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Tuesday, 13 September 2016

Effect of drying method as a pretreatment on CUAZ preservative impregnation in Japanese cedar logs

Published Date

Original Article
DOI: 10.1007/s10086-009-1056-y

Cite this article as: 
Momohara, I., Saito, S., Ohmura, W. et al. J Wood Sci (2009) 55: 441. doi:10.1007/s10086-009-1056-y

  • Shuetsu Saito
  • Wakako Ohmura
  • Makoto Kiguchi

  • Abstract

    Green Japanese cedar logs 2 m in length and 18 cm in diameter were dried to a mean moisture content of less than 30% by either air drying or kiln drying. Dried logs were impregnated with copper azole (CUAZ) solution according to Japanese Industrial Standard (JIS) A9002. Preservative absorption was calculated from the log weight before and after preservative impregnation. Impregnated logs were then dried in the air and cut at the center to determine preservative penetration. The penetration area was determined after visualizing the preservative with chrome azurol S. The visualized area indicated that the preservative solution penetrated into the sapwood portion of almost all the air-dried logs. However, the kiln-dried logs did not show full penetration into the sapwood portion. The visualized area of some kiln-dried sapwood showed a penetration value of less than 80%, which is the minimum requirement set by the Japanese Agricultural Standard (JAS) for sawn timber. Statistical analysis showed that penetration in the air-dried sapwood was significantly better than that in the kiln-dried sapwood. It was concluded that air drying is more favorable than kiln drying as the predrying method for CUAZ impregnation. On the other hand, preservative absorption was not affected by the drying method.


    1. 1.
      Sedjo RA, Amano M (2006) The role of forest sinks in a post-Kyoto world. Resources 162:19–22
    2. 2.
      Kobayashi N (2005) Wood resources and climate change. Proceedings of the International Symposium on Wood Science and Technology, Yokohama, 1O01
    3. 3.
      Petersen AK, Solberg B (2005) Environmental and economic impacts of substitution between wood products and alternative materials: a review of micro-level analyses from Norway and Sweden. For Policy Econ 7:249–259
    4. 4.
      Nakazawa T, Iimura Y, Imai F, Miura I (2005) Time-dependent mechanical behaviour of king-post truss highway bridge. In: Proceedings of the International Symposium on Wood Science and Technology, Yokohama, 4P44
    5. 5.
      Matsumoto Y (2003) Lovely roof garden: harmonious space created by plants and wood (in Japanese). Mokuzai Kogyo (Wood Industry) 58:547–550
    6. 6.
      Ishida H (2003) Wooden noise barrier (in Japanese). Mokuzai Kogyo (Wood Industry) 58:559–561
    7. 7.
      Sasaki T, Usuki S, Nakamura N, Nakayama Y (2008) Technical guideline on timber bridge 2005. In: Proceedings of the 10th World Conference on Timber Engineering, p 458
    8. 8.
      Kamiya F (2003) A trend in development of the wooden guardrail (in Japanese). Mokuzai Hozon 29:53–57
    9. 9.
      Zhang R, Kanemaru K, Nakazawa T, Iimura Y, Nakamura M (2005) Full scale collision tests of timber guardrail. In: Proceedings of the International Symposium on Wood Science and Technology, Yokohama, 4P45
    10. 10.
      Deroubaix G (2008) Wood protection, a tool for climate change mitigation? International Research Group on Wood Protection, Document No. 08-50257
    11. 11.
      Shibamoto T, Amemiya S, Inoue Y, Iwasaki K, Endo J, Kamiyama Y, Kanahira Y, Kurosawa M, Kurotori S, Sakamoto Y, Saito F, Nishimoto K, Haraguchi T, Hirose R, Mawatari S, Morita T, Yamano K (1985) History of wood preservation. In: History and future of wood preservation (in Japanese). Japan Wood Preserving Association, Tokyo, pp 29–110
    12. 12.
      Bellman H (1954) Praxisnahe Laboratoriums — Untersuchungen über das Eindringen von Flüssigkeiten in Holz bei der Kesseldrucktränkung. Holz als Roh- und Werkstoff 12:312–316CrossRef
    13. 13.
      Hunt GM, Garratt GA (1967) Preparation of material for treatment. In: Wood preservation. McGraw-Hill, New York, pp 127–170
    14. 14.
      Arsenault RD (1973) Conditioning methods. In: Wood deterioration and its prevention by preservative treatment, vol II. Syracuse University Press, Syracuse, pp 149–161
    15. 15.
      Ibach RE (1999) Wood preservation. In: Wood handbook. Forest Products Society, Madison, p 14-1-27
    16. 16.
      Japanese Industrial Standard A9002 (2005) Preservative treatment of wood products by pressure processes
    17. 17.
      American Wood Preservers Association (2008) General requirements for preservative treatment. AWPA Book of Standards, T1–08
    18. 18.
      Japanese Agricultural Standard for Sawn Timber (2007) Testing method for preservative penetration. Japanese Agricultural Standard Association, Tokyo
    19. 19.
      Abramoff MD, Magelhaes PJ, Ram SJ (2004) Image processing with ImageJ. Biophotonics Int 11(7):36–42
    20. 20.
      Meyer RW (1970) Influence of pit aspiration on early wood permeability of Douglas-fir. Wood Fiber 2:238–339
    21. 21.
      Fujii T, Suzuki Y, Kuroda N (1997) Bordered pit aspiration in the wood of Cryptomeria japonica in relation to air permeability. IAWA J 18:69–76
    22. 22.
      Kang W, Chung WY (2009) Liquid water diffusivity of wood from the capillary pressure-moisture relation. J Wood Sci 55:91–99CrossRef
    23. 23.
      Tschernitz JL (1991) Energy in kiln drying. In: Dry kiln operator’s manual: USDA Agricultural Handbook AH-188. Forest Products Laboratory, Madison, pp 239–256
    24. 24.
      Tsunetsugu Y, Hisada T, Arima T (2003) Environmental impact assessment of wood drying process (in Japanese). In: Proceedings of the 53th Annual Meeting of Japan Wood Research Society, Fukuoka, p 534

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