9/21/2017 IUFRO 2017 Division 5 Conference
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Shrinkage characteristics of plantation grown Teak (Tectona grandis Linn.) in Edo State, Nigeria Session: 5.06 Posters (session2024.html)
Division 5 Research Group:
5.06 Properties and Utilization of Plantation Wood Abstract:
The shrinkage characteristics of three age classes 15, 20 and 25 years of plantation grown teak wood was investigated in this study. The tangential, radial and volumetric shrinkage was measured by exposing the teak wood to outdoor conditions for six months. Test samples of 20 x 20 x 30 mm were carefully cut from tree bolts to study the variation in shrinkage along tree height, radially across tree stem and between the age classes. The results showed that the mean radial shrinkage decreased from 0.917 at 15 years to 0.357% at 25 years. The mean tangential shrinkage decreased from 1.609 at 15 years to 0.672% at 25 years. The mean volumetric shrinkage decreased from 2.525 at 15 years to 1.029% at 25 years. The radial, tangential and volumetric shrinkage decreased significantly (p < 0.05) from the base to the top of the tree and increased from the inner wood to the outer wood for all age classes. “Splitting” only occurred in the radial direction and the wood resistance to split increased with tree height and age. Plantation grown teak wood is stable with low shrinkage values and has high resistance to splits and end-checks in outdoor conditions.
Keywords:
Outdoor conditions, plantation grown teak, shrinkage characteristics, tree age classes Authors:
Stephen Amiandamhen, University of Stellenbosch David Izekor, University of Benin
