11.11. Improving dried wood products performance

 Public examination of a doctoral dissertation in the field of wood science

Doctoral candidate: M.Sc. Marc Borrega Sabaté 

Date and venue: 11.11.2011, at 12 noon, BOR 100, Borealis, Joensuu campus 

In the Nordic countries, wood is largely used as a construction material. Before being placed under service conditions, wood is often dried, and therefore its structure and properties are somewhat modified. In his research conducted at the School of Forest Sciences in Joensuu, Mr. Marc Borrega has investigated the mechanisms that occur during drying, and has evaluated their effects on the structure and properties of wood. 

The study concludes that the performance of dried wood in structural applications could be enhanced by conducting a rapid high-temperature drying process, down to a low moisture content. Such a drying process seems to favor the formation of internal bonds within the wood structure. As a result of increased internal bonding, the mechanical properties are improved and the capability of wood to adsorb moisture from the environment is reduced. The reduction in moisture content may also improve the dimensional stability of wood products. 

The laboratory work has been conducted on small and clear spruce wood samples. Further research on samples of commercial dimensions, containing natural defects, is still necessary. Nonetheless, the results may already provide a basis for developing drying methods that improve the performance of dried wood products. 

The doctoral dissertation of M.Sc. Marc Borrega Sabaté entitled “Mechanisms affecting the structure and properties of heat-treated and high-temperature dried Norway spruce (Picea abies) wood” will be examined at the Faculty of Science and Forestry. The opponent in the public examination Professor Nasko Terziev, Swedish University of Agricultural Sciences (SLU) and the custos is Professor Petri Kärenlampi of the University of Eastern Finland.

Photo available for download at http://www.uef.fi/vaitoskuvat

Contact: Marc Borrega, tel. +358 44308 1178, marc.borrega@aalto.fi

Publishing year: 2011

Back to this years article listing