Study on Physico-Mechanical Properties of the Modified Alkaline Aluminosilicate Adhesive-Bonded Timber Elements

The purpose of the work was to study physico-mechanical properties of glued connections of wood rods, toothed lamellae after splicing and corner spike clamping of window frames which were obtained in the production conditions. The alkaline aluminosilicate binder-based adhesive (glue) of the composition 0.8Na2O·Al2O3·4.5SiO2·20H2O modified using organo-mineral additives was used in testing. After solidification of the adhesive, the samples were cut to determine the strength of frame corner joints in bending, glued timber connections for splitting along the grains, toothed glued connections in bending and water resistance of the glued connections of timber elements. The results of these tests showed high values of strength characteristics in case of the proposed modified alkaline aluminosilicate binder-based adhesive (glue), which were by 1.5 times higher than those in case of the WoodMax (D2) taken as a reference glue, and in water resistance complied with Class D2/D3 as per PN-EN 204.