektedir. Ayrıca hem işlem görmüş hem de işlem görmemiş cennet ağacı örneklerinin değerleri, ilgili standartta referans olarak ve en yüksek seviyede gösterilen birçok türle benzer şekilde yüksek çıkmıştır. Sonuç olarak, bu türün istilacı özelliği kontrol altına alınabilirse, işlenmemiş ve termal olarak işlenmiş ağacının masif parke üretimi için iyi bir alternatif olabileceği düşünülmektedir.

Keywords

Brinell sertlik , İstilacı ağaç türü , Masif parke , Termal modifikasyon

Evaluation of the hardness properties of the thermally modified tree-of-heaven (Ailanthus altissima) for parquet production

Abstract

Developing wood-based industries such as structure, pallet, parquet etc., expanded the usage area of the wood. However, the development increased rivalry between these industries and naturally pressure to the forests for serving raw material. Therefore, many industries and scientist studied obtaining fast-growing tree species and increasing its properties to meet the related industry requirements. Many modification techniques with using heat, chemical treatments etc. were tried. In this study, tree-of-heaven (Ailanthus altissima) as a fast-growing species was investigated to evaluate in the solid-based (solid and upper layer of the laminate) parquet production. Thermal modification method was applied with 205oC temperature and 2 hours duration to increase its stability and darkening the colors. In the same samples, Brinell hardness were measured before and after the treatment. They were both classified related to characteristic values for evaluating the species to meet the parquet production requirements according to a standard. Results showed that hardness values of the 90% of the all thermally-treated samples were found higher than untreated samples. It’s thought that the decrement of the equilibrium moisture content (11-13% to 3-4%) after the treatment could increase the hardness values. Additionally, both values of the untreated and treated tree-of-heaven samples was at the highest level with the many species which were shown as a reference in the related standard. Consequently, if the invasive characteristic of this species can be controlled, unmodified and modified wood can be a good alternative for solid-based parquet production.

Keywords

Brinell hardness , Invasive tree species , Solid parquet , Thermal modification

Thanks

The author wants to thank the the forest industry engineer Samet Delihasanoğlu from Haşep Integrated company in Duzce, Türkiye and Prof. Dr. Öner Ünsal from İstanbul University-Cerrahpaşa for providing opportunity the thermal modification process to take place in the industrial kiln.

References

• Amer, M., Kabouchi, B., Rahouti, M., Famiri, A., Fidah, A., El Alami, S., 2021. Mechanical properties of clonal Eucalyptus wood. International Journal of Thermophysics, 42: 1-15. https://doi.org/10.1007/s10765-020-02773-x
• As, N., Dündar, T., Büyüksarı, Ü., 2016. Türkiye’de yetişen ağaç türlerinin bazı fiziko-mekanik özellikleri bakımından sınıflandırılması. Journal of the Faculty of Forestry Istanbul University, 66(2): 727-735. http://dx.doi.org/10.17099 /jffiu.93670
• Ayata, U., Gurleyen, L., Esteves, B., Gurleyen, T., Cakıcıer, N., 2017. Effect of heat treatment (ThermoWood) on some surface properties of parquet beech (Fagus orientalis Lipsky.) with different layers of UV system applied. BioResources, 12(2): 3876-3889. https://doi.org/10.15376/biores.12.2.3876-3889
• Brandner, R., Schickhofer, G., 2010. Tree-of-Heaven (Ailanthus altissima): enormous and wide potential neglected by the western civilisation. World Conference on Timber Engineering. 20-24 June, Riva del Garda, Italy, s. 1-7.
• Candan, Z., Korkut, S., Unsal, O., 2013. Effect of thermal modification by hot pressing on performance properties of paulownia wood boards. Industrial Crops and Products, 45: 461-464. https://doi.org/10.1016/j.indcrop.2012.12.024
• FCBA, 2023. Le Classement D’usage Des Parquets, FCBA (Forêt Cellulose Bois-Construction Ameublement) Institut Technologique, http://nf-parquet.fr/wp-content/uploads/2019/ 11/2-Classement-dusage-Parquets-DBu.pdf
• Görgün, H. V., Ünsal, Ö. 2023. Determination of optimum lumber drying schedule of tree of heaven grown in Türkiye. Cerne, 29: e-103254. https://doi.org/10.1590/01047760202329013254
• Gyuricsek, T., Horváth, N., Németh, R. 2014. Effect of heat treatments on selected properties of Tree-of-Heaven (Ailanthus altissima). In Iaws Plenary Meeting 2014: Eco-efficient Resource Wood with special focus on hardwoods -Sopron (Hungary)–Vienna (Austria) (p. 63).
• Kadem, E., Fakir, H., 2017. Anatomical characteristics of evergreen oak (Quercus L.) species natural distributed in Turkey. Turkish Journal of Forestry, 18(4): 275-281. https://doi.org/10.18182/tjf. 371948
• Kantay, R., Güngör, N. M., 2009. Lamella production for multi-layer parquet elements. Journal of the Faculty of Forestry Istanbul University, 59(1): 43-58.
• Kúdela, J., Mamoňová, M., 2006. Tree-of-heaven wood (Ailanthus altissima Mill.) - structure and properties. In: Wood Structure and Properties ‘06 (Ed: Kurjatko, S., Kúdela, J, Lagaňa, R.) Arbora Publishers, Zvolen, Slovakia, pp: 275-280,.
• Leitch, M. A., 2009. Hardness values for thermally treated black ash. Wood and Fiber Science, 41(4): 440-446.
• Mattos, B. D., Lourençon, T. V., Serrano, L., Labidi, J., Gatto, D.A., 2015. Chemical modification of fast-growing Eucalyptus wood. Wood Science and Technology, 49: 273-288. https://doi.org/10.1007/s00226-014-0690-8
• Miao, X., Chen, H., Lang, Q., Bi, Z., Zheng, X., Pu, J., 2014. Characterization of Ailanthus altissima veneer modified by urea-formaldehyde pre-polymer with compression drying. BioResources, 9(4): 5928-5939.https://doi.org/10.15376/ biores.9.4.5928-5939
• Milić, G., Todorović, N., Veizović, M., Popadić, R., 2023. Heating rate during thermal modification in steam atmosphere: Influence on the properties of maple and ash wood. Forests, 14(2): 189. https://doi.org/10.3390/f14020189 Militz, H., Altgen, M., 2014. Processes and properties of thermally modified wood manufactured in Europe. In: Deterioration and Protection of Sustainable Biomaterials, American Chemical Society, pp. 269-285. https://doi.org/10.1021/bk-2014-1158.ch016
• Millaniyage, K., Kotlarewski, N., Wallis, L., Taoum, A., Nolan, G., 2022. Janka hardness evaluation of plantation-grown Eucalyptus nitens for engineered flooring applications. Buildings, 12(11): 1862. https://doi.org/10.3390/buildings12111862
• Németh, R., Horváth, N., Fodor, F., Báder, M., Bak, M., 2020. Wood modification for under-utilised hardwood species. In IOP Conference Series: Earth and Environmental Science, 505(1): 012017.https://doi.org/10.1088/1755-1315/505/1/012017
• Panayotov, P., Kalmukov, K., Panayotov, M., 2011. Biological and wood properties of Ailanthus altissima (Mill.) Swingle. Forestry Ideas, 17-2 (42): 122-130.
• Suri, I. F., Purusatama, B. D., Lee, S., Kim, N., Hidayat, W., Ma'ruf, S. D., Febrianto, F., 2021. Characteristic features of the oil-heat treated woods from tropical fast growing wood species. Wood Research, 66(3): 365-378. https://doi.org/10.37763/wr.1336-4561/66.3.365378
• Swaczyna, I., Kedzierski, A., Tomusiak, A., Cichy, A., Rozanska, A., Policinska-Serwa, A., 2011. Hardness and wear resistance tests of the wood species most frequently used in flooring panels. Annals of Warsaw University of Life Sciences-SGGW. Forestry and Wood Technology, 76: 82-87.
• Szabolcs, K., Varga, D., 2021. Physical and mechanical properties of wood from invasive tree species. Maderas. Ciencia y Tecnología, 23(11): 1-8. https://doi.org/10.4067/s0718-221x2021000100411
• Tenorio, C., Moya, R., Navarro-Mora, A., 2021. Flooring characteristics of thermo-mechanical densified wood from three hardwood tropical species in Costa Rica. Maderas. Ciencia y Tecnología, 23(16): 1-12. https://doi.org/10.4067/s0718-221x 2021000100416
• TS EN 1534, 2020. Wood flooring and parquet - Determination of resistance to indentation – Test method. Turkish Standards Institute, Ankara, Türkiye.
• TS EN 13183-1, 2012. Moisture content of a piece of sawn timber – Part 1: Determination by oven dry method. Turkish Standards Institute, Ankara, Türkiye.
• TS EN 13183-2, 2002. Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method. Turkish Standards Institute, Ankara, Türkiye.
• TS EN 14354, 2017. Wood-based panels - Wood veneer floor coverings. Turkish Standards Institute, Ankara, Türkiye.
• TS ISO 13061-12, 2021. Physical and mechanical properties of wood - Test methods for small clear wood specimens - Part 12: Determination of static hardness. Turkish Standards Institute, Ankara, Türkiye.
• Vermaas, H.F., 1995. Drying eucalypts for quality: Material characteristics, pre-drying treatments, drying methods, schedules and optimisation of drying quality. South African Forestry Journal, 174(1):41-49. https://doi.org/10.1080/ 00382167.1995.9629877
• XP B53-669, 2012. Wood and parquet flooring - Use classification, Association Française de Normalisation (Afnor), France (Standard replaced by NF B53-669, 2023).