<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The experiment evaluate the possibility of using non-destructive measure techniques of the mechanical properties of wood using ultrasonic to determine the initial stages of degradation by biotic and abiotic factors in the outdoors without ground contact. Nine tree species were tested: spruce, pine, Douglas fir, larch, oak, black locust, maple, poplar and alder. Test specimens were exposed to the exterior according to EN 927-3, Prague-Suchdol in the Czech Republic. Measuring changes in velocity of ultrasonic using the apparatus Ultrasonic Timer and moisture content change were measured after 1, 2, 3, 4 and 6 months. Certain ways of detecting the initial stages of damage have been demonstrated to trees oak, larch and spruce. The initial stages of damage by molds at non-durable maple, alder and poplar had not a clear impact on the decrease in the speed of ultrasonic, as well as hairline surface cracks at the Douglas fir.</p>
</abstract>

The experiment evaluate the possibility of using non-destructive measure techniques of the mechanical properties of wood using ultrasonic to determine the initial stages of degradation by biotic and abiotic factors in the outdoors without ground contact. Nine tree species were tested: spruce, pine, Douglas fir, larch, oak, black locust, maple, poplar and alder. Test specimens were exposed to the exterior according to EN 927-3, Prague-Suchdol in the Czech Republic. Measuring changes in velocity of ultrasonic using the apparatus Ultrasonic Timer and moisture content change were measured after 1, 2, 3, 4 and 6 months. Certain ways of detecting the initial stages of damage have been demonstrated to trees oak, larch and spruce. The initial stages of damage by molds at non-durable maple, alder and poplar had not a clear impact on the decrease in the speed of ultrasonic, as well as hairline surface cracks at the Douglas fir.

Ultrasonic technique for evaluation of initial stadium of wood degradation in exterior conditions without ground contact

Czech University of Life Sciences Prague, Faculty of Forestry and Wood Sciences, Kamýcká 129, CZ – 165 21 Prague 6 – Suchdol,

Central European Forestry Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The experiment evaluate the possibility of using non-destructive measure techniques of the mechanical properties of wood using ultrasonic to determine the...

Ultrasonic technique for evaluation of initial stadium of wood degradation in exterior conditions without ground contact

Online veröffentlicht: 08. Dez. 2016

Seitenbereich: 164 - 168

DOI: https://doi.org/10.1515/forj-2016-0016

Schlüsselwörter
wood, exterior, biotic and abiotic degradation, detection, ultrasonic velocity

© 2016 Miloš Pánek et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Ultrasonic technique for evaluation of initial stadium of wood degradation in exterior conditions without ground contact

Online veröffentlicht: 08. Dez. 2016

Seitenbereich: 164 - 168

DOI: https://doi.org/10.1515/forj-2016-0016

Schlüsselwörterwood, exterior, biotic and abiotic degradation, detection, ultrasonic velocity

© 2016 Miloš Pánek et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
wood, exterior, biotic and abiotic degradation, detection, ultrasonic velocity