Effect of Low Temperatures on the Block Shear Strength of Norway Spruce Glulam JointsShow others and affiliations
Number of Authors: 62016 (English)In: BioResources, E-ISSN 1930-2126, Vol. 11, no 4, p. 9638-9648Article in journal (Refereed) Published
Abstract [en]
The block shear strength of Norway spruce (Picea abies (L.) Karst.) glulam joints was tested under low temperatures. Glulam samples were glued with the three of the most common outdoor structural adhesives. The cold temperatures tested were 20, -20, -30, -40, -50, and -60 degrees C. Within the temperature test range, the block shear strength of the glulam joints was resistant to the effect of temperature. As the temperature decreased, the joints' block shear strength did not show any significant change. In most cases, phenol-resorcinol-formaldehyde (PRF) adhesive yielded the strongest block shear strength, while melamine-formaldehyde (MF) adhesive yielded the weakest block shear strength. Melamine-urea-formaldehyde (MUF) adhesive yielded similar results to those of MF adhesives for all temperatures tested. The block shear strengths of the glulam joints with PRF, MUF, and MF adhesives were not sensitive to temperature change. The results indicated that PRF, MUF, and MF adhesives are stable for outdoor structural engineered wood construction in cold climates. The results also suggest that the SS-EN 14080 (2013) standard for the block shear method may not be the proper standard for testing differences in shear strength at different temperatures. The EN 302-1 (2011) standard could be more suitable for this purpose.
Place, publisher, year, edition, pages
2016. Vol. 11, no 4, p. 9638-9648
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-4938DOI: 10.15376/biores.11.4.9638-9648ISI: 000391801300114Scopus ID: 2-s2.0-85098673295Local ID: 2f02c1a3-7682-484b-82aa-e36c57d62d9bOAI: oai:DiVA.org:ltu-4938DiVA, id: diva2:977812
Note
Validerad; 2017; Nivå 2; 2017-02-10 (andbra)
2016-09-292016-09-292024-07-04Bibliographically approved