Performance of polyurea-coated Douglas-fir timbers exposed in Hilo Hawaii

Matthew J Konkler; Jed Cappellazzi; Jeffrey J Morrell

doi:10.1080/20426445.2019.1601825

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Performance of polyurea-coated Douglas-fir timbers exposed in Hilo Hawaii

Journal article

Peer reviewed

Performance of polyurea-coated Douglas-fir timbers exposed in Hilo Hawaii

Matthew J Konkler, Jed Cappellazzi and Jeffrey J Morrell

International Wood Products Journal, Vol.10(1), pp.31-36

2019

DOI: https://doi.org/10.1080/20426445.2019.1601825

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Abstract

douglas-fir

polyurea

decay

brown rot

Antrodia sinuosa

Formosan termites

Coptotermes formosanus

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 States
Jed Cappellazzi (Author) - Oregon State University, United States
Jeffrey 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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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Materials Science, Paper & Wood

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