Journal article
Performance of polyurea-coated Douglas-fir timbers exposed in Hilo Hawaii
International Wood Products Journal, Vol.10(1), pp.31-36
2019
Abstract
The potential for polyurea coatings to improve wood crossarm performance was assessed on untreated and treated Douglas-fir exposed to termite/fungal attack in Hawaii. Treated materials performed similarly regardless of coating, although coating reduced UV damage. Untreated non-coated timbers were decayed within 2-years of exposure and were unserviceable after 7 years. Upper surfaces of coated, untreated samples experienced pronounced coating loss and contained advanced decay on the undersides of the timbers, but no decay occurred on coated, treated samples. Decay fungi were isolated from treated and non-treated coated arms, but isolation frequency was greater for non-treated materials. Coating thickness declined on both treated and non-treated materials, but the effects were greater on non-treated samples. Termites did not attack treated samples with or without coating, but destroyed untreated, non-coated samples and penetrated the polyurea coating to destroy untreated and borate dipped Douglas-fir. Polyurea coatings provided limited protection for non-treated wood.
Details
- Title
- Performance of polyurea-coated Douglas-fir timbers exposed in Hilo Hawaii
- Authors
- Matthew J Konkler (Author) - Oregon State University, United StatesJed Cappellazzi (Author) - Oregon State University, United StatesJeffrey J Morrell (Author) - University of the Sunshine Coast
- Publication details
- International Wood Products Journal, Vol.10(1), pp.31-36
- Publisher
- Taylor & Francis Ltd.
- DOI
- 10.1080/20426445.2019.1601825
- ISSN
- 2042-6445
- Organisation Unit
- Forest Research Institute; National Centre for Timber Durability and Design Life; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99451128502621
- Output Type
- Journal article
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- Domestic collaboration
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- Materials Science, Paper & Wood
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