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Abstract
Evaluation of wood decay is often prone to subjective assessment. Standard rating scales are based on human perception of decay, often in addition to weight loss measurements. Especially the assessment of graveyard specimens or other long term testing material that has to be monitored regularly on a non-destructive basis, is challenging. In this paper two techniques are presented that can deliver extra insight. The first technique is based on the analysis of the resonance frequencies of the material. It is very fast and only minimal sample manipulation is required. Instantaneously, an approximation of the modulus of elasticity (MOE) and damping are obtained that can be followed during degradation. The technique is applicable in the field. The second method requires an X-ray tomography scanner, but enables a three dimensional view on the internal structure of the sample and accompanying degradation. It is not applicable in the field but can give a very interesting view on possible degradation patterns. Both methods can not only assist in non-destructive assessment, but can possibly best serve as early decay detection techniques and give more insight into the rate and modes of degradation.
Keywords
non-destructive, decay, X-ray tomography, damping, resonance frequencies

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Chicago
Van den Bulcke, Jan, Imke De Windt, Nele Defoirdt, and Joris Van Acker. 2011. “Non-destructive Evaluation of Wood Decay.” In International Research Group on Wood Protection, 42nd Annual Meeting, Proceedings. Stockholm, Sweden: International Research Group on Wood Protection.
APA
Van den Bulcke, J., De Windt, I., Defoirdt, N., & Van Acker, J. (2011). Non-destructive evaluation of wood decay. International Research Group on Wood Protection, 42nd Annual meeting, Proceedings. Presented at the 42nd Annual meeting of the International Research Group on Wood Protection (IRG/WP), Stockholm, Sweden: International Research Group on Wood Protection.
Vancouver
1.
Van den Bulcke J, De Windt I, Defoirdt N, Van Acker J. Non-destructive evaluation of wood decay. International Research Group on Wood Protection, 42nd Annual meeting, Proceedings. Stockholm, Sweden: International Research Group on Wood Protection; 2011.
MLA
Van den Bulcke, Jan, Imke De Windt, Nele Defoirdt, et al. “Non-destructive Evaluation of Wood Decay.” International Research Group on Wood Protection, 42nd Annual Meeting, Proceedings. Stockholm, Sweden: International Research Group on Wood Protection, 2011. Print.
@inproceedings{1891191,
  abstract     = {Evaluation of wood decay is often prone to subjective assessment. Standard rating scales are based on human perception of decay, often in addition to weight loss measurements. Especially the assessment of graveyard specimens or other long term testing material that has to be monitored regularly on a non-destructive basis, is challenging. In this paper two techniques are presented that can deliver extra insight. The first technique is based on the analysis of the resonance frequencies of the material. It is very fast and only minimal sample manipulation is required. Instantaneously, an approximation of the modulus of elasticity (MOE) and damping are obtained that can be followed during degradation. The technique is applicable in the field. The second method requires an X-ray tomography scanner, but enables a three dimensional view on the internal structure of the sample and accompanying degradation. It is not applicable in the field but can give a very interesting view on possible degradation patterns. Both methods can not only assist in non-destructive assessment, but can possibly best serve as early decay detection techniques and give more insight into the rate and modes of degradation.},
  articleno    = {IRG/WP 11-20479},
  author       = {Van den Bulcke, Jan and De Windt, Imke and Defoirdt, Nele and Van Acker, Joris},
  booktitle    = {International Research Group on Wood Protection, 42nd Annual meeting, Proceedings},
  keyword      = {non-destructive,decay,X-ray tomography,damping,resonance frequencies},
  language     = {eng},
  location     = {Queenstown, New Zealand},
  pages        = {11},
  publisher    = {International Research Group on Wood Protection},
  title        = {Non-destructive evaluation of wood decay},
  year         = {2011},
}