Relationship between strength and density in juvenile and mature Eucalyptus sp. wood / Relação entre resistência e densidade em madeira juvenil e adulta de Eucalyptus sp.

Bruno Monteiro Balboni, Alessandra Silva Batista, Rafael de Aguiar Rodrigues, José Nivaldo Garcia


In the future, the trend is that the main type of wood supplied to the market will be juvenile wood, and to understand its properties is highly relevant to the adequate use of this material. Timber specimens from 25-years-old trees (sampled in the heartwood closest to the bark) and 6-years-old from many Eucalyptus sp. species were tested under compression load parallel to grain and had their specific mass measured. Literature data from native wood from the same genus were used for proper comparisons. Adult wood was similar in density and strength in relation to native wood, and juvenile wood had lower properties, although strength had a higher decrease in relation to adult wood than density, resulting in a lower specific strength. The juvenile wood features affected specific strength, but not the proportion of resistance that is influenced by density.


specific strength, compression parallel to grain, planted forest.

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