AESTHETIC AND STRENGTHS CHANGES IN THERMALLY TRETAED BEECH FALSE HEARTWOOD (Fagus Sylvatica L.)
Date Issued
2013
Author(s)
Mihajlovski Nikola
Konstantin Bahchevandjiev
Abstract
This paper discuses the aesthetic changes and some of the mechanical changes in native beech
wood (Fagus sylvatica L.) and beach wood which has developed false heartwood, before and after
being thermally treated. The aesthetic properties, colour and texture are determined visually, whereas
some of the mechanical properties which have been tested are pressure strength, bending strength and
the elasticity modulus under stress (when bending wood).
Discolouration, also called false heartwood, becomes identical with the colour of native beech
after being treated at 1800C, and at 2300C the colour and texture get dark. Pressure strength of native
beech wood increases after thermal treatment, but it is lower than in beech false heartwood. After
thermal treatment there are no significant differences in bending strength and elasticity modulus of
native beech wood and beech false heartwood. Thermal treatment at 1800C drastically reduces the
bending strength, but increases the elasticity modulus.
wood (Fagus sylvatica L.) and beach wood which has developed false heartwood, before and after
being thermally treated. The aesthetic properties, colour and texture are determined visually, whereas
some of the mechanical properties which have been tested are pressure strength, bending strength and
the elasticity modulus under stress (when bending wood).
Discolouration, also called false heartwood, becomes identical with the colour of native beech
after being treated at 1800C, and at 2300C the colour and texture get dark. Pressure strength of native
beech wood increases after thermal treatment, but it is lower than in beech false heartwood. After
thermal treatment there are no significant differences in bending strength and elasticity modulus of
native beech wood and beech false heartwood. Thermal treatment at 1800C drastically reduces the
bending strength, but increases the elasticity modulus.
Subjects