TY - JOUR
T1 - Physical Properties of Silver Fir (Abies alba L.) Wood Cladding Modified by Traditional Japanese Charring Method
AU - Ebner, D.H.
AU - Gryc, V.
AU - Barbu, M.-C.
AU - Čermák, P.
N1 - Export Date: 14 December 2023
Correspondence Address: Čermák, P.; Department of Wood Science and Technology, Zemědělská 3, Czech Republic; email: [email protected]
Funding details: Horizon 2020 Framework Programme, H2020, 952314
Funding text 1: The authors are grateful for funding received from the European Union’s Horizon 2020 research and innovation programme under grant agreement N°952314. We would like to acknowledge the contribution of the students of “Forest Products Technology and Timber Construction” of Salzburg University of Applied Sciences at Campus Kuchl, namely: M. Kargl, P. Klauser, C. Gruber, and J. Klaushofer.
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PY - 2023/8/22
Y1 - 2023/8/22
N2 - Silver fir (Abies alba L.) wood samples were charred on one surface using an enhanced version of the traditional Japanese Yakisugi method. The 15 charred boards obtained from five charring chimneys were divided into three different zones and investigated for their physical properties. The density profile, water absorption after 24 h of water submersion, and Brinell hardness were analyzed. In general, the temperature-time regime, which causes inside surface carbonization, was more evident at the bottom than at the top of the chimney. The density profile of the specimens revealed that the surface charring treatment decreased the surface density of the wood significantly. A gradient was visible from 383 kg/m² at the bottom to 424 kg/m² at the top. Water absorption measurements showed that a thicker carbonized layer could take up more water as a result of increased porosity. While 3,684 g/m² were absorbed at the bottom, the top accounted for only 2,533 g/m². Furthermore, with increasing thickness of the charred layer, the hardness gradually decreased. The average of the charred specimens reached only 3.2% of the hardness of the uncharred back side of the specimens.
AB - Silver fir (Abies alba L.) wood samples were charred on one surface using an enhanced version of the traditional Japanese Yakisugi method. The 15 charred boards obtained from five charring chimneys were divided into three different zones and investigated for their physical properties. The density profile, water absorption after 24 h of water submersion, and Brinell hardness were analyzed. In general, the temperature-time regime, which causes inside surface carbonization, was more evident at the bottom than at the top of the chimney. The density profile of the specimens revealed that the surface charring treatment decreased the surface density of the wood significantly. A gradient was visible from 383 kg/m² at the bottom to 424 kg/m² at the top. Water absorption measurements showed that a thicker carbonized layer could take up more water as a result of increased porosity. While 3,684 g/m² were absorbed at the bottom, the top accounted for only 2,533 g/m². Furthermore, with increasing thickness of the charred layer, the hardness gradually decreased. The average of the charred specimens reached only 3.2% of the hardness of the uncharred back side of the specimens.
KW - Surface charring
KW - Thermal degradation
KW - Wood charring
KW - Wood cladding
KW - Wood modification
KW - Yakisugi method
KW - Chimneys
KW - Physical properties
KW - Silver
KW - Surface treatment
KW - Wood
KW - Abies alba
KW - Density profile
KW - Silver fir
KW - Thermal degradation'
KW - Wood samples
KW - Water absorption
KW - Abies Alba
KW - Physical Properties
KW - Surface Treatment
UR - https://www.mendeley.com/catalogue/aa0018ee-9d7b-3faa-bd06-f230836c3faa/
U2 - 10.15376/biores.18.4.7066-7077
DO - 10.15376/biores.18.4.7066-7077
M3 - Article
SN - 1930-2126
VL - 18
SP - 7066
EP - 7077
JO - BioResour.
JF - BioResour.
IS - 4
ER -