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How Variability in OSB Mechanical Properties Affects Biological Durability Testing

  • S. F. Curling , J. E. Winandy , C. Carll , J. A. Micales and A. A. Tenwolde
Published/Copyright: June 1, 2005
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Holzforschung
From the journal Volume 57 Issue 1

Summary

Loss in bending strength of wood has been shown to be a more sensitive measure of decay than is weight loss. Using modulus of rupture as the decay criterion is problematic for oriented strandboard (OSB) because of variation in mechanical properties due to particle orientation and size. Moreover, the small specimen size required for such tests increases the variance in mechanical properties. This study compared the variance in bending strength of ASTM D1037 standard-sized specimens and small specimens from two samples of commercial OSB. The small specimens were found to have a significantly higher level of variance in bending strength than the standard-sized specimens. A simple method of sorting the specimens based on strand orientation on the tensile surface significantly reduced the level of variance measured. The effects of differing levels of variance on the size, design and limitations of the experimental study are presented.

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Published Online: 2005-06-01
Published in Print: 2003-01-08

Copyright © 2003 by Walter de Gruyter GmbH & Co. KG

Articles in the same Issue

  1. The Relationship Between Variability of Cell Wall Mass of Earlywood and Latewood Tracheids in Larch Tree-Rings, the Rate of Tree-Ring Growth and Climatic Changes
  2. How Variability in OSB Mechanical Properties Affects Biological Durability Testing
  3. Microfibril Angles Inside and Outside Crossfields of Norway Spruce Tracheids
  4. Reactivity of a Fungal Laccase Towards Lignin in Softwood Kraft Pulp
  5. Lignans and Lipophilic Extractives in Norway Spruce Knots and Stemwood
  6. Investigation of Lignin Oligomers Using Electrospray Ionisation Mass Spectrometry
  7. Reactions of Lignin with Peroxymonophosphoric Acid: The Degradation of Lignin Model Compounds
  8. The Reactions of Lignin Model Compounds with Hydrogen Peroxide at Low pH
  9. Spin Distribution in Dehydrogenated Coniferyl Alcohol and Associated Dilignol Radicals
  10. Ultrastructural Localisation of Glucomannan in Kraft Pulp Fibres
  11. New Method for Quantitative Preparation of Lignin- Carbohydrate Complex from Unbleached Softwood Kraft Pulp: Lignin-Polysaccharide Networks I
  12. Peroxide Bleaching of Parquet Blocks and Glue Lams
  13. Easily Degradable Chlorinated Compounds Derived from Glucuronoxylan in Filtrates from Chlorine Dioxide Bleaching of Eucalyptus globulus Kraft Pulp
  14. Non-Deterministic Description of Wood Radio Frequency Vacuum Drying
  15. Bending Creep of High-Temperature Dried Spruce Timber
  16. Optimization of a Violin Top with a Combined Laminate Theory and Honeycomb Model of Wood
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