Impacts of Impregnation with Fire Retardant Chemicals on the MOE in Bending of Some Woods

Year 2017, Volume: 20 Issue: 3, 607 - 612, 15.09.2017

Hakan Keskin , Erhan Mutlu

Abstract

This
study has been performed to determine the effects of impregnation with fire
retardant chemical materials on the modulus of elasticity (MOE) in bending of
Oriental beech, European oak and Scotch pine wood materials. To achieve this
goal, test samples prepared from woods of Oriental beech, European oak and Scotch pine according to TS EN 345
regulations were impregnated with ammonium-sulfate [(NH₄)₂S0₄],
sodium acetate (NaC₂H3O₂3H₂O), aluminum
chloride (Al₂C₆I₂H₂O), borax [Na₂B₄O₇5H₂O],
boric acid [H_3.BO₃] and, borax + boric acid (w:w=%50:50). The modulus of elasticity in
bending of impregnated wood samples were
determined according to TS EN 408. Consequently,
according to wood species; modulus of elasticity in bending was found the highest value at beech (10350
N/mm²) and the lowest value at pine wood (9501 N/mm²).
According to variety of impregnation; modulus of elasticity in bending values were found no
statistical difference ​​ between control samples and impregnated test samples.
Considering the interaction of wood type and process; modulus of elasticity in
bending was found the highest value at beech +
borax (11450 N/mm²) and the lowest value at pine + control samples
(8223 N/mm²). As a result, in the
massive construction and furniture elements that the modulus of
elasticity in bending after the impregnation
with borax is of great concern, Oriental beech wood materials could be
recommended.

Keywords

Fire retardant chemicals, modulus of elasticity in bending, impregnation, wood

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