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Combined Densification and Thermo-Hydro-Mechanical Processing of Wood

Published online by Cambridge University Press:  31 January 2011

Parviz Navi  and
Frédéric Heger
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Abstract

The process of heating and compressing wood to improve its properties or reform it to a new shape has been known for decades. Such improvements are usually accompanied by “shape memory,” where the deformation produced by compression is not permanent, and the material recovers when re-moistened and heated. The combination of densification and a thermo-hydro-mechanical (THM) treatment can transform wood into a new material with improved mechanical properties, decreased sensitivity to moisture, increased durability, and no shape-memory effects. This article presents the principles of combined densification and THM processing, the products and experimental results, the origin of the shape-memory effect and its elimination by THM treatment, and the potential use of THM-processed densified wood in construction applications.

Keywords

construction materialsdensificationshape memorythermo-hydro-mechanical processingwood
Type
Research Article
Information
MRS Bulletin , Volume 29 , Issue 5: Construction Materials: From Innovation to Conservation , May 2004 , pp. 332 - 336
Copyright
Copyright © Materials Research Society 2004

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References

1Navi, P., Huguenin, Ph., and Girardet, F., in Proc. No. 7286: The Use of Recycled Wood and Paper in Building Applications, (Forest Products Society, Madison, WI, 1997) p.168.Google Scholar
2Kollmann, F.D. and Côté, W.A. Jr , Principles of Wood Science and Technology, Vol. I: Solid Wood (Springer-Verlag, Berlin, 1968).CrossRefGoogle Scholar
3Kollmann, F.D., Kuenzi, E.W., and Stamme, A.J., Principles of Wood Science and Technology, Vol. II: Wood Base Materials Manufacture and Products (Springer-Verlag, Berlin, 1975).CrossRefGoogle Scholar
4Norimoto, M., Ota, C., Akitsu, H.H., and Yamada, T., Wood Research 79 (1993) p.23.Google Scholar
5Ito, Y., Tanahashi, M., Kawai, M., Shigematsu, M., and Shinoda, Y., Res. Bull. Fac. Agr. Gifu Univ. 60 (1995) p.121.Google Scholar
6Ito, Y., Tanahashi, M., Shigematsu, M., Shinoda, Y., and Ohta, C., Holzforschung 52 (1998) p.211.CrossRefGoogle Scholar
7Ito, Y., Tanahashi, M., Shigematsu, M., and Shinoda, Y., Holzforschung 52 (1998) p.217.CrossRefGoogle Scholar
8Morsing, N., Densification of Wood: The Influence of Hygrothermal Treatment on Compression of Beech Perpendicular to the Grain, PhD thesis, Technical University of Denmark, 2000.Google Scholar
9Heger, F., Girardet, F., and Navi, P., in Proc. First Eur. Conf. on Wood Modification, edited by Acker, J. Van and Hill, C. (European Thematic Network for Wood Modification, Ghent, Belgium, 2003) p.33.Google Scholar
10Heger, F., Girardet, F., and Navi, P., in Proc. Second Int. Conf. of the European Society for Wood Mechanics (European Society for Wood Mechanics, Stockholm, Sweden, 2003) p.193.Google Scholar
11Navi, P. and Girardet, F., Holzforschung 54 (2000) p.287.CrossRefGoogle Scholar
12Inoue, M., Norimoto, M., Tanahashi, M., and Rowell, R.W., Wood and Fiber Sci. 25 (1993) p. 224.Google Scholar
13Back, E.L. and Salmén, N.L., Tappi J. 65 (1982) p.107.Google Scholar