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http://dx.doi.org/10.5658/WOOD.2012.40.1.44

Air Circulating Oven-drying Characteristics of Hollowed Round-post for Korean Main Conifer Species - Part 1: For Japanese larch hollowed round-post -  

Lee, Nam-Ho (College of Agriculture & Life Sciences, Chonbuk National University)
Zhao, Xue-Feng (Department of Wood Science & Engineering, Beihua University)
Shin, Ik-Hyun (College of Agriculture & Life Sciences, Chonbuk National University)
Lee, Chang-Jin (College of Agriculture & Life Sciences, Chonbuk National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.40, no.1, 2012 , pp. 44-52 More about this Journal
Abstract
This study examined the effects of the drying rate, temperature distribution and vapor pressure on the surface checks occurring during the air circulating oven-drying of hollowed short Japanese larch (Larix Kaemferi C.) round posts treated with coating (CO) and vapor-dam (VD). The hollowed round posts could be dried from the green condition to a moisture content of approximately 8% in 72 to 144 hours. The temperature in the hole was higher than that inside of wood for Control and VD specimens, while VD specimen showed opposite distribution. The vapor pressure inside the wood was higher than that in the hole for the CO and VD specimens during hole drying stage. There were few surface checks found in the specimens but the number increased in order the of CO, VD and Control specimens.
Keywords
hollowed round post; coating treatment; vapor-dam treatment; distribution of temperature and vapor pressure; drying rate; checking;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Helsing, G. and R. D. Graham. 1976. Saw kerfs reduce checking and prevent internal decay in pressure-treated Douglas-fir poles. Holzforschung 30(6): 184-186.   DOI
2 Kanagawa, Y. 1989. Resin distribution in lumber dried by vacuum drying combined with radio- frequency. Proc. of the IUFRO International Wood Drying Symposium. Seatle, Washington, USA 158-163.
3 Lee, N. H. and J. Y. Luo. 2002. Effect of steam explosion treatments on drying rates and moisture distributions during radio-frequency/vacuum drying of larch pillar combined with a longitudinal kerf. Journal of Wood Science 48: 270-276.   DOI   ScienceOn
4 Pavlo B. and P. Niemz. 2003. Effect of high temperature on the change in color, dimensional stabilityand mechanical properties of spruce [J]. Holzforschung 57: 539-546.   DOI
5 Ruddick, J. N. R. and N. A. Ross. 1979. Effect of kerfing on checking of untreated Douglas fir pole sections. Forest Products Journal 29(9): 27-30.
6 Yoshida, T., T. Hashizume, and N. Fujimoto. 2000. High-temperature drying characteristics on boxedheart square timber of karamatsu and sugi-Influences of high temperature conditions with low humidity on drying properties. Mokuzai Kogyo 55(8): 357-362 (in Japanese).
7 최준호, 이남호. 2002. 원주슬라이스법에 의한 원반내접선방향 변형율의 방사방향 분포 평가. 전북대학교 석사학위논문 6-11.
8 이남호, Chengyuan Li, 최준호. 2003. 원주상 슬라이스의 오-븐건조법에 의한 함수율의 원반내 방사방향 분포 추이 평가(I). 목재공학 31(1): 10-15.   과학기술학회마을
9 Evans, P. D., R. Wingate-Hill, and S. C. Barry. 2000. The effects of different kerfing and center-boring treatments on the checking of ACQ treated pine posts exposed to the weather. Forest Products Journal 50(2): 59-64.
10 Avramidis, S., F. Liu, and B. J. Neilson. 1994. Radio-frequency/vacuum drying of softwood: drying of thick western red cedar with constant electrode voltage. Forest Products Journal 44(1): 41-47.
11 Harris, R. A. and M. A. Taras. 1984. Comparison of moisture content distribution, stress distribution and shrinkage of red oak lumber dried by a radio- frequency/vacuum drying process and a conventional kiln. Forest Products Journal 34(1): 44-54.