Relationship between density and anatomical structure of different species of Eucalyptus and identification of preservatives

Abstract

The species and density of Eucalyptus wood poles installed in the electrical network are useful parameters which must be considered when it is necessary to establish the service life of these structures. In this work, eucalyptus poles samples were collected and analyzed by scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS). SEM image analysis showed that the lumen diameter average of fiber substantially is variable between the three species studied, in line with the wood density obtained in laboratory, for poles with several years in service in the electricity network, as well as for not used poles. In addition, EDS microanalysis was utilized for identify the presence of chemical preservatives employed in the conservation these poles. The analysis method proposed proved effective for characterization for this timber.

Density as Estimator of Dimensional Stability Quantities of Brazilian Tropical Woods

“…Undoubtedly, apparent density (ratio between mass and volume of a specimen at known moisture content) is the more easily obtained property (Dias and Lahr 2004;Abruzzi et al 2013;Sales and Lahr 2014).…”

“…Based on a mechanical analysis of a cell model, wherein the implications of the wall microstructure are taken into account, the authors show that the nature of its microstructure is crucial for explaining the shrinkage behavior of wood, with respect to its density. Abruzzi et al (2013) tried to relate density and anatomical characters for poles installed in the electrical network, of three Eucalyptus wood species. Image analysis showed that the mean lumen diameter of fibers varied expressively among the three species studied, in line with the wood density obtained in a laboratory, for poles with several years in service, as well as for unused poles.…”

Estimativa da resistência à tração nas madeiras de dez espécies de eucalipto em função de parâmetros anatômicos e da densidade aparente

“…Também, os resultados das propriedades físicas e mecânicas das espécies E. camaldulensis, E. alba, E. tereticornis também se mostraram próximos aos valores indicados por esta norma brasileira. Para as amostras de E. urophylla os resultados foram próximos dos valores da norma brasileira [14] e de outros estudos [20,[31][32][33][34][35][36][37][38]. Os valores determinados para a madeira de E. cloeziana ficaram próximos aos determinados por outros autores que estudaram as propriedades dessa espécie [39,40] e também quando comparados com os valores fornecidos pela norma brasileira [14].…”

“…Os resultados das características anatômicas das espécies deste trabalho, identificados na Tabela 5 e ilustrados a partir das Figuras 3 e 4, se encontram bastante próximos aos encontrados por outros autores [4,31,[33][34][35].…”

“…Aumentos no comprimento das fibras e na espessura da parede das fibras implicam em aumentos na densidade da madeira [41]. Outros autores como ABRUZZI et al [31] e POUBEL et al [43] analisando espécies de Eucalyptus também encontraram fortes correlações entre a densidade e o diâmetro do lúmen.…”