Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Physical and Mechanical Properties of Cross Laminated Timber Using Plywood as Core Layer

합판을 코어로 사용한 교호 집성재의 물리·기계적 성질

  • Choi, Chul (Department of Bio-based Materials, Chungnam National University) ;
  • Yuk, Cho-Rong (Department of Bio-based Materials, Chungnam National University) ;
  • Yoo, Ji-Chang (Department of Bio-based Materials, Chungnam National University) ;
  • Park, Jae-Young (Department of Bio-based Materials, Chungnam National University) ;
  • Lee, Chang-Goo (Department of Bio-based Materials, Chungnam National University) ;
  • Kang, Seog-Goo (Department of Bio-based Materials, Chungnam National University)
  • 최철 (충남대학교 환경소재공학과) ;
  • 육초롱 (충남대학교 환경소재공학과) ;
  • 류지창 (충남대학교 환경소재공학과) ;
  • 박재영 (충남대학교 환경소재공학과) ;
  • 이창구 (충남대학교 환경소재공학과) ;
  • 강석구 (충남대학교 환경소재공학과)
  • Received : 2014.11.14
  • Accepted : 2014.12.15
  • Published : 2015.01.25
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Abstract

This study was performed to study physical and mechanical properties of hybrid cross laminated timber (HCLT) with plywood as core layer in order to improve its mechanical properties for wooden housing. MOE, MOR, and dimensional stability of the HCLT were determined, depending on plywood composition and lamination direction. MOR value of the HCLT was improved as much as that of the glued laminated timber, which was 59.6% stronger than that of the cross laminated timber (CLT) control group. All MOE values of the HCLT were similar to glued laminated timber structure control group regardless of plywood composition and lamination directions. The dimensional stability of the HCLT was better than those of the glued laminated timber and CLT control group, owing to the use of plywood in the core.

본 연구는 기존에 제조되었던 교호집성재의 휨강도의 단점을 보완하고 새로운 특성을 가진 교호 집성재 즉, 합판을 코어로 이용한 집성재가 가진 기계적강도의 효과를 알아보기 위해 수행되었다. 집성재와 합판의 구성 방법, 적층 방향에 따라 그 값을 비교하였으며, 그에 따른 휨강도와 탄성계수를 측정하여 분석한 결과, 중심부를 집성판과 합판을 혼합하여 구성한 합판 코어 집성재의 휨강도(MOR) 값이 59.6% 강도가 향상되어 교호집성재구조 대조군보다는 우수하고, 집성재구조 대조군과는 유사한 강도를 나타냈다. 휨탄성계수(MOE)는 합판 코어 집성재의 구조 및 적층 방향성에 상관없이 모두 집성재구조 대조군과 유사한 MOE 값을 나타냈다. 치수 안정성 실험에서는 합판을 코어에 사용한 합판코어 집성재가 합판 사용으로 인하여, 수축 팽창률 모두 집성재와 교호집성재구조 대조군에 비해서 더 안정적인 것으로 나타났다.

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References

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