The potential of producing high added value structural timber from lamellae waste. Classification and visual grading

Horváth, Dénes Ákos and Fehér, Sándor and Báder, Mátyás (2023) The potential of producing high added value structural timber from lamellae waste. Classification and visual grading. WOOD RESEARCH, 68 (3). pp. 532-546. ISSN 1336-4561

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Official URL: https://doi.org/10.37763/wr.1336-4561/68.3.532546

Abstract

This study is the continuation of the first part (Horváth et al. 2023), in which density, bending strength and modulus of elasticity of 100 oak lamellae generated as small-sized production waste were investigated. In this part of the study series, the classification of our sample set is carried out according to the EN 338. A visual pre-grading is presented, to remove the worst specimens and achieve a better final result and a standardized visual grading is also shown. Our results are compared with literature values of clear specimens as well. Amount of 80% of the specimens were found to be suitable for further structural use. The total sample set is classified in strength class D35 (average density 712.6±72.5 kg/m3; average MoRadj 65.4±16.2 MPa; average MoEadj 13.4±3.1 GPa), while the visually pre-graded part with better average test results is classified in strength class D45. Industrial wood residues contain a sufficiently high proportion of elements for further processing, so that after sorting it can be used as raw material for glued-laminated load-bearing timber.

Tudományterület / tudományág

engineering and technology > material sciences and technologies
engineering and technology > wood industry

Faculty

Not relevant

Institution

Soproni Egyetem

Item Type: Article
SWORD Depositor: Teszt Sword
Depositing User: Csaba Horváth
Identification Number: MTMT:34066503
Date Deposited: 28 Jul 2023 09:20
Last Modified: 28 Jul 2023 09:20
URI: http://publicatio.uni-sopron.hu/id/eprint/2775

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