Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 308, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.125026
Keywords
Near infrared spectroscopy; Glue-laminated timber; Glulam; Delamination; Quality assurance
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Funding
- neue Holzbau AG, Lungern, Switzerland
- Henkel & Cie. AG, Sempach, Switzerland
- European Commission under the Horizon2020 Widespread-2-Teaming program [739574]
- Republic of Slovenia
- Republic of Slovenia (European Union's European Regional Development Fund)
- ARRS [IO-0035, BI-IT/18-20-007, N1-0093]
- CLICK DESIGN Delivering fingertip knowledge to enable service life performance specification of wood under the umbrella of ERA-NET Cofund ForestValue by the Ministry of Education, Science and Sport of the Republic of Slovenia [773324]
- European Union's Horizon 2020 research and innovation programme
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The study confirmed the feasibility of a portable NIR sensor for off-line determination of various wood quality aspects in glue-laminated timber production, with a focus on assessing wood moisture content. Additionally, successful demonstration was made in traceability of raw resources, automatic classification of diverse wood defects, and prediction of total delamination using a developed chemometric model. Recommendations for further system development were provided to integrate NIR measurement into glue-laminated timber production plants.
The feasibility of a portable NIR sensor for off-line determination of diverse wood quality aspects relevant in the production of glue-laminated timber was demonstrated. The best performance was noticed for assessing wood moisture content, with a lower capacity to estimate wood density and mechanical properties. NIR spectroscopy was modestly capable of predicting surface roughness. However, the traceability of the raw resources and the automatic classification of diverse wood defects were successfully demonstrated. The developed chemometric model could predict the total delamination and detailed delamination length. Finally, recommendations regarding further system development were provided with the aim of implementation and integration of the NIR measurement into glue-laminated timber production plants.
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