Evelyn Hoffmamm Martins
Abstract:
Brazil is the second largest soybean producer in the world, with yields of around 96.2 million tons per crop, this high yield results in a significant number of residues (soybean pod) generated by soybean cultivation, which may reach approximately 41 million tons per year. This material has lignocellulosic properties, which may be raw material for the production of chipboard. The aim of this study was to evaluate the use of soybean pods in the production of chipboard. For the manufacture of the agglomerated panels was used wood of the hybrid Eucalyptus urophylla and Eucalyptus grandis in composition with the soybean pod, in the proportions of 0%, 25%, 50%, 75% and 100%. The panels were evaluated using a completely randomized design with five treatments and three replications. Linear regression and the Scott-Knott mean test at 5% significance were used to compare the different treatments. Apparent density, compaction ratio, water absorption after 2 hours and 24 hours in water immersion, thickness swelling after 2 hours and 24 hours in water immersion, perpendicular traction, modulus of rupture and modulus of elasticity in static bending were evaluated. In the physical properties of the panels only the density and water absorption after 2 hours of immersion in water did not vary statistically with the increase of soybean pod proportion, the others increased with the increase of it. Mechanical properties decreased with increasing proportion of soybean pods in the production of chipboard.
