The effects of copper-based preservative technologies on the resistance of aspen strandboards to biological degradation

C Vidrine; F Kamke; A Preston; Jeffrey J Morrell

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The effects of copper-based preservative technologies on the resistance of aspen strandboards to biological degradation

Journal article

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The effects of copper-based preservative technologies on the resistance of aspen strandboards to biological degradation

C Vidrine, F Kamke, A Preston and Jeffrey J Morrell

Wood and Fiber Science, Vol.41(3), pp.211-219

2009

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https://wfs.swst.org/index.php/wfs/article/view/652/652View

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Abstract

Oriented strandboard

OSB

copper ammine

zinc borate

DCOI

isothiazolone

tebuconazole

durable composites

mold resistance

aspen

Populus tremuloides

Mold and decay resistance of aspen strandboards treated with various copper-based preservative systems were evaluated in laboratory tests. Five copper-based chemicals or zinc borate were blended into the aspen furnish at three retention levels. Tebuconazole or 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one (DCOI) were added as cobiocides to selected copper-based treatments. Panels were inoculated with four common molds and subjected to high temperature and humidity for 8 wk according to AWPA Standard E24. Most panels experienced extensive mold growth, but panels treated with DCOI had marked resistance to attack as did combinations of copper-based preservatives and DCOI. Panels were also assessed for decay resistance in a laboratory soil-block test against the brown-rot fungus Gloeophyllum trabeum or the white-rot fungus, Trametes versicolor, according to AWPA Standard E10. All preservatives reduced weight losses caused by G. trabeum or T. versicolor below 10%, except for micronized copper hydroxide or DCOI alone. The four other copper-based preservatives performed well independently and with the addition of DCOI or tebuconazole. The results suggest that incorporating combinations of copper-based preservative systems with organic cobiocides improved decay and mold resistance of aspen-oriented strandboard.

Details

Title: The effects of copper-based preservative technologies on the resistance of aspen strandboards to biological degradation
Authors: C Vidrine (Author)
F Kamke (Author) - Oregon State University, United States
A Preston (Author)
Jeffrey J Morrell (Author) - Oregon State University, United States
Publication details: Wood and Fiber Science, Vol.41(3), pp.211-219
Publisher: Society of Wood Science and Technology
Date published: 2009
ISSN: 0735-6161
Organisation Unit: University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life
Language: English
Record Identifier: 99450800302621
Output Type: Journal article

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