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52 Materialsterials Jan/Feb 2024 FDM AsiA | www.fdmasia.com

MPa for the parallel and perpendicular MOR, respectively. The T4, and T5 can be classifed as OSB/1, OSB/2, and OSB/3.
results found in this study were slightly superior to the results
from the mentioned authors. Conclusions
When considering the parallel MOE, EN 300 stipulates The aim of this study was to determine the physical and
the minimum values of 2500, 3500, 3500, and 4800 MPa mechanical properties of OSB made from a mixture of three
for them to be classifed as type OSB/1, OSB/2, OSB/3, and Amazonian wood species and Pinus.

OSB/4, respectively. The results indicate that the addition of tropical wood
According to the results, all panels obtained values higher mixture strands signifcantly improved the technological
than what is established by the norm in all classifcations. properties of OSB panels.
For the MOE in the perpendicular direction, the standard Furthermore, the results demonstrated that the studied
establishes the minimum values of 1200, 1400, 1400, and species have potential for use in the manufacturing of OSB.
1900 MPa for OSB/1, OSB/2, OSB/3, and OSB/4, respectively. In terms of physical properties, it was observed that some
It is observed that for the perpendicular MOE, only T1 and OSB that contained wood mixtures showed less swelling in
T3 presented average values above what is required by the thickness than the OSB composed only of pine strands. In
norm for all classifcations. terms of mechanical properties, panels with wood mixtures

Iwakiri et al. obtained an average of 5732 and 2531 MPa, were expected to achieve higher mechanical strength by using
for the parallel and perpendicular MOE, respectively, in OSB tropical species wood rather than pine wood.
panels of wood mixtures of Acrocarpus fraxinifolius, Grevillea It was observed that all resistance values were statistically
robusta, Melia azedarach, and Toona ciliata. similar to the panel composed of 100 percent pine strands,
The internal bond of T3 and T5 was equivalent to each except for the internal bond in which T3 (composed of 60
other and was superior to the others produced using wood percent Amazonian wood strands) was superior to T1 (OSB
mixtures. produced 100 percent with strands of pine).

The EN 300 standard stipulates the minimum values However, even though only the internal bond presents
for the IB property of 0.30, 0.32, 0.32, and 0.45 MPa for superior resistance, it is observed that the mechanical properties
OSB/1, OSB/2, OSB/3, and OSB/4, respectively. T3 reached of panels composed of a mixture of wood showed satisfactory
the minimum value to be classifed as OSB/4, while T1, T3, results compared to panels composed only of pine strands.
Therefore, a mixture of these three species in addition to
pinus could be used to introduce a new competitive product
Christopher Porter on the traditional OSB market. It was observed that the

physical and mechanical properties of OSB panels follow the
EN 300 Standard.

However, more work is needed to understand the behaviour
of tropical woods in the manufacture of OSB panels. It is
recommended that studies of the chemical properties of
wood be conducted to identify the infuence of chemical
composition on the physical and mechanical strength of
the panels. FDM

ENQUIRY NO. 1301