<正>研究了常压、汽蒸处理对青冈栎(Cyclobalanopsisspp.)干缩系数、气体渗透性及含水率的影响。结果表明:青冈栎的径向、弦向和体积干缩系数在汽蒸处理5h后稍有增加;汽蒸处理后的顺纹渗透性为处理前的2倍,处理前后的横纹渗透性基本不变,试材含水率降低5%左右。

Oak(Cyclobalanopsis spp.)is widely distributed in Yunnan province of China,and it is also an excellent raw material for decoration and highgrade furniture.But up to now,it is not widely used because it is hard to be dried.Steaming of lumber has been proposed as an aid in drying for decades.In this paper,the effects of amorphous steaming on the shrinkage coefficient,air permeability and initial moisture content(MC) of oak were investigated.The air permeability of wood sample was measured by rising water displacement method.The results show that five hours of steaming caused a drop of approximately 5% in initial MC,a increase of about twice in longitudinal air permeability,a minor increased shrinkage coefficient,but the effects of steaming on transverse air permeability were not significant,when compared to unsteamed oak samples.