Termite resistance of copper-based preservative supplemented aspen strandboards

IRG/WP 12-30594

J J Morrell, C Vidrine, A Preston, L Jin

Termite resistance of aspen strandboards treated with various copper-based preservative systems was evaluated in field exposure tests. Five copper-based chemicals or zinc borate were blended into aspen furnish at three retention levels prior to pressing. Tebuconazole or 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one (DCOI) were added as co-biocides to selected copper-based treatments. Sections from the panels were exposed to a colony of Formosan termite (Coptotermes formosanus) in an American Wood Protection Association Standard E21 test. Incorporating some combinations of copper-based preservative systems with organic co-biocides markedly improved the termite resistance of aspen oriented strandboard.

Keywords: oriented strand board, OSB, copper complex, zinc borate, DCOI, isothiazolone, tebuconazole, durable composites, termite resistance, aspen, Populus tremuloides

Conference: 12-05-06/10 Kuala Lumpur, Malaysia

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