Volume 20
Issue 1
Wood Technology
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
DOI:10.30825/5.ejpau.20.2017.20.1, EJPAU 20(1), #02.
Available Online: http://www.ejpau.media.pl/volume20/issue1/abs-02.html
MECHANICAL PERFORMANCE OF THERMALLY MODIFIED BLACK PINE (PINUS NIGRA L.) WOOD
DOI:10.30825/5.EJPAU.20.2017.20.1
Vasiliki Kamperidou, Ioannis Barboutis
Laboratory of Wood Products and Furniture Technology, Faculty of Forestry and Natural Environment, Aristotle University of Thessaloniki, Greece
ABSTRACT
In this research, thermal modification of black pine (Pinus nigra L.) wood was conducted at 180°C and 200°C, for 3–7 hours and some essential mechanical properties, such as modulus of rupture (MOR), modulus of elasticity (MOE), impact bending strength, compression strength, hardness in tangential and radial direction and surface roughness, were examined. It was observed that, as the intensity of treatment increases, the equilibrium moisture content and density of modified wood tend to decrease. The treatments of 180°C resulted in an improvement of bending strength, while treatments of 200°C caused a decrease. MOE of treated specimens increased regardless the duration or temperature. The treatments of 180°C increased the hardness, while at 200°C this improvement was limited to smaller increase and a reduction in subsequent treatments. Treatments of 180°C appeared to improve the impact bending strength, compared to control, while the treatments of 200°C demonstrated a strength decrease. Additionally, all the treatments improved the compression strength of pine, and referring to surface roughness, only the milder treatment managed to decrease it.
Key words: Thermal modification, Bending, Elasticity, Hardness, Mechanical properties, Roughness.
Vasiliki Kamperidou
Laboratory of Wood Products and Furniture Technology, Faculty of Forestry and Natural Environment, Aristotle University of Thessaloniki, Greece
Phone +30-2310-998895
Fax +30-2310-998947
54124 Thessaloniki
Greece
email: vkamperi@for.auth.gr
Ioannis Barboutis
Laboratory of Wood Products and Furniture Technology, Faculty of Forestry and Natural Environment, Aristotle University of Thessaloniki, Greece
Phone +30-2310-998895
Fax +30-2310-998947
54124 Thessaloniki
Greece
email: jbarb@for.auth.gr
Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.