摘要
通过百度试验法研究小径巨尾桉(Eucalyptus grandis×E.urophylla)的干燥特性,制定巨尾桉材干燥基准,进行干燥工艺优化试验。结果表明:小径巨尾桉材初期开裂等级为3级,内裂等级为2级,截面变形等级为5级,属中等难干材;采用制定的巨尾桉材干燥基准,试件从初含水率115.13%降至8.50%的干燥周期为16.3 d,除瓦弯变形外,其他可见干燥缺陷指标均达到国家标准GB/T 6491—2012《锯材干燥质量》规定的一级要求。
The wood drying characteristics of small diameter of Eucalyptus grandis×E. urophylla were analyzed by using the 100 ℃ test method and its drying schedule was optimized, and the drying technology experiment was subsequently conducted. The results showed that the level of initial cracking, internal cracking and cross section deformation of E. grandis×E. urophylla were 3, 2 and 5, respectively, and the drying difficulty was in medium; the drying period was 16.3 days by using the optimized drying schedule when the moisture content decreased from 115.13% to 8.50%, and the quality of drying samples reached the first level of the national standard GB/T 6491—2012, except the cupping defect.
出处
《林业与环境科学》
2017年第5期16-20,共5页
Forestry and Environmental Science
基金
华南农业大学青年科技人才项目(2900-216260)
华南农业大学长江团队科研启动资金项目(4900-K16009)
国家自然科学基金项目"竹粉表面修饰对高填充木塑结构-性能的调控机理研究"(31600459)
关键词
巨尾桉
干燥工艺
百度试验法
干燥特性
Eucalyptus grandis×E. urophylla
drying technology
100℃ test method
drying characteristics
