Abstract
ABSTRACT Thermo-hydro-mechanical (THM) densification is a well-known procedure for improving the properties of low-density wood species, but the long-term behaviour of the densified wood under constant load has not been reported and may restrain its use in construction. This study has investigated the influence of THM densification on the creep behaviour in bending of beech and pine under constant climatic conditions. The specimens were loaded in three-point bending at applied stress level of 35% of the ultimate strength for 14 days at 20 ± 2°C and 65 ± 5% relative humidity (RH), and the bending deformation was registered. The THM densification doubled the density, increased the modulus of elasticity and the modulus of rupture, and reduced the equilibrium moisture content and creep compliance. The results demonstrate that THM densification can be an effective method to improve the short-term and long-term performance of wood in constructions.
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