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Embedment properties of thermally modified spruce timber with dowel-type fasteners

Van Blokland, Joran and Florisson, Sara and Schweigler, Michael and Ekevid, Torbjörn and Bader, Thomas K. and Adamopoulos, Stergios (2021). Embedment properties of thermally modified spruce timber with dowel-type fasteners. Construction and Building Materials. 313 , 125517
[Research article]

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Abstract

This study investigates the effect of thermal modification, ThermoWood Thermo-D treatment versus no treatment, on the embedment properties of Norway spruce timber (Picea abies [L.] Karst.) with dowel-type fasteners. The test specimens were reinforced to prevent splitting of the wood. The influence of density, load direction, test specimen configuration (full hole versus half hole), moisture content, gauge points and calculation method were also evaluated. Thermal modification primarily affected the embedment strength parallel to the grain, which was ∼ 25% higher after thermal modification, mainly due to the change in physical properties because of the treatment, i.e. the lower equilibrium moisture content. The influence of the investigated parameters on embedment properties of thermally modified spruce followed similar trends as for unmodified spruce. It was for example seen that the density–embedment strength relationships still hold after the treatment despite the decrease in density and the increase in embedment strength parallel to the grain. However, after thermal modification, the influence of load direction on embedment strength was ∼30% larger and the influence of calculation method (yield versus ultimate strength) on embedment strength perpendicular to the grain was ∼10% smaller.

Authors/Creators:Van Blokland, Joran and Florisson, Sara and Schweigler, Michael and Ekevid, Torbjörn and Bader, Thomas K. and Adamopoulos, Stergios
Title:Embedment properties of thermally modified spruce timber with dowel-type fasteners
Series Name/Journal:Construction and Building Materials
Year of publishing :2021
Volume:313
Article number:125517
Number of Pages:13
ISSN:0950-0618
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:ASTM D 5764-97a, embedment stiffness, embedment strength, EN 383, foundation modulus, full-hole test, half-hole test, Norway spruce, ThermoWood®
URN:NBN:urn:nbn:se:slu:epsilon-p-114327
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114327
Additional ID:
Type of IDID
DOI10.1016/j.conbuildmat.2021.125517
ID Code:26253
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:01 Dec 2021 16:25
Metadata Last Modified:01 Dec 2021 16:31

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