Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Evaluation of Physico-Mechanical Properties and Durability of Larix kaempferi Wood Heat-Treated by Hot Air

고온 열기 처리에 의한 낙엽송재의 물리·역학적 성능 및 내부후성능 변화 고찰

  • Park, Yonggun (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Han, Yeonjung (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Park, Jun-Ho (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Chang, Yoon-Seong (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Yang, Sang-Yun (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Chung, Hyunwoo (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Kim, Kyungjung (With-Wood Co.) ;
  • Yeo, Hwanmyeong (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University)
  • 박용건 (서울대학교 농업생명과학대학 산림과학부) ;
  • 한연중 (서울대학교 농업생명과학대학 산림과학부) ;
  • 박준호 (서울대학교 농업생명과학대학 산림과학부) ;
  • 장윤성 (서울대학교 농업생명과학대학 산림과학부) ;
  • 양상윤 (서울대학교 농업생명과학대학 산림과학부) ;
  • 정현우 (서울대학교 농업생명과학대학 산림과학부) ;
  • 김경중 ((주)위드우드) ;
  • 여환명 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2015.01.14
  • Accepted : 2015.02.05
  • Published : 2015.05.25
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Abstract

This study was carried out to evaluate quantitatively some properties (density, equilibrium moisture content, shrinkage, water vapor adsorption, water absorptivity, compressive strength, bending strength, hardness and decay resistance) of Larix kaempferi lumber which was heat-treated by hot air and has been used commercially in Korea. Equilibrium moisture content of the heat-treated wood was decreased with increase of hydrophobicity. Dimensional stability of the wood was improved with decrease of shrinkage, water vapor adsorption and free water absorptivity. Also, with the thermo-chemical changes of wood component and lower equilibrium moisture content, decay resistance and compressive strength of heat-treated wood were increased. But, bending strength and hardness of wood were decreased.

본 연구에서는 국내에서 상업적으로 이용되고 있는 국산 낙엽송 열처리재의 여러 가지 물성(밀도, 평형함수율, 수축률, 흡습/흡수성, 종/횡압축강도, 휨강도, 경도, 내부후성능)을 정량적으로 평가하기 위하여 수행되었다. 고온처리에 의해 목재의 소수성이 증가함에 따라 평형함수율이 감소하였다. 이에 따라 수축률 및 흡습/흡수성이 감소하여 치수안정성이 개선되었고, 낮은 함수율의 영향으로 압축강도가 증가하였으며, 목재 주성분의 변화와 낮은 함수율의 영향으로 내부후성능이 개선되었다. 하지만 열처리에 의해 밀도와 휨강도 및 경도는 감소하였다.

Keywords

References

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  1. Dimensional Responses of Wood Under Cyclical Changing Temperature at Constant Relative Humidity vol.43, pp.5, 2015, https://doi.org/10.5658/WOOD.2015.43.5.539
  2. Evaluation of Physico-mechanical Properties and Durability of Larix kaempferi Wood Heat-treated by Superheated Steam vol.44, pp.5, 2016, https://doi.org/10.5658/WOOD.2016.44.5.776
  3. Comparison of Dynamic Sorption and Hygroexpansion of Wood by Different Cyclic Hygrothermal Changing Effects vol.44, pp.2, 2016, https://doi.org/10.5658/WOOD.2016.44.2.191