新疆杨密度 干缩性

本数据记录了新疆杨中密度 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 a comprehensive set of parameters for medium-density Populus bolleana wood, including serial numbers, logbook serial numbers, specimen serial numbers, dimensions before kiln-drying in tangential, radial and along-grain directions, dimensions after kiln-drying in the same three directions, tangential shrinkage, tangential shrinkage coefficient, radial shrinkage, radial shrinkage coefficient, moisture content, specimen weight before kiln-drying, pre-kiln-drying volume, post-kiln-drying volume, volumetric shrinkage, volumetric shrinkage coefficient, in-test density, and density at 15% moisture content.

Various physical and mechanical measurement indicators of wood directly reflect the strength and other characteristic properties of this wood species, providing scientific data for wood utilization and the formulation of wood structure standards. This database includes physical and mechanical test data and corresponding test methods (please refer to Annex 1: National Standard of the People's Republic of China GB 1927–1943-91 *Test Methods for Physical and Mechanical Properties of Wood*, and Annex 2: Definitions of individual items of wood physical and mechanical properties).