重组竹高温处理后物理力学性能研究  

Physical and Mechanical Properties of Bamboo Scrimber After High Temperature Treatment

作　　者：俞君宝[1,2] 杨鼎宜[1] 杜保聪 蔡元成 YU Jun-bao;YANG Ding-yi;DU Bao-cong;CAI Yuan-cheng(College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,Jiangsu,China;Yangzhou Polytechnic Institute,Yangzhou 225100,Jiangsu,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]扬州工业职业技术学院,江苏扬州225100

出　　处：《西北林学院学报》2022年第4期243-247,265,共6页Journal of Northwest Forestry University

基　　金：国家重点研发计划(2018YFD1101002);江苏省高等学校自然科学研究面上项目(20KJB560010);江苏省住房和城乡建设厅科技项目(2020ZD40)。

摘　　要：为探索高温处理对重组竹物理力学性能的影响,研究不同温度(110、170、230℃)和不同处理时间(1、2、3、4 h)对重组竹抗压强度、抗剪强度、抗弯强度、抗拉强度和质量损失的影响。结果表明,重组竹的力学性能随着处理温度和时间的增加而逐渐降低。230℃高温下重组竹的物理力学性能降低较显著,恒温4 h后抗压强度、抗剪强度、抗弯强度、抗拉强度及质量的残留率分别35%、20%、25%、10%、70%。高温后重组竹在自然冷却条件下的残余强度大于浸水冷却条件下的残余强度。In order to explore the effects of high temperature treatment on the physical and mechanical properties of the bamboo scrimber(BS),the effects of different temperatures(110,170,and 230℃)and different treatment time durations(1 h,2 h,3 h,and 4 h)on the compressive strength,shear strength,flexural strength,tensile strength and mass loss of the BS were studied.The results showed that the mechanical properties of the BS decreased with the increase of treatment temperature and time.The physical and mechanical properties of the BS decreased significantly at 230℃,and the residual rates of compressive strength,shear strength,flexural strength,tensile strength and mass loss were 35%,20%,25%,10%and 70%,respectively,after 4 h thermostatic treatment.After treated with high temperature,the residual strength of the BS under natural cooling conditions was greater than that under water cooling conditions.

关 键 词：重组竹 高温处理 力学性能 物理性能 

分 类 号：S781.9[农业科学—木材科学与技术]