This work aimed to evaluate the physical properties of laminated bamboo lumber - LBL in relation to
species, preservative treatments and adhesive employed. Laths of
Dendrocalamus giganteus
and
Bambusa vulgaris
bamboos older than three years were produced cross-linked polyvinil acetate (PVAc) the other
in solution of disodium octaborate tetrahydrate (Na
2B
8O
134H
2O) - Timbor, with 2% concentration, during
15 days. After treated and air season, the laths were transformed into strips with dimensions of 0.5 x 3.0 x 45 cm (thickness x width x length) and employed in the manufacture of laminated bamboo lumbers.
The adhesives used for gluing the strips were the basis of polymer isocyanate emulsion (PIE), melamine urea
formaldehyde (MUF), polyvinyl acetate cross (PVAc) and resorcinol formaldehyde (RF). The preservative
treatments and the adhesives did not influence the densities of LBLs manufactured with
Dendrocalamus
giganteus. For the
Bambusa vulgaris, the densities of LBLs were affected by the type of adhesive. It was
observed that the LBLs manufactured with
Dendrocalamus giganteus had a higher dimensional stability
than those produced with the
Bambusa vulgaris. The MUF and RF adhesives have given greater dimensional
stability to the BLCs produced with both species of bamboo. The LBLs adhered with EPI or PVA had
greater delamination, regardless the species of bamboo and the preservative treatment, not being suitable
for external uses.