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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年03期

页码:

30-39

栏目:

建筑材料

出版日期:

2023-05-20

文章信息/Info

Title:

Research on mechanical properties and decay resistance mechanism of bamboo scrimber under accelerated decay environment

文章编号:

1673-2049(2023)03-0030-10

作者:

储 炜¹,徐 明¹,许 琪¹,李 婷¹,崔兆彦²

(1. 东南大学 混凝土及预应力混凝土结构教育部重点实验室,江苏 南京 211189; 2. 南京林业大学 机电产品包装生物质材料国家地方联合工程研究中心,江苏 南京 210037)

Author(s):

CHU Wei¹, XU Ming¹, XU Qi¹, LI Ting¹, CUI Zhaoyan²

(1. Key Laboratory of C&PC Structures, Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China; 2. National-provincial Joint Engineering Research Center of Electromechanical Product Packaging, Nanjing Forestry University, Nanjing 210037, Jiangsu, China)

关键词:

重组竹;  失重率;  力学性能;  扫描电镜;  耐腐性

Keywords:

bamboo scrimber;  weight loss rate;  mechanical property;  scanning electron microscopy;  decay resistance

分类号:

TU531.3

DOI:

10.19815/j.jace.2021.10099

文献标志码:

A

摘要:

重组竹作为一种新型工程材料,有着良好的力学性能,为了对重组竹的耐腐性能展开定量评价,利用目测分析、失重率分析、力学性能分析以及扫描电镜分析等方法,进行重组竹耐腐性试验研究。结果表明:重组竹在褐腐菌与白腐菌84 d的作用下,仅表面有轻微腐朽,褐腐菌和白腐菌腐朽试件失重率相差不大,且均小于10%,表明重组竹属于Ⅰ级耐腐; 褐腐菌试样的抗弯弹性模量M_E、抗弯强度M_R分别下降5.17%、8.17%,而抗压强度U基本不变,白腐菌试样的M_E、M_R、U下降幅度分别为10.56%、13%、0.45%,远小于木材; 通过扫描电镜分析,相比毛竹在经历84 d腐朽后,其薄壁细胞中布满菌丝,细胞壁上出现大量孔洞,重组竹表面下2 mm以内的薄壁细胞中仅有少量菌丝,并且在84 d试验内均未造成细胞壁的破坏; 竹材内部可以满足木腐菌生存的条件,但在疏解、炭化、浸胶、重组的过程中,吸水性能降低,限制了真菌生长的水分条件,阻碍了木腐菌侵入重组竹内部,另外酚醛树脂具有一定的抑菌性,使得重组竹成为耐腐性强的材料。

Abstract:

Bamboo scrimber is a new type of engineering material, which has good mechanical properties. To quantitatively evaluate the decay resistance of the bamboo scrimber, methods including visual analysis, weight loss rate analysis, mechanical property analysis, and scanning electron microscopy analysis were used in the study of the decay resistance of the bamboo scrimber. The results show that after the 84 d corrosion of the brown-rot fungi and white-rot fungi, only slight decay on the surface of the bamboo scrimber samples occurred. The brown-rot and white-rot have little difference in weight loss rate, and both are less than 10%, which shows that the bamboo scrimber belong to grade Ⅰ decay resistance. The elastic modulus of bending M_E and bending strength M_R of brown-rot specimens decrease by 5.17% and 8.17% respectively, while the compressive strength U remains basically unchanged. By contrast, the M_E, M_R and U of the white-rot specimens decrease 10.56%、13% and 0.45% respectively, which is far less than that of wood. Scanning electron microscopy analysis shows that after 84 d decay, the thin-walled cells of moso bamboo are filled with hyphae and numerous pores appeared on the cell walls, while only a small amount of hyphae present in the thin-walled cells within 2 mm of the surface of the bamboo scrimber, and no damage to the cell walls occurs during the 84 d experiment. Although the conditions for survival of wood-decaying fungi can be met inside bamboo, the reduction in water absorption during processing such as disintegration, carbonization, impregnation, and reconstitution limits the moisture required for fungal growth, hindering the invasion of wood-decaying fungi into the bamboo scrimber. Additionally, phenolic resins exhibit some antibacterial properties, making bamboo scrimber a durable material with high decay resistance.

参考文献/References:

[1] 李霞镇,徐 明,徐金梅,等.毛竹材室内耐腐性能研究[J].木材加工机械,2018,29(1):5-9.
LI Xiazhen,XU Ming,XU Jinmei,et al.Research on the natural durability properties of bamboo in laboratory[J].Wood Processing Machinery,2018,29(1):5-9.
[2]陈利芳,苏海涛,刘 磊,等.11种竹材的防腐可处理性能和天然耐腐性能试验[J].广东林业科技,2007,23(1):34-36,46.
CHEN Lifang,SU Haitao,LIU Lei,et al.Preservative treatment performance and natural antidecay studies of 11 bamboo species[J].Guangdong Forestry Science and Technology,2007,23(1):34-36,46.
[3]SUPRAPTI S.Decay resistance of five Indonesian bamboo species against fungi[J].Journal of Tropical Forest Science,2010,22:287-294.
[4]LIESE W,KUMAR S,RATTAN N.Bamboo preservation compendium[M].New Delhi:Centre for Indian Bamboo Resource and Technology,2003.
[5]LIESE W,TANG T K H.Preservation and drying of bamboo[M]//LIESE W,KOHL M.Bamboo.Berlin:Springer,2015:257-297.
[6]肖纲要,李霞镇,钟 永.结构用重组竹抗弯力学性能[J].安徽农业大学学报,2017,44(1):60-64.
XIAO Gangyao,LI Xiazhen,ZHONG Yong.Bending properties of the structural recombinant bamboo[J].Journal of Anhui Agricultural University,2017,44(1):60-64.
[7]秦 莉.热处理对重组竹材物理力学及耐久性能影响的研究[D].北京:中国林业科学研究院,2010.
QIN Li.Effect of thermo-treatment on physical,mechanical properties and durability of reconstituted bamboo lumber[D].Beijing:Chinese Academy of Forestry,2010.
[8]KUMAR A,VLACH T,LAIBLOVA L,et al.Engineered bamboo scrimber:influence of density on the mechanical and water absorption properties[J].Construction and Building Materials,2016,127:815-827.
[9]魏万姝.慈竹重组材防霉技术初步研究[D].北京:中国林业科学研究院,2011.
WEI Wanshu.A fundamental research on enhancing the mold resistance of bamboo scrimber[D].Beijing:Chinese Academy of Forestry,2011.
[10]岑晓倩,张亚庆,陈林碧,等.毛竹和重组竹腐朽前后的表面颜色及耐腐性能[J].森林与环境学报,2021,41(3):331-336.
CEN Xiaoqian,ZHANG Yaqing,CHEN Linbi,et al.Assessment of the surface color properties and decay resistance performance of moso bamboo and bamboo scrimber before and after fungal decay[J].Journal of Forest and Environment,2021,41(3):331-336.
[11]木材耐久性能 第1部分:天然耐腐性实验室试验方法:GB/T 13942.1—2009[S].北京:中国标准出版社,2009.
Durability of wood — part 1:method for laboratory test of natural decay resistance:GB/T 13942.1—2009[S].Beijing:Standards Press of China,2009.
[12]古建筑木构件的非破坏性检测方法及腐朽分级:LY/T 2146—2013[S].北京:中国标准出版社,2013.
Method for non-destructive testing and decay classification of wood element of ancient architecture:LY/T 2146—2013[S].Beijing:Standards Press of China,2013.
[13]Standard test method of accelerated laboratory test of natural decay resistance of woods:ASTM D2017-05[S].West Conshohocken,PA:ASTM,2005.
[14]木材抗弯强度试验方法:GB/T 1936.1—2009[S].北京:中国标准出版社,2009.
Method of testing in bending strength of wood:GB/T 1936.1—2009[S].Beijing:Standards Press of China,2009.
[15]木材抗弯弹性模量测定方法:GB/T 1936.2—2009[S].北京:中国标准出版社,2009.
Method for determination of the modulus of elasticity in static bending of wood:GB/T 1936.2—2009[S].Beijing:Standards Press of China,2009.
[16]木材顺纹抗压强度试验方法:GB/T 1935—2009[S].北京:中国标准出版社,2009.
Method of testing in compressive strength parallel to grain of wood:GB/T 1935—2009[S].Beijing:Standards Press of China,2009.
[17]GUSSE A C,MILLER P D,VOLK T J.White-rot fungi demonstrate first biodegradation of phenolic resin[J].Environmental Science & Technology,2006,40(13):4196-4199.
[18]LEVI M.Decay of chemically treated wood[C]//LIESE,W.Biological Transformation of Wood by Microorganisms.Berlin:Springer,1975:118-128
[19]王伟宏,MORRELL J J.真菌腐朽及潮湿环境对定向刨花板力学性能的影响[J].东北林业大学学报,2005,33(1):28-29,34.
WANG Weihong,MORRELL J J.Effects of rot decay and moist condition on the mechanical properties of OSB[J].Journal of Northeast Forestry University,2005,33(1):28-29,34.
[20]WANG W H,KENT S,FREITAG C,et al.Effect of moisture and fungal exposure on the mechanical properties of hem-fir plywood[J].Journal of Forestry Research,2005,16(4):299-300,348.
[21]葛晓雯,王立海,侯捷建,等.褐腐杨木微观结构、力学性能与化学成分的关系研究[J].北京林业大学学报,2016,38(10):112-122.
GE Xiaowen,WANG Lihai,HOU Jiejian,et al.Relationship among microstructure,mechanical properties and chemical compositions in populus cathayana sapwood during brown-rot decay[J].Journal of Beijing Forestry University,2016,38(10):112-122.
[22]王雪亮,张 帆,李瑞政,等.加速腐朽环境下木构件的强度退化时变模型[J].武汉理工大学学报,2015,37(6):76-80.
WANG Xueliang,ZHANG Fan,LI Ruizheng,et al.Strength degradation model of wood components under accelerated decay environment[J].Journal of Wuhan University of Technology,2015,37(6):76-80.
[23]余旺旺,李彩虹,薛 东,等.木塑复合材料抗菌性能研究[J].材料导报,2013,27(增1):224-226,235.
YU Wangwang,LI Caihong,XUE Dong,et al.Study of antibacterial properties of wood-plastic composite[J].Materials Review,2013,27(S1):224-226,235.
[24]WILCOX W W.Anatomical changes in wood cell walls attacked by fungi and bacteria[J].The Botanical Review,1970,36(1):1-28.
[25]周 明,腰希申.应用扫描电子显微镜对杨木及其塑合材抗腐性的研究[J].中国林业科学,1978,14(3):47-51.
ZHOU Ming,YAO Xi-shen.The study of decay resistance of poplar and laminated material with scanning electron microscope[J].Scientia Silvae Sinicae,1978,14(3):47-51.
[26]徐 明.毛竹腐朽过程显微构造及化学特性变化研究[D].北京:中国林业科学研究院,2008.
XU Ming.Study on the changes of microstructure and chemical characteristics of phyllostachys pubescens during decay[D].Beijing:Chinese Academy of Forestry,2008.
[27]李贤军,刘 元,苏洪泽,等.高温炭化处理对木材平衡含水率的影响规律[J].林业实用技术,2008(10):50-51.
LI Xianjun,LIU Yuan,SU Hongze,et al.The influence of high temperature carbonization treatment on the equilibrium moisture content of wood.[J].Practical Forestry Technology,2008(10):50-51.
[28]吴秉岭,余养伦,齐锦秋,等.竹束精细疏解与炭化处理对重组竹性能的影响[J].南京林业大学学报(自然科学版),2014,38(6):115-120.
WU Bingling,YU Yanglun,QI Jinqiu,et al.Effects of bamboo bundles treated with fine fluffing and carbonized treatment on the properties of bamboo scrimber[J].Journal of Nanjing Forestry University(Natural Sciences Edition),2014,38(6):115-120.
[29]岳 孔,夏 炎,张 伟,等.酚醛树脂改性速生杨木耐腐性能研究[J].福建林学院学报,2008,28(2):164-168.
YUE Kong,XIA Yan,ZHANG Wei,et al.Study on anti-decay ability of modified fast-grown poplar with phenol-formaldehyde resin[J].Journal of Fujian College of Forestry,2008,28(2):164-168.

相似文献/References:

[1]陈 思,魏 洋,赵鲲鹏,等.重组竹受弯短期蠕变性能试验[J].建筑科学与工程学报,2021,38(05):91.[doi:10.19815/j.jace.2020.10062]
　CHEN Si,WEI Yang,ZHAO Kun-peng,et al.Experiment on Short-term Bending Creep Performance of Bamboo Scrimber[J].Journal of Architecture and Civil Engineering,2021,38(03):91.[doi:10.19815/j.jace.2020.10062]

备注/Memo

备注/Memo:

收稿日期:2021-10-25
基金项目:国家重点研发计划项目(2017YFC0703503)
作者简介:储 炜(1995-),男,工学硕士,E-mail:chuw0809@163.com。
通信作者:徐 明(1972-),男,工学博士,教授级高工,博士生导师,E-mail:xuming@seu.edu.cn。

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更新日期/Last Update: 2023-05-20