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Analytical tools to predict changes in properties of oriented strandboard exposed to the fungus Postia placenta

  • Scott M. Kent , Robert J. Leichti , Jeffrey J. Morrell , David V. Rosowsky and Stephen S. Kelley
Published/Copyright: May 1, 2006
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Holzforschung
From the journal Volume 60 Issue 3

Abstract

Weight loss, specific gravity and strength are traditional measures of how wood changes after fungal exposure. This study investigated the effects of fungal decay on properties of oriented strand board (OSB) made of aspen including weight loss, specific gravity, dowel-bearing strength, shear strength, and alkali solubility. Shear strength and alkali solubility were strongly correlated with specific gravity. In addition, X-ray densitometry and near-infrared (NIR) spectroscopy were used to study the decay process. X-Ray densitometry was used to assess localized density around the dowel-bearing embedment zone of a nail. A statistical model using the specific gravity directly under the nail from dowel-bearing strength tests as the explanatory variable had a higher coefficient of determination than models using the gross specific gravity of the sample. Predictive models using NIR spectro-scopy, in combination with multivariate statistical methods, showed promise as predictors of weight loss, shear strength, dowel-bearing strength, and solubility.

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Corresponding author. Oregon State University Corvallis, OR 97331-5709, USA

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Published Online: 2006-05-01
Published in Print: 2006-05-01

©2006 by Walter de Gruyter Berlin New York

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