Journal of the Korean Wood Science and Technology

  • 제44권1호
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  • Pages.57-66
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  • 2016
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  • 1017-0715(pISSN)
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  • 2233-7180(eISSN)
한국목재공학회 (The Korean Society of Wood Science & Technology)
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국내산 목재-콘크리트 복합적층재의 휨 크리프 성능

Bending Creep Performance of Domestic Wood-Concrete Hybrid Laminated Materials

  • 조영준 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 변진웅 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 이제룡 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 성은종 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 박한민 (경상대학교 환경재료과학과, 농업생명과학연구원)
  • Cho, Young-june (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Byeon, Jin-Woong (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Lee, Je-Ryong (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Sung, Eun-Jong (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Park, Han-Min (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University)
  • 투고 : 2015.09.15
  • 심사 : 2015.10.20
  • 발행 : 2016.01.25
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초록

이 연구에서는 환경부하가 적은 산림훼손지 생태복원재료의 개발을 목적으로, 콘크리트와 국내산 침엽수 4종, 국내산 활엽수 3종의 제재라미나를 복합적층하여, 휨 크리프 성능에 미치는 수종의 밀도의 영향을 조사하였다. 목재-콘크리트 복합적층재의 휨 크리프곡선은 수종에 관계없이 시간에 따라 크리프곡선의 우측상변이 현저히 증가하는 형태를 나타내었고, 하중부하 후 약 30분 - 1시간 이후에서는 목재 및 목질재료와 같이 거의 직선적인 거동을 나타내는 것이 확인되었다. 목재-콘크리트 복합적층재의 초기변형은 수종의 밀도의 증가에 비례하여 변형이 감소하였고, 이 값은 콘크리트의 0.9 - 1.2배의 값을 나타내었다. 목재-콘크리트 복합적층재의 크리프변형은 콘크리트의 0.4 - 0.8배의 낮은 값을 나타내어 복합적층에 의한 콘크리트의 크리프변형의 현저한 감소가 확인되었다. 목재-콘크리트 복합적층재의 상대 크리프는 8.2 - 17.0%의 범위로 복합적층에 의해 콘크리트의 그것보다 0.3 - 0.7배의 매우 낮은 값을 나타내는 것이 확인되었다. 이 결과는 목재와 콘크리트의 복합적층에 의해 기존 콘크리트재료의 크리프변형을 감소시킨 산림훼손지 생태복원재료로 응용가능성을 나타낸다.

In order to develop materials with a low environmental load for restoring the destroyed forest, seven types of wood-concrete hybrid laminated materials were manufactured with four softwoods, three hardwoods and concrete, and the effect of wood density on bending creep property was investigated. The bending creep curves showed a shape to considerably increase at the upper right side, and the curves were found to show a linear behavior beyond about 30 min - 1 hour, as behaviors of solid woods and wood-based materials. The initial compliances of wood-concrete hybrid-laminated materials decreased with an increase in the wood density, and those values showed 0.9 - 1.2 times of the concrete one. The creep compliances of hybrid laminated materials showed very low values, which were 0.4 - 0.8 times of the concrete ones. The relative creep were very low with a range from 8.2% to 17.0% range, which were 0.3 - 0.7 times of the concrete ones. These results indicate that these materials can be applied for restoring the destroyed forest to reduce creep deformation of the conventional concrete materials by hybrid-laminating concrete and woods.

키워드

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