Development of glued laminated timber dunnage with eucalyptus waste
Name: NAYARA FRANZINI LOPES
Publication date: 27/02/2019
Advisor:
Name |
Role |
|---|---|
| FABRICIO GOMES GONÇALVES | Co-advisor * |
| PEDRO GUTEMBERG DE ALCÂNTARA SEGUNDINHO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| PEDRO GUTEMBERG DE ALCÂNTARA SEGUNDINHO | Advisor * |
| REJANE COSTA ALVES | Internal Examiner * |
Summary: Timber dunnage are used as separators between steel plate and metal profiles in the stowage and storage and are currently made up of pieces of solid sawn timber. However, the reduction of the offer of native species wood to and the inability of the reforestation species to provide pieces of wood with good quality to the market led to the use of alternative techniques for better use of wood. Then there is the technique of glued laminated timber (Glulam) which is the gluing of woods from the association of pieces that are selected and arranged with the fibers parallel to each other for gluing using adhesives and pressing, that can to substitute the solid wood. It is known that this technique has a relevant appeal in terms of the potential of use already established in wood structures. So, this work aimed to develop a type of dunnage with the use of the technology of gluing eucalyptus wood waste from sawmills capable of ensure the safe storage and stowage of steel plates and metal profiles. For this, we made a characterization of the physical properties of the wood, determining the apparent density, the moisture content and the shrinkability. The mechanical tests were performed aiming to evaluate the resistance to normal compression to the fibers, the resistance to parallel compression, the shear strength in wood and in the glue line in two conditions of humidity (dry and saturated), besides the delamination test. Non-destructive tests of free transverse vibration, longitudinal vibration and stress wave in the dunnage were performed. Eucalyptus urophylla x grandis wood has good physical properties, which allows its use for making Glulam elements. Results showed a high resistance of the adhesives in the dry condition, not being found the same performance when tested in the saturated condition. Dunnage made of waste presented satisfactory results when compared to the Glulam dunnage made with an entire lamina, being a good substitute for the existing ones.
Keywords: glued laminated wood, adhesive, physical and mechanical properties, non-destructive testing.
