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Surface Checking Reduction Effect of Preservative-treated Korean Larch Round-woods with Various Physical Treatments

물리적 처리에 따른 낙엽송 방부원주목의 표면할렬 방지효과

  • Pang, Sung-Jun (Department of Forest Products, National Institute of Forest Science) ;
  • Oh, Jung-Kwon (Department of Housing Environmental Design, Chonbuk National University) ;
  • Lee, Sang-Joon (Department of Forest Products, National Institute of Forest Science) ;
  • Park, Jun-Ho (Materials R&D Center, SAMSUNG SDI CO., LTD.) ;
  • Jang, Sung-Il (Department of Forest Science, College of Agriculture & Life Sciences, Seoul National University) ;
  • Lee, Jun-Jae (Department of Forest Science, College of Agriculture & Life Sciences, Seoul National University)
  • 방성준 (국립산림과학원 임산공학부) ;
  • 오정권 (전북대학교 주거환경학과) ;
  • 이상준 (국립산림과학원 임산공학부) ;
  • 박준호 (삼성SDI 소재R&D센터) ;
  • 장성일 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이전제 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2016.08.01
  • Accepted : 2017.01.05
  • Published : 2017.01.25

Abstract

In this study, the surface check reduction effect of preservative-treated Korean larch round-wood was investigated by applying three physical treatments, such as incising, kerfing, and kiln-drying. Moreover, the possibility of long-term service life was also checked by comparing the depth of surface check and the penetration depth of preservative. A rapid gradient of wood moisture content between surface and center causes a surface check. Thus, the effect of reducing surface check was carried out at the lowest equilibrium moisture content (EMC) condition, temperature ($2^{\circ}C$), humidity (44.6%), in outdoor locations in Korea until the test specimens reach to the 8.6% EMC. As a result, the preservative-treated specimens without incising, kerfing, kiln-drying (Type C) could not ensure the long-term service life due to a large surface check. Because the surface check depth of all specimens was deeper than the penetration depth of preservative. In case of the incising treated specimens (Type I), 80% of them, the depth of surface check was not deeper than the penetration depth of preservative. However, when a kerfing was additionally treated (Type B), a possibility of happening deeper surface check than penetration depth of preservative was increased rather than Type I.

본 연구에서는 국산 낙엽송 방부원주목을 대상으로 물리적 처리(인사이징, 배할, 열기건조)에 따른 표면할렬 방지효과와 장기 사용연한 확보 가능성을 실험적으로 검토하였다. 표면할렬이 목재 내 외부의 급격한 수분경사로 인해 발생하기 때문에 본 연구에서는 국내 최저 평형함수율 조건[온도($2^{\circ}C$), 습도(44.6%)]에서 시험편이 평형함수율(8.6%)에 도달할 때까지 실험을 진행하였다. 물리적 처리에 따른 표면할렬 방지효과를 검토한 결과, 무처리 시험편(Type C)의 경우, 모든 시험편에서 약제 침투 깊이보다 깊은 할렬이 발생하여 장기 내부후성을 확보할 수 없는 것으로 나타났다. 한편, 약제침투도 개선을 위해 사용하는 인사이징 처리만으로도 시험편의 80%에서 약제침투깊이보다 깊은 표면할렬을 방지하는 효과가 있었다. 그러나 국내에서 할렬을 방지하고자 사용하는 배할 처리는 인사이징 처리에 비하여 약제 침투깊이보다 깊은 표면할렬을 야기하였다.

Keywords

References

  1. British Standard (BS) 8417. 2011. Preservation of wood. Code of Practice.
  2. Eslyn, W.E. 1970. Utility pole decay. Wood Science and Technology 4(2): 97-103. https://doi.org/10.1007/BF00365296
  3. Evans, P.D., Urban, K., Chowdhury, M.J.A. 2008. Surface checking of wood is increased by photodegradation caused by ultraviolet and visible light. Wood Science and Technology 42(3): 251-265. https://doi.org/10.1007/s00226-007-0175-0
  4. Freeman, M.H., Crawford, D.M., Lebow, P.K., Brient, J.A. 2005. A comparison of wood preservatives in posts in southern mississippi : results from a half-decade of testing. Proceedings, American Wood-Preservers' Association: 136-143.
  5. Helsing, G., Graham, R.D. 1976. Saw Kerfs Reduce Checking and Prevent Internal Decay in Pressure-treated Douglas-fir Poles. Holzforschung-International Journal of the Biology, Chemistry, Physics and Technology of Wood 30(6): 184-186.
  6. Kang, S.-M., Kim, G.-H., Paik, K-H. 1995. Treatment characteristics of Japanese larch heartwood with CCA or CCFZ and improving its CCA treatability by incising techniques. Mokchae Konghak 23(4): 60-66.
  7. Kang, S.-M., Paik, K-H., Kim, G.-H. 1997. Studies on improving preservative treatability of Japanese larch heartwood by presteaming. Mokchae Konghak 25(1): 15-22.
  8. Kim, Y.-S., Hong, S.-I., Yoon, J.-H. 2006. Effects of post individualities on treatability of small diameter Japanese larch (Larix leptolepis) with ACQ and CCA. Mokchae Konghak 34(1): 52-60.
  9. Korea Forestry Promotion Institute (Kofpi). 2012. Standard test methods for wood products.
  10. National Institute of Forest Science (NIFoS) notification No. 2006-6. 2006. Standard and specification of wood products.
  11. National Institute of Forest Science (NIFoS) notification No. 2016-2. 2016. Standard and specification of wood products.
  12. Lee, C.-J., Lee, N.-H., Oh, S.-W. 2016. Effects of the knife-incising and kerfing pretreatment on moisture content and surface check occurrence of douglas-fir heavy timber. The Korean Wood Science and Technology 44(3): 302-314. https://doi.org/10.5658/WOOD.2016.44.3.302
  13. Lee, J.-S., Yoon, S.-M. 2002. Effects of polyethylene glycol treatment for improvement of preservative penetration and prevention of drying check of preservative treated round post. Mokchae Konghak 30(4): 27-32.
  14. Pang, S.-J., Hong, J.-P., Lee, J.-J., Oh, J.-K. 2015. Service Life Estimation of ACQ-treated Wood Based on Biodeterioration Resistance. The Korean Wood Science and Technology 43(5): 641-651. https://doi.org/10.5658/WOOD.2015.43.5.641
  15. Pang, S.-J., Oh, J.-K., Hong, J.-P., Lee, S.-J., Lee, J.-J. 2017. Effect of incising on the long-term biodeterioration resistance of alkaline copper quaternary (ACQ) treated wood. European Journal of Wood and Wood Products (in print).
  16. Perrin, P.W. 1978. Review of Incising and its effects on strength and preservative treatment of wood. Forest Products Journal 28(9): 27-33.
  17. Ra, J.-B. 2014. Determination of equilibrium moisture content of outdoor woods by using Hailwood-Horrobin Equation in Korea. The Korean Wood Science and Technology 42(6): 653-658. https://doi.org/10.5658/WOOD.2014.42.6.653
  18. Rowell, R.M., Feist, W.C., Ellis, W.D. 1981. Weathering of chemically modified southern pine. Wood Science 13(4): 202-208.
  19. Stamm, A.J. 1965. Modification of wood for improved finishing. Official Digest. Journal of Paint Technology 37: 707-719.