Issue |
Silva Lusitana
Volume 28, Number 1, 2020
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Page(s) | 1 - 13 | |
DOI | https://doi.org/10.1051/silu/20202801001 | |
Published online | 11 September 2020 |
Evaluation of Eucalyptus triantha Timber for Structural Applications
Avaliação da Madeira de Eucalyptus triantha para Aplicações Estruturais
Evaluation du Bois d’Eucalyptus triantha pour des Applications Structurelles
* Full Professor Ph.D., Federal University of Mato Grosso, Dept. of Architecture & Urbanism, Cuiabá, Brazil. E-mail: mcjanj@gmail.com
Eucalypt wood is an important raw material with multiple uses applied for furniture, pulp and paper, charcoal, biomass, and construction. Sixteen tests were performed to evaluate physical and mechanical properties of Eucalyptus triantha, which could estimate the possibility of utilization of this woody material in construction. In all, about 267 repeats were realized. Two moisture contents were regarded according to the Brazilian and American standard documents: fiber saturation point (30%) and standard dried point (12%). Results were statistically treated with t-test and demonstrated increases in six mechanical properties from Eucalyptus triantha wood species: rupture moduli in perpendicular and parallel compressions and static bending; elasticity moduli in parallel tensile, perpendicular compression, and static bending. Volumetric mass and bulk densities were practically stable. Physical and mechanical properties estimation evinced that Eucalyptus triantha wood can be used in structural elements.
Resumo
A madeira de eucalipto é uma importante matéria-prima de múltiplos usos utilizada em móveis, papel e celulose, carvão vegetal, biomassa e construção. Dezesseis testes foram realizados para avaliar as propriedades físicas e mecânicas do Eucalyptus triantha, os quais puderam estimar a possibilidade de utilização desse material madeirável na construção. Ao todo, aproximadamente 267 repetições foram realizadas. Dois teores de umidade foram considerados segundo os documentos normativos brasileiro e norte-americano: ponto de saturação das fibras (30%) e estado seco padrão (12%). Os resultados foram estatisticamente tratados com teste t e demonstraram aumentos em seis propriedades mecânicas da madeira de Eucalyptus triantha: módulos de ruptura nas compressões normal e paralela e flexão estática; módulos de elasticidade na tração paralela, compressão normal e flexão estática. As densidades básicas e aparentes ficaram praticamente estáveis. A estimativa das propriedades físicas e mecânicas evidenciou que a madeira de Eucalyptus triantha pode ser utilizada em elementos estruturais.
Résumé
Le bois d’eucalyptus émerge comme une matière première importante à usages multiples utilisé dans meubles, pâtes et papiers, charbon de bois, biomasse et construction. Seize essais ont été effectués pour évaluer les propriétés physiques et mécaniques d’Eucalyptus triantha, ce qui pourrait permettre d’estimer la possibilité d’utilisation de ce matériau ligneux dans la construction. En tout, environ 267 rediffusions ont été réalisées. Deux teneurs en humidité ont été considérées selon les documents standard brésiliens et américains: point de saturation des fibres (30%) et point sec standard (12%). Les résultats ont été traités statistiquement avec le test t et ont montré une augmentation de six propriétés mécaniques du bois d’Eucalyptus triantha: modules de rupture en compressions parallèles et perpendiculaires et flexion statique; modules d’élasticité en traction parallèle, compression perpendiculaire et flexion statique. La masse volumétrique et les densités en vrac étaient pratiquement stables. L’estimation des propriétés physiques et mécaniques montre que le bois d’Eucalyptus triantha peut être utilisé dans les éléments structuraux.
Key words: Eucalypt / wood / density / moisture content / strength
Palavras-chave: Eucalipto / madeira / densidade / teor de umidade / resistência
Mots clés : Eucalypt / bois / densité / teneur en humidité / résistance
© INIAV, Oeiras, Portugal 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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