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Original scientific paper
https://doi.org/10.5552/drind.2015.1421

Water Uptake of Thermally Modified Norway Spruce

Mojca Zlahtic ; University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Ljubljana, Slovenia
Nejc Thaler ; University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Ljubljana, Slovenia
Miha Humar   ORCID icon orcid.org/0000-0001-9963-5011 ; University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Ljubljana, Slovenia

Fulltext: english, pdf (1 MB) pages 273-279 downloads: 535* cite
APA 6th Edition
Zlahtic, M., Thaler, N. & Humar, M. (2015). Water Uptake of Thermally Modified Norway Spruce. Drvna industrija, 66 (4), 273-279. https://doi.org/10.5552/drind.2015.1421
MLA 8th Edition
Zlahtic, Mojca, et al. "Water Uptake of Thermally Modified Norway Spruce." Drvna industrija, vol. 66, no. 4, 2015, pp. 273-279. https://doi.org/10.5552/drind.2015.1421. Accessed 13 Jun. 2021.
Chicago 17th Edition
Zlahtic, Mojca, Nejc Thaler and Miha Humar. "Water Uptake of Thermally Modified Norway Spruce." Drvna industrija 66, no. 4 (2015): 273-279. https://doi.org/10.5552/drind.2015.1421
Harvard
Zlahtic, M., Thaler, N., and Humar, M. (2015). 'Water Uptake of Thermally Modified Norway Spruce', Drvna industrija, 66(4), pp. 273-279. https://doi.org/10.5552/drind.2015.1421
Vancouver
Zlahtic M, Thaler N, Humar M. Water Uptake of Thermally Modified Norway Spruce. Drvna industrija [Internet]. 2015 [cited 2021 June 13];66(4):273-279. https://doi.org/10.5552/drind.2015.1421
IEEE
M. Zlahtic, N. Thaler and M. Humar, "Water Uptake of Thermally Modified Norway Spruce", Drvna industrija, vol.66, no. 4, pp. 273-279, 2015. [Online]. https://doi.org/10.5552/drind.2015.1421

Abstracts
Thermal modification of wood has been commercially available for almost twenty years but the complete mechanism of improved durability is still not completely understood. It is known that the temperature and duration of the modification influences the properties of the final products. There are several potential reasons for the increased durability of the modified wood. In recent research in particular, water exclusion efficiency has been identified as one of the key mechanisms. In order to elucidate this presumption, specimens made of Norway spruce heartwood were thermally modified at 6 different temperatures (160 °C, 180 °C, 190 °C, 200 °C, 210 °C and 230 °C) for three hours according to the Silvapro® procedure. Control specimens were left unmodified. Three sets of tests were performed: (a) samples were soaked in water for 4 days and then positioned on load cells and allowed to dry until a constant mass was achieved; (b) short term water uptake was determined with a tensiometer and (c) wood-water interactions were verified using constant gravimetric moisture measurement during outdoor exposure. As expected, the degree of modification was reflected in the moisture content of the wood during testing. Short and medium term water uptakes correlated quite well with the performance of wood in outdoor applications. On the other hand, long term tensiometer measurements were not in line with either short term water uptake or outdoor measurements.

Keywords
load cell; Picea abies; tensiometer; thermal modification; water uptake; field testing

Hrčak ID: 150796

URI
https://hrcak.srce.hr/150796

[croatian]

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