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Physical properties and termite durability of maritime pine Pinus pinaster Ait., heat-treated under vacuum pressure

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Abstract

An original heat treatment performed under vacuum pressure was investigated. Maritime pine samples were treated at six different temperatures: 140, 160, 180, 200, 230 and 260°C. The physical and mechanical consequences, i.e. bending strength (MOR), modulus of elasticity (MOE), hygroscopic behaviour, equilibrium moisture contents and anti-swelling efficiency (ASE) were studied. A no-choice feeding test according to the NF EN 117 standard was achieved. Temperatures up to 200°C had no significant effect on wood properties. However, at 230 and 260°C, the decrease in MOR was severe, reaching 42.5 and 62.5%, respectively. Whatever the treatment conditions, wood samples were still highly degraded by termites, revealing no increase in their durability.

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Acknowledgments

The authors wish to thank INRA (Institut National de la Recherche Agronomique) and the Région Aquitaine for funding, as well as Dr Marie-France Thévenon and Mrs Christine Baudassé for providing termites and for their precious advices. Dr. Nicola Hewitt is fully thanked for English revision. Thanks also to Mr. Ghislain Simo for his help and research work in heat treatment processes.

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Correspondence to Thibaud Surini.

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Surini, T., Charrier, F., Malvestio, J. et al. Physical properties and termite durability of maritime pine Pinus pinaster Ait., heat-treated under vacuum pressure. Wood Sci Technol 46, 487–501 (2012). https://doi.org/10.1007/s00226-011-0421-3

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