Artificial Weathering of Contact-Charred Wood-The Effect of Modification Duration, Wood Species and Material Density

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F22%3A43921737" target="_blank" >RIV/62156489:43410/22:43921737 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/ma15113951" target="_blank" >https://doi.org/10.3390/ma15113951</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma15113951" target="_blank" >10.3390/ma15113951</a>

Result language
angličtina
Original language name
Artificial Weathering of Contact-Charred Wood-The Effect of Modification Duration, Wood Species and Material Density
Original language description
A relevant issue with charred exteriors is the inconsistency of the result, which makes service life predictions complicated. Contact charring enables the creation of a very evenly modified surface with accurate control of temperature and modification time, but the weathering properties are questionable. This paper evaluated the effect of the modification time relative to char layer and transition zone thickness, wood species and material density in an artificial weathering test. The results revealed higher color stability in connection to longer modification time, but also an increase in the cracked surface area. Cracking was heavily dependent on the modification regime and increased with increasing char and transition zone thicknesses. Dense spruce had the highest color stability with the most severe modification regime, but char layer thickness varied more than on other wood types. Furthermore, species-dependent cracking patterns affected the final result as the small-scale flaking experienced by birch increased the washing off of char. It is likely an even higher modification temperature with a shorter modification time is needed to produce sufficient weathering resistance suitable for exterior uses.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/GJ19-25171Y" target="_blank" >GJ19-25171Y: Multi-scale Hygro-thermo-mechanical Behavior of Modified Wood-based Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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