Madeira serrada na Região Sul do Espírito Santo : comercialização e propriedades

• Autor(a) principal: Lovatti, Lucélio Pietralonga
• Data de Publicação: 2008
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/6588
• topic: Sawn wood; Equilibrium moisture content; Retratibility; Madeira serrada; Equilíbrio higroscópico; Retratibilidade; Recursos Florestais e Engenharia Florestal; Madeira serrada - Comercialização; Madeira - Efeito da umidade; Higrometria; 630

This research had as general objective to obtain information regarding commercialization and physical properties of the sawn wood marketed in the South area of the Esp?rito Santo State. Seventeen wood deposits were visited and collected samples, as well as applied a questionnaire for obtaining of the information. Through the anatomy of the log forty species being marketed as sawn coming mainly of the Amazonia area were identified. Regarding the collected general information, it can highlight, there are no one use of technical specifications established by entities of normalization, so much for the dimensioning of the pieces as for the quality in relation to defects and problems with the drying of the wood, which are commonly marketed green. The behavior hygroscopic in several conditions of relative humidity of the air and the relationships between retratibility and the moisture content of the wood for the main species was studied. The wood used in the study concerning of the behavior hygroscopic and of the retratibility are deriving from the trade of the area and also of the Laborat?rio de Ci?ncias da Madeira (LCM) of the Departamento de Engenharia Florestal of the Univercidade Federal do Esp?rito Santo. For the sorption curves it was observed that each species possesses own a characteristic that means a differentiated behavior among the wood in the several conditions of relative humidity of the air. In relation to the retratibility with the variation in the moisture content of the samples the shrinkages volumetric, radial and tangential not vary exponentially with the loss of water by wood.