| Popis: |
In the furniture industry, the lamination technology is used widely on the bending members and the applicationswhich are needed a higher load-carrying capacity. It is aimed to improve the mechanical properties, weight/strengthratio, and cost of the composite materials by researching the parameters as different wood species, types ofadhesive, types of reinforcement material, and the placement of the layers for the lamination technology. In thescope of the experimental study, 90 mm x 90 mm x 1710 mm sized glued laminated wood consist of 3 and 5 Scotchpine (Pinus sylvestris L.) laminations were manufactured. In the lamination process, epoxy and polyurethaneadhesives were used. Moreover, 3 mm thickness of rubber was used to improve the flexural properties at thelamination surface. The specimens are tested according to TS EN 408+A1 “Timber structures - Structural timberand glued laminated timber - Determination of some physical and mechanical properties” standard. Bendingstrengths were determined in perpendicular to the bonding line and parallel to the bonding line. The test resultswere compared with those of Scotch pine beams (SPB) and the non-reinforced glued laminated wood (NR-glulam)beams. It was observed that the bending strengths of NR-glulam beams were better than those of solid woodenbeams. In addition to that the use of 3 mm thickness of rubber caused to decrease the bending strength significantly.The highest bending strengths were observed from the tests of glued laminated timber beams manufactured usingfive layers with polyurethane adhesive (5PN-glulam). |
