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Published VersionCC BY V4.0, Open Access
Journal article
Experimental study on the factors affecting smouldering behaviour of CCA-treated wood
Fire Safety Journal, Vol.141, pp.1-10
2023
Abstract
Waterborne chromated copper arsenate (CCA) is a highly effective, widely used wood preservative. While it does not appear to markedly alter the flaming behaviour of treated wood, there are significant concerns regarding post-fire smouldering. Our understanding of the mechanisms and factors affecting smouldering behaviour is currently insufficiently developed. This study used a multiscale approach to better understand smouldering in slash pine treated to different CCA retentions and investigated reaction kinetics through thermogravimetric analysis (TGA) in addition to Cone Calorimeter smouldering tests. Derivative thermogravimetry (DTG) showed that the temperatures at the onset of pyrolysis and oxidation, and where the maximum rate of decomposition occurred were both lowered by CCA treatment, and effects became more pronounced as CCA retention increased. Bench-scale smouldering tests showed that the smouldering mass loss rate increased with higher CCA retention, lower wood density, and prolonged heat exposure. Smouldering mode changed from a steady to an unsteady pattern as CCA retentions decreased to a threshold from combined pyrolysis and oxidation to isolated char-to-ash oxidation. Once initiated, the reaction can be self-sustaining until all the mass has been consumed regardless of the initial smouldering rate.
Details
- Title
- Experimental study on the factors affecting smouldering behaviour of CCA-treated wood
- Authors
- Wenxuan Wu (Corresponding Author) - The University of QueenslandLuis Yermán (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design LifeJuan P Hidalgo (Author) - The University of QueenslandJeffrey Morrell (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design LifeFelix Wiesner (Author) - University of British Columbia
- Publication details
- Fire Safety Journal, Vol.141, pp.1-10
- Publisher
- Elsevier Ltd
- Date published
- 2023
- DOI
- 10.1016/j.firesaf.2023.104003
- ISSN
- 1873-7226; 0379-7112
- Copyright note
- This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
- Grant note
- National Centre for Timber Durability and Design Life Forest and Wood Products Australia
- Organisation Unit
- University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life
- Language
- English
- Record Identifier
- 99968896502621
- Output Type
- Journal article
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- Domestic collaboration
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- Web Of Science research areas
- Engineering, Civil
- Materials Science, Multidisciplinary
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