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Orientador(es)
Resumo(s)
Sapwood and heartwood samples of Pinus pinaster were treated in an oven at 190ºC and 200ºC for
2-6h. Dimensional stability, measured as Anti Shrinking Efficiency (ASE) between 0% and 65%
relative humidity, durability against fungi, mechanical resistance (MOE and MOR), hardness and
chemical composition were determined for treated and untreated sapwood and heartwood. Radial
ASE reached 52% for sapwood and 50% for heartwood while tangential ASE reached 50% and
40% respectively. MOE increased slightly at the beginning of the treatment decreasing afterwards.
No significant differences were found between sapwood and heartwood. MOR decreased by 50%
and 30% for sapwood and heartwood respectively. A significant increase in durability against
Rhodonia placenta was found for both heartwood and sapwood at the higher temperature and for
heartwood only at 190º for 4h.
Descrição
Palavras-chave
Dimensional stability Durability Heartwood Heat treatment Mechanical properties Sapwood
Contexto Educativo
Citação
Esteves, B., Nunes, L., Domingos, I., & Pereira, H. (2014). Comparison between heat treated sapwood and heartwood from Pinus pinaster. European Journal of Wood and Wood Products, 72(1), 53–60. doi:10.1007/s00107-013-0751-y.
Editora
Springer