摘要
对黄毛青冈、高山栲、滇石栎和栓皮栎等四种硬阔叶树材的构造、密度、全干缩率、弦、径向干缩变化、用百度法和气干等进行了观察和试验。结果表明四种木材导管内含有丰富或较多的侵填体,密度甚大,全干缩率大,弦、径向干缩比差异也大,水分传导性差,干燥速度缓慢,干燥时易发生表裂、内裂、翘弯和扭曲等现象,属难干材。通过试验,提出了克服干燥缺陷的一些措施,为制定四种木材干燥工艺提供了依据。
By air drying and by the Japanese 'one hundred degree research method', the drying characteristics of four species of hard-wood including CyclobalanIopsis delavayi, Catanopsis delavayi, Lithocarpus dealbatus and Quercus variabilis were studied. The results indicated that because of the low rates of drying and easy occured drying defects, such as the surface check, the honeycomb check, the warping and twisting, the wood of these four species are hard to dry. The reasons include high tyloses contents in vessels, high wood density, uneven wood structures, high volumetric shrinkage values, high ratio of tangential to radial shrinkage and poor water permeabilities for these four kinds of wood. Suggestions were made to overcome these drying defects above mentioned and the drying schedules of these four species were built.
出处
《木材工业》
北大核心
1992年第4期28-34,共7页
China Wood Industry
关键词
硬阔叶树材
干燥特性
木材
干燥
Hard—Wood
Drying characteristics
Shrinkage properties
Japanese method
Air drying
