Wood hygroscopicity of three forestry species deteriorated by Nasutitermes termites
DOI:
https://doi.org/10.4336/2018.pfb.38e201701528Keywords:
Eucalyptus, Shrinkage, Wood qualityAbstract
The objective of this work was to evaluate hygroscopicity modification of Eucalyptus dunnii, E. saligna and Corymbia maculata wood due to termites attack. Using samples measuring 20 x 20 x 150 mm³ (tangential x radial x longitudinal) the equilibrium moisture content (MCE), linear contractions of the tangential and radial planes (βT e βR), contraction anisotropy (CAβ), water absorption (AA) and water absorption rate (TAA) of healthy and deteriorated wood by Nasutitermes termites were evaluated. It was verified that the termite attack caused increase in TUE and reduction in βT. However, βR and CAβ presented different behaviors, varying among the different species. AA and TAA presented higher water absorption intensity in the first hours of immersion, being higher in the control group in comparison with the deteriorated samples. Possibly the variations in the parameters related to the wood hygroscopicity of the studied species are correlated to the increase of porosity and deterioration mainly of cellulose and hemicelluloses, directly affecting the wood´s ability to absorb and lose moisture, compromising the material quality.Downloads
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Published
2018-07-11
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How to Cite
GALLIO, E. et al. Wood hygroscopicity of three forestry species deteriorated by Nasutitermes termites. Pesquisa Florestal Brasileira, v. 38, 11 Jul.2018.
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