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http://dx.doi.org/10.5658/WOOD.2015.43.2.168

Effects of Heating Temperature and Time on the Mechanical Properties of Heat-Treated Woods  

Won, Kyung-Rok (College of Agriculture & Life Science, LALS, Gyeongsang National University)
Hong, Nam-Euy (College of Agriculture & Life Science, Gyeongsang National University)
Park, Han-Min (College of Agriculture & Life Science, LALS, Gyeongsang National University)
Moon, Sun-Ok (College of Agriculture & Life Science, LALS, Gyeongsang National University)
Byeon, Hee-Seop (College of Agriculture & Life Science, LALS, Gyeongsang National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.43, no.2, 2015 , pp. 168-176 More about this Journal
Abstract
This study was performed to investigate the effects of heat treatment the on mechanical properties of two species of wood under different heating conditions including at $180^{\circ}C$ for 12 h and 24 h, and at $210^{\circ}C$ for 3 h and 6 h. Two species of wood, Pinus densiflora and Larix kaempferi, were exposed to different heat treatments to assess the effects on the volume change, bending properties in static and dynamic mode and compressive strength. The results showed heat treatment caused significant changes in mechanical properties such as the static and dynamic moduli of elasticity ($MOE_d$ and $MOE_s$), and the modulus of rupture (MOR). The volume of the wood after heat treatment decreased as the heating temperature and time were increased. The bending strength performance of the wood after heat treatment decreased as the heating temperature and time were increased. The effect of heat treatment at a high temperature on the bending MOR was greater in both species than that for a long time. However, the compressive strengths of all the heat-treated samples were higher than the control sample. Furthermore, highly significant correlations between $MOE_d$ and MOR, and $MOE_s$ and MOR were found for all heating conditions.
Keywords
heat-treated wood; Pinus densiflora; Larix kaempferi; volume; bending and compressive strength properties;
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Times Cited By KSCI : 7  (Citation Analysis)
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1 Awoyemi, L., Jones, I.P. 2011. Anatomical explanations for the changes in properties of western red cedar (Thuja plicata) wood during heat treatment. Wood Science and Technology. 45: 261-267   DOI
2 Bekir, C.B. 2014. Some physical and mechanical properties of thermally modified juvenile and mature black pine wood. European Journal of Wood and Wood Products. 72: 61-66.   DOI
3 Byeon, H.S., Park, J.H., Hwang, K.K., Park, H.M., Park, B.S., Chong, S.H. 2010. Sound absorption property of heat-treated wood at a low temperature and vacuum conditions. Journal of The Korean Wood Science and Technology. 38(2):123-129
4 Chang, Y.S., Han, Y.J., Eom, C.D., Park, J.S., Park, M.J., Choi, I.G., Yeo, H.M. 2012. Analysis of factors affecting the hygroscopic performance of thermally treated Pinus koraiensis wood. Journal of The Korean Wood Science and Technology. 40(1): 10-18   DOI
5 Eom, C.D., Han Y.J., Shin S,C., Chung, Y.J., Jung, C.S., Yeo, H.M. 2007. Study on heat treatment of red pine log. Journal of The Korean Wood Science and Technology. 35(6): 50-56.
6 Eom, C.D., Park, J.H., Han, Y.J., Shin, S.C., Chung, Y.J., Jung, C.S., Yeo, H.M., 2008. Evaluation of energy consumption in heat treatment of pine log. Journal of The Korean Wood Science and Technology. 36(6): 41-48
7 Forestry research institute Korea. 1994. Wood properties and uses of the major tree species grown in korea. 95: 138
8 Hakkou, M., Petrissens, M., Zoulalian, A., Gerardin, P. 2005. Investigation of wood wetability changes during heat treatment on the basis of chemical analysis. Polymer degradation and stability. 89(1): 1-5.   DOI   ScienceOn
9 Kim, K. M., Park, J.H., Park, B.S., Son, D.W., Park, J.S., Kim, W.S., Kim, B.N., Shim, S.R. 2009 Physical and mechanical properties of heattreated domestic cedar. Journal of The Korean Wood Science and Technology. 37(4): 330-339
10 Kocaefe, D., Poncsak, S., Tang, J. 2010. Effect of heat treatment on the mechanical properties of North American jack pine: thermogravimetric study. Journal of Materials Science. 45: 681-687   DOI
11 Kocaefe, D., Poncsak, S., Boluk, Y. 2008. Effect of thermal treatment on the chemical composition and mechanical properties of birch and aspen. Bioresources. 3(2): 517-537
12 Kocaefe, D., Shi, J.L., Yang, D.Q., Bouazara, M. 2008. Mechanical properties, dimensional stability, and mold resistance of heat-treated jack pine and aspen. Journal of Natural Products. 56: 88-93.
13 Korea forest servic. 2014. Statistical yearbook of forestry. 44: 86-88
14 Kim, K.M., Park, J.H., Park, B.S., Son, D.W., Park, J.S., Kim, W.S., Kim, B.N., Shim, S.R. 2010. Physical and mechanical properties of heat-treated domestic yellow poplar. Journal of The Korean Wood Science and Technology. 38(1):17-26.   DOI
15 Lim, H.M., Hong, S.H., Kang, H.Y. 2014. Investigation of the color change and physical properties of heat-treated Pinus koraiensis square lumbers. Journal of The Korean Wood Science and Technology. 42(1): 13-19   DOI
16 Michiel, J., Boonstra, J.A, Boke, F., Tjeerdsma, E., Kegel, V. 2007. Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents. Annals of Forest Science. 64: 679-690.   DOI
17 Nakai, T. 1984. Full size bending strength of sugi timber. Wood industry. 39(11): 42-46.
18 Poncsak, S., Kocaefe, D., Bouazara, M., Pichette, A. 2006. Effect of high temperature treatment on the mechanical properties of birch. Wood Science and Technology. 40(8): 647-663.   DOI
19 Shin, R.H., Yoon, S.H., Han, T.H., Kwon, J.H. 2009 A study on the development of living products using heat and color conversion treated woods. Forest products and wood science Journal. 20(5):457-466.
20 Rosilei, A.G., Alexandre, M.C., Joa-o Vicente, F.L., Jorge, L.M.M., Wanessa, A.S., Rafael, F.M.S. 2012. Nondestructive evaluation of heat-treated Eucalyptus grandis Hill ex Maiden wood using stress wave method. Wood Science and Technology. 46: 41-52.   DOI
21 Sivonen, H, Maunu, S.L., Sundholm, F., Jamsa, S.J., Viitaniemi, P. 2002. Magnetic resonance studies of thermally modified wood. Holzforschung. 56(6): 648-654.   DOI
22 Tjeerdsma, B.F., Boonstra, M., Pizzi, A., Tekely, H., Millitz, H. 1998. Characterisation of thermally modified wood: molecular reasons for wood performance improvement. European Journal of Wood and Wood Products. 56(3): 149-153.   DOI
23 Won, K.R., Hong, N.E., Kang, S.U., Byeon, H.S., 2013. Nondestructive evaluation of strength property for heat-treated wood using free vibration mode. Journal of Agriculture & Life Science. 47(4): 189-196.
24 Yildiz, S., Gezer, E.D., Yildiz, U.C., 2006. Mechanical and chemical behavior of spruce wood modified by heat. Building and Environment. 41(12): 1762-1766.   DOI
25 Yildiz S,C., Olakoglu, G., Yildiz, U.C., Gezer, E.D., Temiz, A. 2002. Effects of heat treatment on modulus of elasticity of beech wood. International Research Group on Wood Protection. IRG/WP: 02-40222.
26 Yoon, K.J., Eom, C.D., Park, J.H., Kim, H.Y., Choi, I.G., Lee, J.J., Yeo, H.M. 2009. Color control and durability improvement of yellow poplar (Liriodendron tulipifera) by heat treatments. Journal of The Korean Wood Science and Technology. 37(6): 487-496.