鸡毛松密度 干缩性

本数据记录了鸡毛松中密度 干缩性的序号、记录本序号、试样序号、弦向炉干前尺寸、径向炉干前尺寸、顺纹方向炉干前尺寸、弦向炉干后尺寸、径向炉干后尺寸、顺纹方向炉干后尺寸、弦向干缩性、弦向干缩系数、径向干缩性、径向干缩系数、含水率、炉干前试样重、炉干前体积、炉干后体积、体积干缩性、体积干缩系数、试验时密度、含水率15%时密度等记录。木材物理力学的各项测定指标，直接反映此种木材的强度等特性，为木材利用和木结构的规范等提供科学数据。本数据库包括物理力学数据和其试验方法（请参看附件1中华人民共和国国家标准GB1927～1943-91《木材物理力学性质试验方法》，附件2木材物理力学各个项目的定义）。

This dataset records the serial numbers of medium-density shrinkage properties of Podocarpus imbricatus, logbook serial numbers, specimen serial numbers, dimensions before oven-drying in the tangential direction, dimensions before oven-drying in the radial direction, dimensions before oven-drying along the grain, dimensions after oven-drying in the tangential direction, dimensions after oven-drying in the radial direction, dimensions after oven-drying along the grain, tangential shrinkage, tangential shrinkage coefficient, radial shrinkage, radial shrinkage coefficient, moisture content, specimen weight before oven-drying, volume before oven-drying, volume after oven-drying, volumetric shrinkage, volumetric shrinkage coefficient, density during testing, and density at 15% moisture content, among other records. All measured physical and mechanical properties of wood directly reflect the strength and other characteristics of this wood species, providing scientific data for wood utilization and the formulation of structural wood codes. This database includes physical and mechanical test data and their corresponding test methods (please refer to Annex 1: Chinese National Standard GB1927–1943-91 *Test Methods for Physical and Mechanical Properties of Wood*, and Annex 2: Definitions of each item of wood physical and mechanical properties).