百度试验法测定15年生巨尾桉木材干燥基准的初步研究
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摘要
为了掌握15年生巨尾桉(Eucalyptus grandis×E. urophylla)木材的干燥特性,制定科学合理的干燥基准,本研究利用百度试验法对15年生巨尾桉木材进行干燥特性研究。结果表明:15年生巨尾桉木材干燥速度为4级,较慢;截面变形程度较严重,为4级;初期开裂也较严重,为4级;扭曲等级为2级,内裂最为严重,达到5级。针对15年生巨尾桉木材的干燥特性,参照百度试验缺陷等级以及干燥缺陷对应的干燥条件,得出15年生巨尾桉木材干燥初期温度为38℃,干湿球温度差2～3℃,末期温度为65℃,拟定25～30 mm厚15年生巨尾桉木材的干燥基准。在实际的窑干生产中,只需对拟定的干燥基准进行适当的调整和优化,便可以得到适合于15年生巨尾桉木材的干燥基准。本研究可为巨尾桉木材的实木加工利用提供依据。
In order to know well about the drying characteristics and draw up reasonable drying schedule for15-year-old Eucalyptus grandis × E. urophylla wood,its drying characteristics were investigated based on the 100 ℃ test method. Results showed that the drying speed of 15-year-old E. grandis × E. urophylla wood was grade 4,relatively slow. The degree of cross-section deformation was serious with grade 4. The initial checks were more serious with grade 4. The degree of twist deformation was grade 2. Internal cracks were the most serious with grade 5. Aiming at its drying characteristics and based on the defect level of 100 ℃ test method and the drying condition corresponding to the drying defects,the initial and final drying temperatures of 15-year-old E. grandis × E. urophylla were 38 ℃ and 65 ℃ and the temperature difference of dry-wet ball in initial drying stage was 2～3 ℃. Drying schedule reference of 15-year-old E. grandis × E. urophylla wood with the thickness of 25～30 mm were drawn up.In the actual production of kiln drying,proper adjustment and optimization were needed to work out suitable drying schedule for 15-year-old E. grandis × E. urophylla wood.Scientific theoretical basis for improving the development and utilization of 15-year-old E. grandis × E. urophylla wood was provided.
In order to know well about the drying characteristics and draw up reasonable drying schedule for15-year-old Eucalyptus grandis × E. urophylla wood,its drying characteristics were investigated based on the 100 ℃ test method. Results showed that the drying speed of 15-year-old E. grandis × E. urophylla wood was grade 4,relatively slow. The degree of cross-section deformation was serious with grade 4. The initial checks were more serious with grade 4. The degree of twist deformation was grade 2. Internal cracks were the most serious with grade 5. Aiming at its drying characteristics and based on the defect level of 100 ℃ test method and the drying condition corresponding to the drying defects,the initial and final drying temperatures of 15-year-old E. grandis × E. urophylla were 38 ℃ and 65 ℃ and the temperature difference of dry-wet ball in initial drying stage was 2～3 ℃. Drying schedule reference of 15-year-old E. grandis × E. urophylla wood with the thickness of 25～30 mm were drawn up.In the actual production of kiln drying,proper adjustment and optimization were needed to work out suitable drying schedule for 15-year-old E. grandis × E. urophylla wood.Scientific theoretical basis for improving the development and utilization of 15-year-old E. grandis × E. urophylla wood was provided.
引文
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[14]韦鹏练,廖克波,符韵林,等.山白兰木材干燥特性研究[J].西北林学院学报,2012,27(1):229-231.
[15]杜洪双,唐朝发,李杉,等.百度试验确定干燥基准在铁木上的应用[J].木材加工机械,2003(4):19-23.
[2]杨时桐.尾巨桉木材的开发利用探讨[J].福建林业科技,2008,35(3):162-164.
[3] GB∕T 927—2009.木材物理力学试材采集方法[S].北京:中国标准出版社,2009.
[4]邱炳发,符韵林,蒙好生,等.擎天树木材干燥特性研究[J].江西农业大学学报2011,33(4):738-742.
[5]刁海林,陈健波,罗建举,等.巨尾桉干燥特性研究[J].中国农学通报2011,27(28):63-68.
[6]何清慧.木材干燥基准简易确定法:百度试验法[J].木材工业,1998,12(6):38-40.
[7]龙传文.粗皮桉木材的干燥特性与干燥基准制定[J].中南林业科技大学学报,2012,32(1):48-50.
[8]刁海林,白灵海,罗建举,等.马尾松干燥特性研究[J].湖北农业科学,2012,51(3):537-540.
[9]王喜明,贺勤,赵喜龙.桉树人工林木材干燥皱缩特性的研究[J].内蒙古农业大学学报(自然科学版),2013,34(1):123-127.
[10]左春丽,曹永建,周宇.桉树木材皱缩形成机制与调控研究进展[J].世界林业研究,2016,29(1):58-63.
[11]王喜明,王军,刘晓丽.木材皱缩评价指标的研究[J].林业科学,2000,36(3):129-132.
[12]顾炼百.木材干燥第五讲锯材干燥缺陷及预防[J].林产工业,2002,29(6):47-50.
[13]顾炼百.木材干燥第二讲锯材干燥基准的分析和选用[J].林产工业,2002,29(3):48-50.
[14]韦鹏练,廖克波,符韵林,等.山白兰木材干燥特性研究[J].西北林学院学报,2012,27(1):229-231.
[15]杜洪双,唐朝发,李杉,等.百度试验确定干燥基准在铁木上的应用[J].木材加工机械,2003(4):19-23.