Investigation of Mechanical Behavior of Pre-Heat Treated Wooden Beams in Different Climate Conditions

Abstract

In this study, the behavior of tannin-modified and pre-heat treated wooden beams in different climatic conditions were determined. For this purpose; Samples prepared according to TS EN 386 standards from Scots pine (Pinus sylvestris L.), oak (Quercus petraea L.) and chestnut (Castanea sativa Mill.) woods were impregnated with acorn tannin and pre-heated for 2 hours at 150°C and 160°C. After the samples were conditioned at 20°C temperature and 65% RH, 40°C temperature and 35% RH, 10°C temperature and 50% RH, bending strength tests according to TS 2474 and modulus of elasticity in bending according to TS 2478 were applied. As a result; At the level of wood species-process type interaction, the highest increase in bending strength was determined as 7.6% in tannin modified scotch pine samples at 150ºC compared to the control samples. Accordingly, it can be suggested to use Scotch pine wood in the manufacture of lightly loaded wooden house columns and beams and other building elements.

Keywords

• pre-heat treatment
• wood modification
• oak tannin
• modulus of elasticity
• bending strength