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Communication Dans Un Congrès Année : 2011

Comparison between accelerated thermo-hydro aged wood and naturally aged wood

Résumé

The effects of aging in wood in term of physical, mechanical and chemical degradation has been studied first by Jiro Kohara [1] and more recently by Erhardt et al. [2-3] and Obataya [4]. It has been observed that similar degradation can be found in thermo-hydro (TH) treated wood [4]. The aim of this study is to compare the mechanical behavior of naturally aged and accelerate TH wood in the radial direction. A first pressure vessel with controllable temperature, oxygen pressure and relative humidity has been designed and constructed. The temperature and relative humidity range are 100 to 150 °C and 2 to 100% of RH respectively. This pressure vessel is able to maintain the conditions constant for long term processing. A second pressure vessel, using a vapor heating system, has been used to test higher temperature range (120 to 200 °C). The amount of oxygen cannot be set in this last thermal cell. Different types of thermo-hydro treated wood have been done with these machines.
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Dates et versions

hal-00796686 , version 1 (04-03-2013)

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  • HAL Id : hal-00796686 , version 1

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Julien Froidevaux, Thomas Volkmer, Joseph Gril, Marco Fioravanti, Parviz Navi. Comparison between accelerated thermo-hydro aged wood and naturally aged wood. 1st Workshop of COST Action FP0904 'Mechano-Chemical transformations of wood during Thermo-Hydro-Mechanical processing', Feb 2011, Bienne, Switzerland. ⟨hal-00796686⟩
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