杉木生材含水率分布及其对气干的影响

详细信息    查看全文 | 推荐本文 |

英文篇名：Study on Distribution of Moisture Content of Green Sawn Chinese Fir Lumber and Its Effect on Air Drying 作者：江京辉 ; 李伯涛 ; 周凡 ; 付宗营 ; 高鑫 ; 周永东 英文作者：JIANG Jing-hui;LI Bo-tao;ZHOU Fan;FU Zong-ying;GAO Xin;ZHOU Yong-dong;Research Institute of Wood Industry, Chinese Academy of Forestry; 关键词：杉木 ; 生材状态 ; 锯材 ; 含水率 ; 气干 英文关键词：Chinese fir;;Green wood;;Lumber;;Moisture content;;Air drying 中文刊名：LCGY 英文刊名：China Forest Products Industry 机构：中国林业科学研究院木材工业研究所; 出版日期：2019-01-06 出版单位：林产工业 年：2019 期：v.46;No.281 基金：“十三五”国家重点研发计划“木材节能备料与质量控制技术研究”课题(2016YFD0600701) 语种：中文; 页：LCGY201901007 页数：5 CN：01 ISSN：11-1874/S 分类号：29-33

摘要

以人工林杉木为研究对象,研究生材状态下不同厚度锯材含水率的差异,比较含髓心、钝棱与其他类型等3类锯材的含水率差异,建立生长轮宽度与锯材含水率的关系,分析生材状态含水率对锯材气干周期的影响。研究结果显示,25mm和40 mm的锯材含水率差异极显著;含髓心锯材含水率最低,其次是其他类的,最大是含钝棱锯材;随着生长轮宽度减少,锯材含水率增大;生长轮宽度为4 mm时,是生材含水率分界线,即当生长轮平均宽度小于和不小于4.0 mm时,锯材含水率差异极显著;25 mm和40 mm厚不同含水率锯材各2组气干至含水率25%,低含水率锯材较高含水率的气干周期分别缩短57%和66%。
        In this paper, the plantation Chinese fir wood was subjected, the moisture content(MC) difference of green lumber with different thickness was studied, the moisture content difference 3 kinds of lumber(pith contained type, wane type and other types) was compared, the relationship between growth wheel width and sawn moisture content was built, and the influence of moisture content of raw material state on the dry period of sawn timber was analyzed. The results showed that: there were significant differences in the MC of 25 mm and 40 mm lumber. The max MC lumber was wane lumber, the second was other type of lumber, and the last one was pith of lumber. With the decrease of the growth ring width, the lumber MC increases. There was a significant difference in MC of growth ring more than 4 mm and no less than 4 mm of lumber. When the high and low MC of 25 mm and 40 mm lumber were reduced to 25%, the air drying time were shortened by 57% and 66%, respectively.

引文

[1]鲍甫成,江泽慧,等.中国主要人工林树木木材性质[M].北京:中国林业出版社, 1998:9.
    [2]刘盛全,储茵,张育才,等.长江滩地69杨生材含水率株内变异规律的研究[J].安徽农业大学学报,1999,26(4):384-387.
    [3]黎小波,张钰雯,符韵林.香梓楠树皮率、生材含水率及木材密度研究[J].陕西林业科技, 2014(4):1-4.
    [4]樊吉尤,韦鹏练,卓宇,等.刨花润楠树皮率、生材含水率及木材密度研究[J].安徽农业科学, 2011, 39(9):5278-5280, 5296.
    [5]严晓红,潘彪,施建中,等.海岸防风林中山杉木材生长特性[J].林业科技开发, 2010, 24(6):72-74.
    [6]聂永雄,刘晓玲,张荣,等.土贡松树皮率、生材含水率及木材密度研究[J].陕西林业科技, 2016(6):27-31.
    [7]张轶中.杉木生材含水率变异规律初探[J].西南林学院学报,1987(2):61-65.
    [8]王飞,刘君良,吕文华.增强-阻燃改性人工林杉木的性能研究[J].林产工业, 2017,44(6):7-11.
    [9]李晓玲,高瑞清,周永东.四种桉树人工林木材气干特性研究[J].木材工业, 2004, 18(5):15-17, 20.
    [10]张璧光,周永东,伊松林.浅析传统木材干燥实现节能减排的途径[J].林产工业, 2014, 41(5):3-6.
    [11]GB/T 1931—2009木材含水率测定方法[S].北京:中国标准出版社, 2009.
    [12]LY/T 1069—2012锯材气干工艺规程[S].北京:中国标准出版社, 2012.
    [13]Jiang J H, Lu J X, Ren H Q, et al. Effect of growth ring width, pith and visual grade on bending properties of Chinese fir plantation dimension lumber[J]. European Journal of Wood and Wood Products, 2012, 70(1-3):119-123.
    [14]Jiang J H, Lu J X, Ren H Q, et al. Predicting the flexural properties ofChinese fir(Cunninghamialanceolata)plantation dimension lumber from growth ring width[J]. Journal of Wood Science, 2010, 56(1):15-18.
    [15]朱政贤.木材干燥(第二版)[M].北京:中国林业出版社, 1992:262-263.