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Static Bending Strength Performance of Domestic Wood-Concrete Hybrid Laminated Materials

국내산 목재-콘크리트 복합적층재의 정적 휨 강도성능

  • Byeon, Jin-Woong (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University) ;
  • Cho, Young-June (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) ;
  • Park, Han-Min (Department of Environmental Materials Science, Institute of Agriculture & Life Science, Gyeongsang National University)
  • 변진웅 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 조영준 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 이제룡 (경상대학교 환경재료과학과, 농업생명과학연구원) ;
  • 박한민 (경상대학교 환경재료과학과, 농업생명과학연구원)
  • Received : 2015.08.24
  • Accepted : 2015.09.22
  • Published : 2016.01.25

Abstract

In this study, to develop the lattice materials with a low environmental load for restoring the destroyed forest, 7 types of wood-concrete hybrid laminated materials were manufactured with domestic four softwoods, three hardwoods and concrete, and the effects of density of wood species on static bending strength performances were investigated. Bending MOEs of wood-concrete hybrid laminated materials increased with increasing density of wood species on the whole, and the values were higher than that of concrete by hybrid-laminating woods on the concrete. It was found that the measure values of bending MOEs were slightly lower than the calculated values calculated using equivalent cross-section method from MOE of each laminae of hybrid laminated materials and the difference between them was less than 10%. Bending proportional limit stresses of hybrid laminated materials showed 1.2-1.6 times higher than that of concrete by hybrid-laminating. Bending strength (MOR) of hybrid laminated materials increased with the density of wood species. By hybrid-laminating, the MOR of concrete was considerably increased. Therefore, it is considered that wood-concrete hybrid laminated materials can be applied as a materials with a low environmental load and durability for ecological restoration.

이 연구에서는 환경부하가 적은 산림훼손지 생태복원용 단위격자틀을 개발하기 위하여 콘크리트와 국내산 침엽수 4종과 활엽수 3종을 각각 복합적층한 7종류의 목재-콘크리트 복합적층재를 제작하였고, 정적 휨 강도성능에 미치는 수종의 밀도의 영향을 조사하였다. 목재-콘크리트 복합적층재의 휨 탄성계수는 전반적으로 수종의 밀도에 비례하여 증가하였고, 대부분 콘크리트에 비해 높은 휨 탄성계수를 나타내어 복합적층에 의한 밀도감소와 탄성계수향상의 효과가 나타났다. 휨 탄성계수 실측치는 각 라미나의 탄성계수로부터 등가단면법을 이용하여 계산한 예측치보다 약간 낮은 값을 나타내었고, 그 차이는 10% 미만인 것이 확인되었다. 목재-콘크리트 복합적층재의 휨 비례한도 응력은 콘크리트보다 1.2-1.6배의 높은 값을 나타내었다. 목재-콘크리트 복합적층재의 휨 강도는 전반적으로 수종의 밀도에 비례하여 증가하였고, 복합적층에 의해 콘크리트의 그것보다 현저한 강도향상을 나타내어 목재-콘크리트 복합적층재는 환경부하가 적으면서 내구성을 지닌 생태복원용 재료로 응용가능 할 것으로 판단된다.

Keywords

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  1. Bending Creep Performance of Domestic Wood-Concrete Hybrid Laminated Materials vol.44, pp.1, 2016, https://doi.org/10.5658/WOOD.2016.44.1.57