European Journal of Wood and Wood Products

, Volume 76, Issue 3, pp 833–841 | Cite as

The evaluation of panel bond quality and durability of hem-fir cross-laminated timber (CLT)

  • Jianhe Brad Wang
  • Peixing Wei
  • Zizhen Gao
  • Chunping Dai
Original
  • 98 Downloads

Abstract

To better use the second-growth wood resources in value-added applications, this work addressed the manufacturing aspects of cross-laminated timber (CLT) products from western hemlock (Tsuga heterophylla (Raf.) Sarg) and amabilis fir (Abies amabilis (Dougl.) Forbes) (or hem-fir) harvested from coastal British Columbia, Canada. Small CLT billets (nominal 610 mm × 610 mm) were made to examine CLT bond quality and durability through block shear and delamination tests. Two types of adhesives, single-component polyurethane (PUR) and emulsion polymer isocyanate (EPI) and two critical applied pressure parameters (0.28 and 0.83 MPa) were adopted to manufacture hem-fir CLT. It was found that the adhesive type and applied pressure significantly affected wood failure percentage (WFP) and delamination of hem-fir CLT. When PUR adhesive was used, CLT made at 0.83 MPa pressure yielded significantly higher WFP and lower delamination than that made at 0.28 MPa pressure. The results demonstrated that despite the fact that hem-fir lumber is not particularly specified in the current North American CLT standard, it could be used for manufacturing CLT with the required panel bond quality.

Notes

Acknowledgements

The authors would like to thank Natural Resources Canada (Canadian Forest Service) and the Province of British Columbia for their guidance and financial support for this research. This work was also supported by the natural science research general project of Jiangsu Province of China (16KJD220001), the science project of Jiangsu Vocational College of Agriculture and Forestry (2017kj04), and Ningbo major social development project entitled “Development of new green prefabricated building materials for demonstration buildings” (2017C510004). The authors thank Ciprian Pirvu, Conroy Lum, Romulo Casilla, John Hoffmann, and Gordon Chow, among others at FPInnovations, for their help in this work.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jianhe Brad Wang
    • 1
    • 2
  • Peixing Wei
    • 1
  • Zizhen Gao
    • 2
  • Chunping Dai
    • 3
  1. 1.Jiangsu Vocational College of Agriculture and ForestryJurongPeople’s Republic of China
  2. 2.Ningbo Sino-Canada Low-Carbon Technology Research Institute Co. Ltd.NinghaiPeople’s Republic of China
  3. 3.FPInnovationsVancouverCanada

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