EVALUATION OF STRUCTURAL WOOD GLUED JOINT QUALITY, DEPENDING ON SELECTED TYPE OF AHDESIVE

Structural wood glued joints are used to bond components of lamellar oragglomerated load-bearing members. Factor that influences the quality of the joint isthe sensitivity of wood mass to ambient humidity changes. Cyclic wetting and dryingof the timber leads to its volume changes and causes shear stress in the area of thebond line. Therefore, selected types of adhesives were tested according to a standardEN 302-1. In addition to shear strength assessment, a wood failure of specimens wasobserved. To get comparative samples for further durability evaluation, the infraredabsorption spectroscopy analysis was performed. Further research will continue withexamination of the joint quality of specimens in long-term external exposition andmacromolecular changes in adhesive structure.