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Effect of Kerfing and Incising Pretreatments on High-Temperature Drying Characteristics of Cedar and Larch Boxed-Heart Timbers with Less than 150 mm in Cross Section Size

배할 및 인사이징 전처리가 횡단면 크기 150 mm 이하 삼나무와 낙엽송 수심재의 고온건조특성에 미치는 영향

  • LEE, Chang-Jin (Department of Wood Science & Technology, Jeonbuk National University)
  • Received : 2020.01.09
  • Accepted : 2020.04.28
  • Published : 2020.05.25

Abstract

This study was conducted to identify the effect of kerfing and incising pretreatments on high-temperature drying characteristics of cedar and larch boxed-heart timbers with a cross section of less than 150 mm. The result showed that the pretreatments have made a significant difference regarding surface check and shrinkage. Although the kerfing was suitable as a pretreatment to reduce the occurrence of surface check, the incising was not suitable as a pretreatment since the knives of timber joined together, causing the conversion to the surface checks. The shrinkage showed a significant result that the final moisture content was reduced in the order of incising, kerfing, and kerfing-incising after the drying process based on the pretreatment condition. Twist was more affected by the grain angle than the anisotropy of the juvenile wood, and there was no effect of pretreatments.

References

  1. Amer, M., Kabouchi, B., El Alami, S., Azize, B., Rahouti, M., Famiri, A., Fidah, A. 2019. Water Sorption/Desorption Kinetics and Convective Drying of Eucalyptus globulus Wood. Journal of the Korean Wood Science and Technology 47(5): 557-566.
  2. American Society for Testing and Materials. 1968. Methods of measuring moisture content of wood (ASTM Standard D 2016). Philadelphia, United States.
  3. Erickson, H.D., Crawford, R.J. 1959. The effects of several seasoning methods on the permeability of wood to liquids. In American Wood Preservers' Association. Proceedings, 55: 210-219.
  4. Fruhwald, E. 2006. Improvement of shape stability by high-temperature treatment of Norway spruce Effects of drying at $120^{\circ}C$ with and without restraint on twist. Holz als Roh-und Werkstoff 64(1): 24-29. https://doi.org/10.1007/s00107-005-0039-y
  5. Fruhwald, E. 2007. Effects of high drying temperatures and restraint on twist of larch (Larix). Wood Material Science and Engineering 2(2): 55-65. https://doi.org/10.1080/17480270701770598
  6. Fujii, T., Suzuki, Y., Kuroda, N. 1997. Bordered pit aspiration in the wood of Cryptomeria japonica in relation to air permeability. International Association of Wood Anatomists Journal 18(1): 69-76.
  7. Han, Y., Chang, Y.S., Eom, C.D., Lee, S.M. 2019a. Moisture Content Change of Korean Red Pine Logs During Air Drying: II. Prediction of Moisture Content Change of Korean Red Pine Logs under Different Air Drying Conditions. Journal of the Korean Wood Science and Technology 47(6): 732-750.
  8. Han, Y., Eom, C.D., Lee, S.M., Park, Y. 2019b. Moisture content change of Korean red pine logs during air drying: I. Effective air drying days in major regions in Korea. Journal of the Korean Wood Science and Technology 47(6): 721-731.
  9. Hermawan, A., Fujimoto, N., Sakagami, H. 2012. Effects of high-temperature and low-humidity pretreatment on the drying properties of sugi boxed-heart timber with black-colored heartwood. Drying Technology 30(7): 780-786. https://doi.org/10.1080/07373937.2012.663433
  10. Hsu, N., Tang, R. 1974. Internal stresses in wood logs due to anisotropic shrinkage. Wood Science and Technology 7(1): 43-51.
  11. Hur, J.Y., Kang, H.Y. 1997. Measurement of longitudinal liquid permeability using pressure bomb method. Journal of the Korean Wood Science and Technology 25(3): 66-74.
  12. Hwang, K.H., Park, B.S. 2009. Effect of cross-sectional dimension on the shrinkage property of Korean red-pine wood. Journal of the Korean Wood Science and Technology 37(3): 231-238.
  13. Islam, M.N., Ando, K., Yamauchi, H., Hattori, N. 2009. Effects of species and moisture content on penetration of liquid in laser incised lumber by the passive impregnation method. European Journal of Wood and Wood Products 67(2): 129-133. https://doi.org/10.1007/s00107-008-0292-y
  14. Jee, W.K., Kim, G.H. 1996. Air Permeability of Softwoods Imported from the Russian Far East. Journal of the Korean Wood Science and Technology 24(4): 22-31.
  15. Jung, H.S., Lee, N.H., Park, J.H. 1997. The characteristics of vacuum drying heated by hot plates for the thinned logs and pillars of korean pine. Journal of the Korean Wood Science and Technology 25(4): 51-60.
  16. Kim, H., Han, Y., Park, Y., Yang, S.Y., Chung, H., Eom, C.D., Yeo, H. 2017. Finite Difference Evaluation of Moisture Profile in Boxed-heart Largecross- section Square Timber of Pinus densiflora during High Temperature Drying. Journal of the Korean Wood Science and Technology 45(6): 762-771.
  17. Kubojima, Y., Kobayashi, I., Yoshida, T., Matsumoto, H., Suzuki, Y., Tonosaki, M. 2013. Twisting force during drying of wood. European Journal of Wood and Wood Products 71(6): 689-695. https://doi.org/10.1007/s00107-013-0732-1
  18. Lee, C.J., Lee, N.H., Oh, S.W. 2016a. Effects of the knife-incising andkerfing pretreatment on moisture content and surface check occurrence of douglas-fir heavy timber. Journal of the Korean Wood Science and Technology 44(3): 302-314. https://doi.org/10.5658/WOOD.2016.44.3.302
  19. Lee, C.J., Lee, N.H., Oh, S.W. 2016b. Effects of the Knife-Incising and Longitudinal Kerfing Treatment on High-Temperature Drying Characteristics of Red Pine Square Timber. Journal of the Korean Wood Science and Technology 44(5): 677-684. https://doi.org/10.5658/WOOD.2016.44.5.677
  20. Lee, C.J., Lee, N.H., Oh, S.W. 2016c. Studies on the High-Temperature Drying Characteristics of Douglas-fir, Hemlock and Radiata Pine Square Timber. Journal of the Korean Wood Science and Technology 44(5): 726-735. https://doi.org/10.5658/WOOD.2016.44.5.726
  21. Lee, C.J., Oh, S.W., Lee, N.H., Kang, C.W. 2017. Effect of the knife-incising pretreatment on the surface checks occurrence of red pine heavy timberafter drying. European Journal of Wood and Wood Products 75(1): 143-145. https://doi.org/10.1007/s00107-016-1107-1
  22. Lee, C.J., Lee, N.H., Eom, C.D., Shin, I.H., Park, M.J., Park, J.S. 2013. Effect of end-coating around pith of heavy timbers of red pine and korean pine on high-temperature and low-humidity drying characteristics. Journal of the Korean Wood Science and Technology 41(3): 221-233. https://doi.org/10.5658/WOOD.2013.41.3.221
  23. Lee, C.J., Lee, N.H., Park, M.J., Park, J.S., Eom, C.D. 2014. Effect of reserve air-drying of korean pine heavy timbers on high-temperature and low-humidity drying characteristics. Journal of the Korean Wood Science and Technology 42(1): 49-57. https://doi.org/10.5658/WOOD.2014.42.1.49
  24. Nilsson, B., Sjödén, T., Nordebo, S., Säll, H. 2007. A method for under-bark detection of the wood grain angle radial dependence. Wood Material Science and Engineering 2(3-4): 118-129. https://doi.org/10.1080/17480270801945330
  25. Park, J.C., Kim, S.W., Ryu, J.Y., Hong, S.I. 2008. Strength Property of the incised larix (Larix kaempferi Carr.) round posts treated with CCA. Journal of the Korean Wood Science and Technology 36(3): 85-92.
  26. Park, Y., Chung, H., Kim, H., Yeo, H. 2020. Applicability of Continuous Process Using Saturated and Superheated Steam for Boxed Heart Square Timber Drying. Journal of the Korean Wood Science and Technology 48(2): 121-135.
  27. Straze, A., Kliger, R., Johansson, M., Gorisek, Z. 2011. The influence of material properties on the amount of twist of spruce wood during kiln drying. European Journal of Wood and Wood Products 69(2): 239-246. https://doi.org/10.1007/s00107-010-0422-1
  28. Suzuki K, Teduka Y, Ando K, Hattori N, Kitayawa S, Kato H, Nagao H, TanakaT. 1996. Laser incising of wood, the effect of incising density on bending strength of sugi square lumber (in Japanese). Proceedings of the 46th Annual Meeting of the Japanese Wood Research Society. Japan Wood Research Society, Kumamoto, Japan. pp.130.
  29. Winandy, J.E., Morrell, J.J. 2007. Effects of incising on lumber strength and stiffness: relationships between incision density and depth, species, and MSR grade. Wood and Fiber Science 30(2): 185-197.
  30. Yamashita, K., Hirakawa, Y., Saito, S., Nakatani, H., Ikeda, M., Ohta, M. 2014. Effect of cross-sectional dimensions on bow and surface checking of sugi (Cryptomeria japonica) boxed-heart square timber dried by conventional kiln drying. Journal of Wood Science 60(1): 1-11. https://doi.org/10.1007/s10086-013-1380-0