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Finger jointing of freshly sawn Norway Spruce side boards : a comparative study of fracture properties of joints glued with phenol-resorcinol and one-component polyurethane adhesive

Sterley, Magdalena; Serrano, Erik LU ; Enquist, Bertil and Hornatowska, Joanna (2014) RILEM International Symposium on Materials and Joints in Timber Structures In Materials and Joints in Timber Structures : Recent Developments of Technology (RILEM Bookseries) 9. p.325-339
Abstract
<p>Finger jointing of unseasoned Norway Spruce was studied with respect to tensile strength, adhesive penetration and durability. Finger joints were manufactured with 1) unseasoned wood and one component polyurethane (PUR) adhesive, 2) dried wood and PUR adhesive and 3) dried wood and phenol resorcinol formaldehyde (PRF) adhesive. Two levels of wood density were used. The tensile strength of the finger joints was determined and the deformations within the joint were studied with an optical measurement system (ARAMIS). The penetration of the adhesive was studied with x-ray microtomography. The durability of the joints was determined according to the standard ASTM D 4688. The results show that the tensile strength and the durability of... (More)
<p>Finger jointing of unseasoned Norway Spruce was studied with respect to tensile strength, adhesive penetration and durability. Finger joints were manufactured with 1) unseasoned wood and one component polyurethane (PUR) adhesive, 2) dried wood and PUR adhesive and 3) dried wood and phenol resorcinol formaldehyde (PRF) adhesive. Two levels of wood density were used. The tensile strength of the finger joints was determined and the deformations within the joint were studied with an optical measurement system (ARAMIS). The penetration of the adhesive was studied with x-ray microtomography. The durability of the joints was determined according to the standard ASTM D 4688. The results show that the tensile strength and the durability of green glued finger joints are on the same level as that of dry glued PUR joints. The penetration of the PUR adhesive is high in the unseasoned wood and cavities within the bonds seem to be smaller than in dry glued PUR joints. The tensile strength of the finger joints is dependent on density, independent on the adhesive system used. The strength of the green glued PUR adhesive bonds in finger joints measured with small scale specimens did not differ from the strength of the dry glued PUR bonds.</p> (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
finger joint, bond line, fracture, green gluing, digital image correlation, x-ray tomography
in
Materials and Joints in Timber Structures : Recent Developments of Technology (RILEM Bookseries)
volume
9
pages
325 - 339
publisher
Springer
conference name
RILEM International Symposium on Materials and Joints in Timber Structures
external identifiers
  • scopus:84885449084
ISSN
2211-0844
2211-0852
ISBN
978-94-007-7810-8
DOI
10.1007/978-94-007-7811-5_30
language
English
LU publication?
no
id
a74f9ea4-ef17-4d6e-b7f2-da8e070e8621 (old id 4770450)
date added to LUP
2014-11-07 13:43:42
date last changed
2017-07-30 03:09:39
@inproceedings{a74f9ea4-ef17-4d6e-b7f2-da8e070e8621,
  abstract     = {&lt;p&gt;Finger jointing of unseasoned Norway Spruce was studied with respect to tensile strength, adhesive penetration and durability. Finger joints were manufactured with 1) unseasoned wood and one component polyurethane (PUR) adhesive, 2) dried wood and PUR adhesive and 3) dried wood and phenol resorcinol formaldehyde (PRF) adhesive. Two levels of wood density were used. The tensile strength of the finger joints was determined and the deformations within the joint were studied with an optical measurement system (ARAMIS). The penetration of the adhesive was studied with x-ray microtomography. The durability of the joints was determined according to the standard ASTM D 4688. The results show that the tensile strength and the durability of green glued finger joints are on the same level as that of dry glued PUR joints. The penetration of the PUR adhesive is high in the unseasoned wood and cavities within the bonds seem to be smaller than in dry glued PUR joints. The tensile strength of the finger joints is dependent on density, independent on the adhesive system used. The strength of the green glued PUR adhesive bonds in finger joints measured with small scale specimens did not differ from the strength of the dry glued PUR bonds.&lt;/p&gt;},
  author       = {Sterley, Magdalena and Serrano, Erik and Enquist, Bertil and Hornatowska, Joanna},
  booktitle    = {Materials and Joints in Timber Structures : Recent Developments of Technology (RILEM Bookseries)},
  isbn         = {978-94-007-7810-8},
  issn         = {2211-0844},
  keyword      = {finger joint,bond line,fracture,green gluing,digital image correlation,x-ray tomography},
  language     = {eng},
  pages        = {325--339},
  publisher    = {Springer},
  title        = {Finger jointing of freshly sawn Norway Spruce side boards : a comparative study of fracture properties of joints glued with phenol-resorcinol and one-component polyurethane adhesive},
  url          = {http://dx.doi.org/10.1007/978-94-007-7811-5_30},
  volume       = {9},
  year         = {2014},
}