Empirical Equation for Limit of Hygroscopicity

ABSTRACT

In this paper we are promoting the properties related to wood anatomy and chemical composition as the factor of influence to limit of hygroscopicity of wood (LH).

The wood samples of the most important domestic Hood species: oak Ouercus robur, beech Fogus sylvatica, fir Abies alba and spruce Picea abies were selected for this investigation.

For determining LH in our investigations we have applied the method of compression strength parallel to grain.

The results of experimental measurements were statistically analyzed and the empirical equation for LH dependance upon the significant (influential) factors: temperature. cellullse content and wood density in oven dry state is defined.

Keywords:

• Limit of hygroscopicity
• fiber saturation point
• compression strenght parallel to grain
• thermal treatment
• chemical composition