ABSTRACT
The analysis of the transverse vibrations has the potential to evaluate the wood due to its high precision, low cost and quickly, however there are few studies about its use in heat treated wood. The aim of this study was to evaluate the physical and mechanical properties of heat-treated Eucalyptus urophylla and Pinus oocarpa wood and relate the analysis of resonance (Bing) with the modulus of elasticity and modulus of rupture of wood. Three Eucalyptus urophylla and Pinus oocarpa trees were used and specimens were prepared and heat-treated at 150, 175, 200 and 225°C with a heating rate of 5°C/ min, four hours of residence time at atmospheric pressure and the presence of air. The heat treatment reduced the volumetric swelling, linear swelling, anisotropy factor, equilibrium moisture content and mechanical strength of the wood in both species. The resonance analysis (Bing) showed a high correlation with the static modulus of elasticity and modulus of rupture in heat-treated wood for both species, thus, this technique can be used to evaluate the mechanical properties during this process.
Keywords:
Bing, Eucalyptus urophylla; Pinus oocarpa; Heat treatment
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