| Popis: |
This paper investigated the strength of corner tenon joints made from natural ash wood and thermally-modified ash wood. Previously, an analysis of selected physical and mechanical properties of natural and thermal- treated ash wood was performed. The results showed that thermo-treated ash wood in relation to natural ash wood has a remarkable lower wood moisture content, 23% lower bending strength and 25% higher compressive strength parallel to grain. The joints strength (maximal moment), calculated on the basis of measured maximal applied loads (maximal force), were compared for a set of natural ash wood joints and a set of thermo- treated ash wood joints. Results of the tests showed that, for the same test specimen configurations, the maximum force of joints made of natural ash wood was higher than the force values of joints made of thermo-treated ash wood, i.e. the strength of thermo-treated joints has 50% lower value compared to the strength of the natural ash joints. It has been shown that thermal modification changes the technical properties of wood and that therefore thermally modified wood has a remarkable reduced construction quality. |
