Application of Neutron Radiography for Investigation of Wood
Peter Niemz
ETH Zürich, CH-8092 Zürich, Switzerland
Eberhard Lehmann , Peter Vontobel
Paul Scherrer Institut, Villigen, Switzerland
ABSTRACT Neutron radiography is a method for non-destructive testing which was applied for research in wood only very seldom in the past. It is possible by this method to investigate the distribution of water in wood in general and to study the transport processes of moisture during drying or wetting procedures. In the end, the water can be described quantitatively. A survey will be given about possibilities for applications of the neutron radiography technique and first results of topical tests will be reported. The main points are:- experimental estimation of the behaviour of wood concerning the drying and wetting behaviour (including the influence of surface conversation measures)
- to prove the penetration behaviour of wood preservers
- to prove the possibility of fungus infection
- the investigation of water ingress into gaps of wooden connections (caused by plastic deformation) which were exposed to strongly changing climates before
Even some questions of structure recognition can be solved.The described method is enabling to analyse many problems relevant to praxis which cannot be considered with other techniques without destruction or only with much less resolution.
Publication Source: Proceedings of the 12th International Symposium on Nondestructive Testing of Wood University of Western Hungary, Sopron, 13-15 September 2000, ISBN 963 7180 88 5
Publisher: University of Western Hungary, H 9400 Sopron, P.O.Box 132, FAX: +36 99 311 103
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