Impact of impregnation chemical on the bending strength of solid and laminated wood materials

The aim of this study was to investigate the effect of impregnation chemical on the bending strength of the solid and laminated wood materials. For this aim, Oriental beech, European oak, Scotch pine, Oriental spruce and Uludag fir woods impregnated with Imersol Aqua according to ASTM D 1413-99 and producers’ definition. Laminated wood samples were produced from the impregnated wood materials according to TS EN 386 in the five ply form (4 mm each) from beech, oak, pine, fir and spruce wood by using Desmodur-VTKA adhesive. The bending strength values were measured according to TS EN 408. Consequently, the bending strength of impregnated + laminated (I + LW) softwoods, pine, spruce and fir increased, respectively by 10.06%, 1.83% and 5.78% whereas the bending strength of impregnated + laminated hardwoods, beech and oak decreased, respectively by 4.78% and 9.15% with respect to laminated control samples (LW). Considering the interaction of wood type and process, the bending strength was obtained from laminated Oriental beech, whereas the lowest was found for impregnated Uludag fir. In consequence, in the massive construction and furniture elements that the bending strength after the impregnation and lamination (I + LW) is of great concern, beech and pine materials could be recommended.