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서현정 ( Hyun Jeong Seo ),강미란 ( Mee Ran Kang ),손동원 ( Dong Won Son ) 한국목재공학회 2015 목재공학 Vol.43 No.4
The aim of this study is to analyze the combustion and thermal properties in order to establish baseline data for the fire safety evaluation of domestic timbers. The combustion properties such as heat release rate, total heat release, gas yield, and mass loss were analyzed by the method of cone calorimeter test and thermogravimetry (TGA). Thermal decomposition temperatures of the specimens by TGA were recorded as 359.83℃ for White pine, 359.80℃ for Red-Leaved Hornbeam, 363.14℃ for Carolina poplar, 358.59℃ for Konara oak, and 362.11℃ Sargent cherry. Red-Leaved Hornbeam showed the highest value of heat release rate, but, Carolina poplar wood showed the lowest value. In case of the total heat release, Red-Leaved Hornbeam wood showed the highest value and Carolina poplar wood showed the lowest one. The gas analysis results showed that Sargent cherry wood had the lowest value of 0.021, and Konara oak had the highest at 0.031 in the CO/CO2. The minimum value of mass reduction was recorded as 87.57% for Sargent cherry, but, on the other hand, it was 95.03% for Konara oak. There was a correlation between the gas generation of CO and CO2, and combustion behavior of woods. These results are expected to be usful for providing a fundamental guideline with the fire safety of wood use in interior applications.
손동원 ( Dong Won Son ),강미란 ( Mee Ran Kang ) 한국목재공학회 2015 목재공학 Vol.43 No.1
The aim of this paper is to analyze combustion characteristics of treated woods by fire retardants which are prepared by several borate and phosphate compound solutions. The combustion characteristics for flame retardant treated wood were carried out using thermogravimetric analysis (TGA) to measure their combustion heat and flame retardant test using cone-calorimeter. The result of TGA and flame retardant test showed that single chemical solution affected the char forming and flame delay. The mixed retardants solutions was believed to be related to the efficacy and property of single chemical. The retention value and concentration of the retardants also affected the performance of fire retardant treated woods. The fire retardants FR1 and FR2 satisfied the requirement of The 3 Grade of Korean building codes.
손동원 ( Dong Won Son ),강미란 ( Mee Ran Kang ),이동흡 ( Dong Heub Lee ),박상범 ( Sang Bum Park ) 한국목재공학회 2013 목재공학 Vol.41 No.6
This study evaluated the ability of white and brown rot fungi to becompose fire retardant-treated wood by measuring mass loss. Anti efficacy of FRT against sapstain and mold fungi was evaluated. Wood was treated with liquid sodium silicate and boric acid, ammonium borate, di-ammonium phosphate. Retardant treated wood was then subjected to fungal decay resistance tests performed according to KS standard method using a brown-rot fungus. Fomitopsis palustris and white rot fungus Trametes versicolor; Aspergillus niger, Penicillium funiculosum, Rhizopus nigricans, Aureobasidium pullulans, Tricoderma virede fungi were used anti-sapstain and mold test. Boron and phosphorus chemicals used in this study increased the resistance of fire retardant treated wood against both fungal attack. Anti mold and sapstain efficacy of the fire retardant treated wood was excellent but there were difference depend on mold. After the liquid sodium silicate treatment, the second chemical treatment process could lead chemical fixation into wood, which effects decay resistance.
서현정 ( Hyun Jeong Seo ),강미란 ( Mee Ran Kang ),박정은 ( Jung Eun Park ),손동원 ( Dong Won Son ) 한국목재공학회 2016 목재공학 Vol.44 No.1
The purpose of this study is to analyze the combustion and thermal properties in order to establish baseline data for the fire safety evaluation of imported wood. The combustion properties such as heat release rate, total heat release, gas yield, and mass loss were analyzed by the method of cone calorimeter test according to KS F ISO 5660-1 and thermogravimetric analysis (TGA). Analyzed species are five kinds of species as Merbau, Mempening, Garo Garo, Malas, and Dillenia. The heat released rate values showed the highest value of Malas as 375.52 kW/m2, and Dillenia showed the lowest value as 133.30 kW/m2. The data values were confirmed in the following order: Malas > Mempening > Garo Garo > Merbau > Dillenia. In case of the total heat release, it was measured in the following order: Mempening > Malas > Garo Garo > Merbau > Dillenia. The gas analysis results were that Dillenia showed the highest value of 0.034. Also, Mempening and Malas showed the lowest at 0.020 in the CO/CO2. Min of mass reduction was shown as 74.79% Sargent cherry, on the other hand, Malas had a 83.52%. It showed a correlation between and of the CO and CO2 generation and combustion characteristics of wood. The thermal decomposition temperature of the wood in the TGA were as follow that Merbau 348.07℃, Mempening 367.57℃, Garo Garo 350.59℃, Malas 352.41℃, Dillenia 364.33℃. The aim of this study is to determine the combustion properties of imported wood according to ISO 5660-1. And, based on the results of this study, we would proceed with further research for improving the fire safety of wood for construction.