南酸枣木材物理力学性质分析与评价  

Research and Evaluation of Physical and Mechanical Properties of Choerospondias axillaris Wood

作　　者：吴善群 WU Shanqun(Datian County Forestry Bureau of Fujian Province,Datian 366100,Fujian,China)

机构地区：[1]福建省大田县林业局,福建大田366100

出　　处：《福建林业科技》2024年第4期38-42,共5页Journal of Fujian Forestry Science and Technology

基　　金：福建省地方标准《南酸枣用材林栽培技术规程》(DB/T1600-2016);三明市引导性科技项目(2018-N-2)。

摘　　要：为阐明南酸枣木材物理力学性质,对36年生南酸枣木材物理力学性质进行测定、分析和评价,并与常用用材树种木材性能进行对比分析。结果表明,南酸枣木材的气干密度0.536 g·cm^(-3),基本密度0.455 g·cm^(-3),全干密度0.503 g·cm^(-3),密度等级为“中偏轻”;木材体积气干干缩率和全干干缩率分别为5.0%和9.7%,从全干到气干和从全干到饱和的湿胀率分别为5.3%和10.8%,体积干缩系数为0.438%,差异干缩和差异湿胀均大于2。木材端面硬度4130 N,抗弯强度91.3 MPa,顺纹抗压强度44.9 MPa;综合强度136.2 MPa,品质系数299.3 MPa,综合评价认为南酸枣木材属于中等级木材。与其它常用木材树种相比,南酸枣木材力学性能高于马尾松等常用木材树种,可作为中等级家具、木门、木地板等用材。To clarify the physical and mechanical properties of Choerospondias axillaris wood and provide scientific basis for its rational utilization,the physical and mechanical properties of 36-year-old Choerospondias axillaris wood were measured,analyzed,evaluated and compared with the wood properties of commonly used tree species.The results showed that the air dry density of Choerospondias axillaris wood was 0.536 g·cm^(-3),the basic density was 0.455g·cm^(-3),the total dry density was 0.503 g·cm^(-3),and the density grade was"medium to light";the volumetric air drying shrinkage rate and full drying shrinkage rate of wood were 5.0%and 9.7%,respectively.The wet expansion rates from full drying to air drying and from full drying to saturation were 5.3%and 10.8%,respectively.The volume shrinkage coefficient was 0.438%,and both differential shrinkage and differential swelling were greater than 2.The hardness of the wood end face was 4130 N,the bending strength was 91.3 MPa,and the compressive strength along the grain was 44.9 MPa;The comprehensive strength was 136.2 MPa,and the quality coefficient was 299.3 MPa.Based on the comprehensive evaluation,it was considered that the wood of Choerospondias axillaris belonged to medium grade wood.Compared with other commonly used wood species,the mechanical properties of Choerospondias axillaris wood were slightly higher than those of commonly used wood species such as Pinus massoniana,and it can be used as a material for medium grade furniture,wooden doors,wooden floors,etc.

关 键 词：南酸枣 木材物理性质 木材力学性质 综合评价 

分 类 号：S781.3[农业科学—木材科学与技术]