Avaliação da madeira de eucalyptus sp. para a produção de piso a partir de toras de pequenos diâmetros

• Ano de defesa: 2008
• Autor(a) principal: Santos, Iêdo Souza
• Orientador(a): Lima, José Tarcísio
• Banca de defesa: Trugilho, Paulo Fernando, Rabelo, Giovanni Francisco
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DCF - Programa de Pós-graduação
• País: BRASIL
• Palavras-chave em Português: Eucalyptus sp.; Madeira; Piso; Flooring; Wood
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/2452

Eucalyptus sp. trees with 20 cm of diameter are considered small by some forestry industries. However, industries that produce small dimensions floorings can use these trees. The production of floorings using small dimensions Eucalyptus sp. logs contributes to increase their diversity of applications. The aim of this work was to evaluate two Eucalyptus clones, MN 249 and MN 89, for the production of floorings using small diameter logs. The physical properties, the logs sawing yield, the board defects post-sawing and post-kiln drying and the simulated service testing of wood flooring were considered. The balanced tangential parallel to the log center sawing was used. The evaluation of the post-sawing and post-drying were done according to adaptations applied in the standards of measurement and classification to tropical lumber. The collapse was evaluated using image analysis software. The simulated service of wood flooring was done using two thickness flooring (8 and 14 mm). The basic density of the clone MN 89 was higher. The shrinkages were higher in the clone MN 249, but its anisotropic coefficient was lower. The yield post-sawing was higher in the clone MN 89, however the yield post-drying was higher to the clone NM 249. The most evident defect post-sawing was end-splitting and post-drying was the collapse. The drying process spent 17 days and the wood moisture content reached 11%. The clone MN 249 presented the lowest damage for the simulated service testing. The 8 mm thick floorings presented, besides the differences between clones, interaction between the test positions and indentation caused by loads applied on small areas. The deformations obtained to the 14 mm thick floorings produced with clone MN 89 were higher than those founded in the literature considering the indentation tests applied on small areas. The clone MN 249 presented the best results in both thicknesses.