Heat Treatment of Dimension Lumber and Roundwood Used for Hanok Above 170℃
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
Korean traditional buildings, Hanok, are mostly constructed with dimension lumbers and roundwoods. They are hardly kiln-dried without severe defects, thus usually air-dried from some months to an year. Dimension lumbers and roundwoods were heat-treated above 170℃ and drying defects were examined. Temperature rising curves of all dimension timbers used for this study show one or two deflection points. The time when the temperature at 37.5mm depth reached at 100℃ for spruce dimension heat-treated at 170℃ was twice longer than that heat-treated at 190℃. There were many internal checks in roundwoods of 148mmΦ, while surface checks were apparently closed at the end of heat treatment. The drying time of 300x300mm dimensions with 65mm hole was shorter than that without hole by half.
Abstract
Korean traditional buildings, Hanok, are mostly constructed with dimension lumbers and roundwoods. They are hardly kiln-dried without severe defects, thus usually air-dried from some months to an year. Dimension lumbers and roundwoods were heat-treated above 170℃ and drying defects were examined. Temperature rising curves of all dimension timbers used for this study show one or two deflection points. The time when the temperature at 37.5mm depth reached at 100℃ for spruce dimension heat-treated at 170℃ was twice longer than that heat-treated at 190℃. There were many internal checks in roundwoods of 148mmΦ, while surface checks were apparently closed at the end of heat treatment. The drying time of 300x300mm dimensions with 65mm hole was shorter than that without hole by half.
참고문헌 (8)
- Bhuiyan, M.T.R, "Changes of crystallinity in wood cellulose by heat treatment under dried and moist conditions", Journal of Wood Science, 46(6), pp.431~436 (2000)
- Cantrell, "An empirical analysis of an innovative application for an underutilized resource: Small-diameter roundwood in recreational buildings", Forest Products Journal, 54(97), pp.28~35 (2004)
- Fang, Fang, "Application of radio-frequency heating to utility poles. Part 1.Radio-frequencv", vacuum drying of roundwood, 2001, pp.51(7), 56~60
- 강호양, "국산 침엽수재의 재색변화 기술 개발", 한국가구학회지, 19(3), pp.156~162 (2008), 한국가구학회
- 강호양, "Hygroscopicity and Surface Hardness of Domestic Wood Heat-Treated at 220℃", 한국가구학회지, 19(4), pp.229~234 (2008), 한국가구학회
- Obataya, E, "Hygroscopicity of heat-treated wood I: Effects of after-treatments on the hygroscopicity of heat-treated wood", Mokuzai Gakkaishi, 46(2), pp.77~87 (2000)
- Simpson, "Method for interconverting drying and heating timers between round and square cross sections of ponderosa pine", Forest Products Journal, 55(6), pp.29~32 (2005)
- Tejada, A., "Reduction of growth stress in logs by direct heat treatment: Assessment of a commercial-scale operation", Forest Products Journal, 47(9), pp.86~93 (1997)