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- Title
Modificação térmica nas propriedades físicas da madeira.
- Authors
Marques de Menezes, Walmir; Santini, Elio José; Telles de Souza, Joel; Gatto, Darci Alberto; Haselein, Clovis Roberto
- Abstract
The objective of this research was to evaluate the effect of thermal change in the physical properties of wood Corymbia citriodora and Eucalyptus saligna, compared with the control (untreated wood). For that were sampled three trees of each species, with approximately 40 years of age, which were taken the first two logs 3 feet long. The thermal modification of wood was conducted by employing final temperature of 140°C, 160°C and 180°C for 2.5 hours, over the control (no treatment) using an oven with forced air circulation. Tests of physical properties were performed according to established procedures in ASTM and adaptations (ASTM 143-94, 2000), and consisted in evaluating the equilibrium moisture content, weight loss, swelling coefficient of total (linear and volumetric) and coefficient anisotropy. Overall, the results showed that the thermal modification was effective in reducing the moisture balance, weight loss, decrease in swelling and total anisotropy coefficient of both species, with the higher values observed in the treatments of higher temperatures.
- Subjects
THERMAL properties of wood; EUCALYPTUS saligna; ASTM Fire Standards (Book); AMERICAN Society for Testing Materials; MOISTURE; ANISOTROPY
- Publication
Ciência Rural, 2014, Vol 44, Issue 6, p1019
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782014000600011