Physical properties of sessile oak (quercus petraea l) used by the wood industry in Kosovo

Abstract

The paper shows some physical properties of sessile oak obtained in Kosovo regions.

In the study are shown: wood shrinkage, specific gravity, shrinkage coefficient for 1% change of moisture content, ratio of shrinkage in tangential and radial direction etc.

The amount of volumetric shrinkage of sessile oak is 15.95%, heartwood part has an average shrinkage 15.41% in

The shrinkage of sapwood part is 17.56%. Specific gravity at: wet condition: (1.013gr/cm³); 12% (0.853gr/cm³) and 0% (0.826gr/cm³) of moisture content.

Specific gravity of heartwood at: wet condition (1.05gr/cm3); 12% (0.88gr/cm³); 0% (0.85gr/cm³). The specific gravity of sapwood at: wet condition (0.91gr/cm³); 12% (0.77gr/cm³); 0% (0.748gr/cm³).

The ratio of average shrinkage between tangential and radial cutting direction is 1.71%. This ratio was significantly higher in sapwood than heartwood.

Coefficient of shrinkage (changing 1% of moisture content) in the radial direction is 0.00196, and 0.00323 in tangential direction.