Effect of Layer Arrangement on Expansion, Bending Strength and Modulus of Elasticity of Solid Wood and Laminated Veneer Lumber (LVL) Produced from Pine and Poplar
In this study, it was aimed to determine whether or not the layer organizations were influential on the expansion in volume after keeping in water for 2 hours, on the bending strength and modulus of elasticity values of laminated veneer lumber (LVL). Austrian pine (Pinus nigra) (A) and Lombardy poplar (Populus nigra) (B) veneers with thicknesses of 3 mm were used for the production of laminated veneer lumber. A total of 110 test specimens with 8 different layer organizations were prepared by using polyvinyl acetate based (PVAc-D4) adhesive. Solid Austrian pine and Lombardy poplar woods in the same dimensions were used as control specimens. At the end of the tests; the bending strength and modulus of elasticity values of all the LVLs with different combinations were found to be higher compared to the control specimens. The strength characteristics of the LVL increase as the percentage of Austrian pine increases.
Key Words: Lamination, Laminated Veneer Lumber (LVL), Bending Strength, Modulus of Elasticity, PVAc Adhesive.