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Title: What does Moisture-Related Durability of Wood Bonds Mean?

Source: In: Csiha, Csilla, Ed. Proceedings of the Final Conference on COST@ 34 Bonding of Timber. 2008 May 6-7; Sopron, Hungary. Sopron, Hungary: Lover-Print. pp. 89-101; May 2008

Author(s)Frihart, Charles R.; Yelle, Daniel J.; Wiedenhoeft, Alex C.

Publication Year: 2008  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4707-2A

Abstract: The accelerated test methods that distinguish between acceptable and unacceptable wood adhesives generally involve subjecting the bonded assembly to abnormally rapid and extreme moisture exposure or cycling. In the United States and Canada, these tests for moisture durability have been established, but selection of the appropriate test methods for the different service classes (extent of water exposure) is still being discussed in some cases. For establishing these standards, a better understanding of the information provided by these tests about the bondline durability is important. Most studies involve different adhesives with the same wood species and evaluate bond efficacy using strength and percentage of wood failure. We studied different wood species, especially in durability testing, to provide crucial insight into the factors that contribute to a durable bond and demonstrate the utility of the percentage of wood failure. The bonding and bond durability of white oak, sugar maple, aspen, Sitka spruce, southern yellow pine, and ipÍ are covered. The data indicate that the wood properties greatly influence the internal or interfacial stress and thus the durability of the bonded assembly.

Keywords: Wood moisture, moisture content, glue, adhesion, adhesives, testing, moisture, white oak, sugar maple, aspen, Sitka spruce, epoxy resins, accelerated life testing, gluing, durability, failure, wood bonding, bond strength, bonding, bondline, exposure tests, southern yellow pine, ipe, swelling, accelerated testing

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 3,201 kb(s)

Date posted: 09/07/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 26554
Current FPL Scientists associated with this product (listed alphabetically)
Frihart, Charles R.
Research Chemist
Wiedenhoeft, Alex C.
Research Botanist

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