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Effects of Nano-Wollastonite Impregnation on Fire Properties of Some Thermally-Treated Solid Wood Species
Shahid Rajaee University, Iran.
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.ORCID iD: 0000-0003-0883-2306
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.ORCID iD: 0000-0002-6909-2025
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2017 (English)In: Proceedings IRG Annual Meeting, IRG/WP 17-40771, International research group on wood protection , 2017Conference paper, Published paper (Refereed)
Abstract [en]

The effects of nano-wollastonite (NW) suspension impregnation on the fire-retarding properties of heat-treated solid wood of three species (beech, poplar, fir) were studied. Heat treatment was performed at two temperatures of 180 °C and 200 °C. Impregnation was carried out at a pressure of 3 bars for 30 min. The fire properties included ignition time, glowing time, back-darkening, back-splitting, back-firing, and length and width of the burnt area. Both impregnation with NW and heat-treatment generally improved all fire-retarding properties, although not always to a significant level. As a mineral material, NW acted like a physical shield against fire penetration into the texture of wood specimens, thus improving fire properties. Moreover, the high thermal conductivity coefficient of wollastonite increased the thermal conductivity of wood, therefore preventing the accumulation of heat at the point nearest to a piloted flame and contributing to the improvement of fire properties. The chemical degradation of wood cell components caused by heat-treatment further improved the fire properties. Cluster analysis indicated the significant effect of species on fire properties. Significant R-square values were found amongst fire properties related to the spread of fire on the surface of specimens. The combination of thermal modification and impregnation with NW provides suitable fire properties for solid wood.

Place, publisher, year, edition, pages
International research group on wood protection , 2017.
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-62494OAI: oai:DiVA.org:lnu-62494DiVA, id: diva2:1088881
Conference
IRG48 Scientific Conference on Wood Protection,Ghent, Belgium, 4-8 June 2017
Note

Ej belagd 180215

Available from: 2017-04-17 Created: 2017-04-17 Last updated: 2018-02-16Bibliographically approved

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Hosseinpourpia, RezaAdamopoulos, Stergios

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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