Avaliação de pisos produzidos a partir de toras de clones de Eucalyptus sp. com pequenos diâmetros

Abstract

This study evaluated two Eucalyptus clones, MN 249 and MN 89, for the flooring production using small diameters logs. It was considered the wood physical properties - NBR 7190/97 (ABNT, 1997) and simulation of the product in service (ASTM D 2394/83) with two thicknesses, 8 and 14 mm. The basic density of the clone 89 NM was the highest one (0,615 g/cm3). The contractions were more pronounced in clone NM 249, however, the anisotropy coefficient of this clone was small. In the simulation tests, the floor produced by clone MN 249 presented the lowest deformation rate. The floor of 8 mm, in addition to the differences between clones, there was significant interaction between the positions for the indentation test caused by loads applied in small areas. The deformations obtained for the floor with 14 mm thickness, produced with the MN clone 89, were higher than those found in the literature for the indentation load applied on a small area test. The clone MN 249 presented the best results in both thicknesses.