Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Bending and Bonding Strength Performances of Larix Block-glued Glulam

낙엽송 블록접착집성재의 접착 및 휨 강도 성능

  • Lee, In-Hwan (Division of Forest Material Science & Engineering, Program of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Hong, Soon-Il (Division of Forest Material Science & Engineering, Program of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University)
  • 이인환 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공) ;
  • 홍순일 (강원대학교 산림환경과학대학 산림응용공학부 산림바이오소재공학전공)
  • Received : 2016.03.31
  • Accepted : 2016.05.17
  • Published : 2016.05.25
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Abstract

Block-glued glulam is a structural material that can be used as a construction member of a large-section wooden building, which is produced by edgewise bonding of two or more glulam beam elements. The edgewise bonding performance of the block-glued glulam was examined through delamination test and block shear strength test. According to the test results, the block-glued glulam that was manufactured with 1.5 MPa of compressive pressure after applying $500g/m^2$ of Resorcinol adhesive showed the best edgewise bonding performance. The block-glued glulam produced in a good edgewise bonding condition was compared with a control glulam with the same section modulus for bending strength performance. The modulus of elasticity (MOE) in bending was similar to that of the control glulam. The modulus of rupture (MOR) of the block-glued glulam was higher by 27% than that of the control glulam. No interfacial failure or cohesive failure were observed in the edgewise bonding layer.

2개 이상의 보부재 집성재 요소들의 측면접착으로 제작된 "블록접착집성재"는 대단면 목조건축물의 건축부재로 활용 가능한 구조용재다. 블록접착집성재의 측면은 접착제의 종류와 도포량 및 압체압력을 각기 다른 조합으로 접착하여 박리시험과 전단블록시험으로 접착성능을 검토하였다. 실험결과 레조시놀접착제 $500g/m^2$을 도포하고 압체압력 1.5 MPa의 조건으로 제작된 블록접착집성재의 측면접착성능이 가장 양호하였다. 양호한 측면접착조건으로 제작된 블록접착집성재는 동일단면계수의 대조군 집성재와 휨 강도 성능을 비교 검토하였다. 블록접착집성재의 휨 탄성계수는 대조군 집성재와 유사하였으며, 파괴계수는 대조군집성재 보다 27% 향상되었다. 할렬은 대조군집성재 보다 블록접착집성재에서 다량 발생하였으며, 블록접착집성재의 측면접착층에서 계면파괴나 응집파괴는 관찰되지 않았다.

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References

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