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Wood Science and Technology

Erschienen in:

28.11.2018 | Original

Density and density profile changes in birch and spruce caused by thermo-hydro treatment measured by X-ray computed tomography

verfasst von: Vladimirs Biziks, Joris Van Acker, Holger Militz, Juris Grinins, Jan Van den Bulcke

Erschienen in: Wood Science and Technology | Ausgabe 2/2019

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Abstract

Birch and spruce samples were scanned using X-ray computed tomography (CT) to determine changes in the density and density profile caused by thermo-hydro treatment (THT). Small-dimension wood blocks were subjected to treatment at three different temperatures (160 °C, 170 °C and 180 °C) for 1 h and scanned before and after treatment. Identical acquisition and analysis procedures were used to evaluate the changes in approximate mean density and radial density profile of oven-dried untreated and treated material. The X-ray CT scans enabled measuring of the changes in wood density after THT. The results confirm that there were similar tendencies in the total density decrease with increasing temperature. However, variations in density changes between the earlywood (EW) and latewood (LW) of birch and spruce were found. A correlation of the radial density profiles of treated versus untreated specimens showed a similar density decrease in EW and LW in birch wood and inconsistent reductions in spruce wood.

Vorheriger Artikel Mechanical properties of Japanese black pine (Pinus thunbergii Parl.) planted on coastal sand dunes: resistance to uprooting and stem breakage by tsunamis

Nächster Artikel Deep learning for use in lumber classification tasks

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Titel: Density and density profile changes in birch and spruce caused by thermo-hydro treatment measured by X-ray computed tomography
verfasst von: Vladimirs Biziks
Joris Van Acker
Holger Militz
Juris Grinins
Jan Van den Bulcke
Publikationsdatum: 28.11.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Wood Science and Technology / Ausgabe 2/2019
Print ISSN: 0043-7719
Elektronische ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-018-1070-6

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