| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 108.87 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Heat treatments for technological improvement of wood were made in the presence of
air using Eucalyptus globulus. The heat treatment was made using an oven during 2 to
24 h and temperatures of 170 ºC, to 200 ºC. Mass losses increased with treatment time
and temperature. Anti Shrinking Efficiency (ASE) between treated and untreated
samples was calculated at 35%, 65% and 85% relative humidity for radial and
tangential directions. Bending strength and MOE were also determined. Equilibrium
moisture content of heat-treated wood decreased by 67%. 87%Radial ASE35% for
Tangential ASE35% was usually higher than radial. ASE65% and ASE85% showed
behaviour similar to ASE35% but smaller. All ASE values increased with temperature
and treatment time. Bending strength and MOE decreased with mass loss.
Descrição
Palavras-chave
Heat treatment Wood modification Dimensional stability Equilibrium moisture content Eucalyptus globulus Mechanical resistance,
Contexto Educativo
Citação
Esteves, B., Domingos, I., Pereira, H. 2005 “Technological improvement of Portuguese eucalypt and pine woods by heat treatment” In: Abstracts of the Second European Conference on Wood Modification (ECWM2). Göttingen, Alemanha, pp.