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Effects of heat-treatment and nano-wollastonite impregnation on fire properties of solid wood
Shahid Rajee Teacher Training 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
Shahid Rajee Teacher Training University, Iran.
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2016 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 11, no 4, 8953-8967 p.Article in journal (Refereed) Published
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
2016. Vol. 11, no 4, 8953-8967 p.
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-56449DOI: 10.15376/biores.11.4.8953-8967ISI: 000391801300063OAI: oai:DiVA.org:lnu-56449DiVA: diva2:967676
Available from: 2016-09-09 Created: 2016-09-09 Last updated: 2017-02-16Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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