Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지

Study on Physical Properties of Domestic Species II: Sorption, Thermal, Electrical and Acoustic Properties of Pinus koraiensis and Larix kaempferi

국산재의 응용물성연구II: 잣나무 낙엽송의 수분흡착성 및 열적·전기적·음향적 성질

  • Byeon, Hee-Seop (College of Agriculture and Life Science, IALS, Gyeongsang National University) ;
  • Lee, Won-Hee (College of Agriculture and Life Science, Kyungpook National University) ;
  • Park, Byung-Soo (Forest Products Division, Korea Forestry Research Institute) ;
  • Chong, Sung-Ho (Forest Products Division, Korea Forestry Research Institute) ;
  • Kang, Ho-Yang (College of Agriculture, Chungnam National University)
  • 변희섭 (경상대학교 농업생명과학대학, 농업생명과학연구원) ;
  • 이원희 (경북대학교 농업생명과학대학) ;
  • 박병수 (국립산림과학원 임산공학부) ;
  • 정성호 (국립산림과학원 임산공학부) ;
  • 강호양 (충남대학교 농업생명과학대학)
  • Received : 2008.01.21
  • Accepted : 2008.04.01
  • Published : 2008.07.25
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Abstract

A series of the studies on the applied physical properties of domestic species have been conducted last three years. Pinus koraiensis and Larix kaempferi were two of the three species examined for the first year. Because the same apparatus and experimental procedures were used for all species, their results can be easily comparable. The experiments for sorption property were conducted with 20- and 80-mesh wood powder and resulted in their EMCs and sorption isotherms at various RH conditions. The thermal conductivity and diffusivity, and electric resistance and volumetric electric resistivity were measured with a thermal-wire device and a high electric resistance meter. The differences in the thermal and electric properties between quarter- and flat-sawn specimens were observed, which were partially attributed to their anatomical differences. An acoustic measurement system was used to evaluate dynamic MOE and internal friction. This paper provides the useful fundamental data for designing a wood structure, correcting a portable resistance-type moisture meter, and acoustic properties of wood.

주요 국산재의 여러 가지 응용물성을 매년 3수종씩, 3년에 걸쳐 조사하였다. 전보에 이어 우리나라의 침엽수 대표 수종인 잣나무 및 낙엽송을 사용하였다. 매년 동일한 장치와 실험조건으로 실험하였기 때문에 모든 수종에 대한 결과를 상호 비교할 수 있었다. 수분흡착성 실험은 목분을 이용하였으며, 넓은 범위의 상대습도조건에 따른 평형함수율과 흡착등온선을 구하였다. 열전도율과 열확산률은 열선열전도장치를, 전기의 부피저항률과 저항은 고전기저항계를 이용하여 측정하였다. 정목재와 판목재의 열적 전기적 특성차이가 관찰되었는데 이는 해부학적 차이에 의한 것으로 보인다. 음향적 성질은 음향측정시스템을 사용하여 동적탄성률, 내부마찰을 측정하였다. 본 논문의 결과들은 목재구조물 설계, 휴대용 목재수분계 보정, 음향적 성질 등에 필요한 기본 자료를 제공한다.

Keywords

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