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. 2021 Oct 23;21(21):7033.
doi: 10.3390/s21217033.

Wood Moisture-Content Measurement Accuracy of Impregnated and Nonimpregnated Wood

Jacek Barański  1 , Aleksandra Suchta  2 , Sylwia Barańska  3 , Ivan Klement  4 , Tatiana Vilkovská  4 , Peter Vilkovský  4
Affiliations

Wood Moisture-Content Measurement Accuracy of Impregnated and Nonimpregnated Wood

Jacek Barański et al. Sensors (Basel). .

Abstract

The influence of the impregnation process of pine wood (Pinus sylvestris L.) samples on the electrical resistance changes and the moisture-content measurement accuracy is presented in this paper. In this study, the resistances of impregnated and nonimpregnated green pine timber harvested from northern Poland were compared. An impregnation method based on a vacuum-pressure chamber was used. Copper salts were applied as the impregnated solutions. The obtained results of the electrical resistance comparison showed a dependence of wood resistance on the moisture content. Higher conductivity occurred in impregnated wood samples filled with copper salt compared with wood samples without impregnation. Noticeable differences in the electrical resistance values were observed when the wood moisture content was significantly above the Fibre Saturation Point (FSP).

Keywords: impregnated wood; moisture content; moisture meter resistance; pine wood; wood drying; wood moisture content; wood resistance.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 8
Figure 8
Measurement differences of the nonimpregnated pine wood MC as a result of the moisture-content measurement method.
Figure 9
Figure 9
Measurement differences of the impregnated pine wood moisture content (MC) as a result of the moisture-content measurement method.
Figure 1
Figure 1
The course of phases or pressure changes of the impregnation process preformed in the autoclave.
Figure 2
Figure 2
Dimensions of wood samples prepared for an experiment: (a) nonimpregnated wood, (b) impregnated wood. The wood samples taken for the initial wood MC determination (applying the gravimetric method).
Figure 3
Figure 3
Types of growth-ring orientations (a) within the obtained boards: (b) tangential, (c) axial, (d) radial.
Figure 4
Figure 4
The view of wood samples prepared for experiments: (a) nonimpregnated, (b) impregnated.
Figure 5
Figure 5
Schematic diagram of wood-resistance measurement system.
Figure 6
Figure 6
Resistance characteristics of impregnated and nonimpregnated pine wood.
Figure 7
Figure 7
Measurement differences of the pine wood MC as a result of the wood impregnation process.
Figure 10
Figure 10
The influence of wood impregnation process and the measurement method on the wood moisture-content value.
Figure 11
Figure 11
The wood impregnation process impact on the moisture content and resistance values during drying processes: (a) impregnated wood, (b) nonimpregnated green timber.
Figure 12
Figure 12
The measurement method impact on the wood resistance during drying process: (a) resistance method, (b) gravimetric method.
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References

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