Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood
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 fo...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2016-09-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8953_Soltani_Heat_Treatment_Nano_Wollastonite |
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| author | Abolfazl Soltani Reza Hosseinpourpia Stergios Adamopoulos Hamid Reza Taghiyari Ehsan Ghaffari |
| author_facet | Abolfazl Soltani Reza Hosseinpourpia Stergios Adamopoulos Hamid Reza Taghiyari Ehsan Ghaffari |
| author_sort | Abolfazl Soltani |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T04:57:59Z |
| format | Article |
| id | doaj.art-49dfa3fd2afd49b99359fd9771041638 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-13T04:57:59Z |
| publishDate | 2016-09-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-49dfa3fd2afd49b99359fd97710416382022-12-22T03:01:25ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-09-011148953896710.15376/biores.11.4.8953-8967Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid WoodAbolfazl Soltani0Reza Hosseinpourpia1Stergios Adamopoulos2Hamid Reza Taghiyari3Ehsan Ghaffari4Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran; Iran, Islamic Republic OfDepartment of Forestry and Wood Technology, Linnaeus University, Lückligs plats 1, 351 95; SwedenDepartment of Forestry and Wood Technology, Linnaeus University, Lückligs plats 1, 351 95; SwedenFaculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran; Iran, Islamic Republic OfShahid Rajaee Teacher Training University; Iran, Islamic Republic OfThe 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.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8953_Soltani_Heat_Treatment_Nano_WollastoniteMineral materialsSolid woodFire-retarding propertiesNano-fiberthermal conductivityWollastonite |
| spellingShingle | Abolfazl Soltani Reza Hosseinpourpia Stergios Adamopoulos Hamid Reza Taghiyari Ehsan Ghaffari Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood BioResources Mineral materials Solid wood Fire-retarding properties Nano-fiber thermal conductivity Wollastonite |
| title | Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood |
| title_full | Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood |
| title_fullStr | Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood |
| title_full_unstemmed | Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood |
| title_short | Effects of Heat-Treatment and Nano-Wollastonite Impregnation on Fire Properties of Solid Wood |
| title_sort | effects of heat treatment and nano wollastonite impregnation on fire properties of solid wood |
| topic | Mineral materials Solid wood Fire-retarding properties Nano-fiber thermal conductivity Wollastonite |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_4_8953_Soltani_Heat_Treatment_Nano_Wollastonite |
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