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LY/T 2720-2016 English PDF

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LY/T 2720-2016: Test method for wood failure percentage in adhesive bonded joints
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Basic data

Standard ID LY/T 2720-2016 (LY/T2720-2016)
Description (Translated English) Test method for wood failure percentage in adhesive bonded joints
Sector / Industry Forestry Industry Standard (Recommended)
Classification of Chinese Standard B70
Classification of International Standard 79.060
Word Count Estimation 6,623
Date of Issue 2016-07-27
Date of Implementation 2016-12-01
Regulation (derived from) State Forestry Administration Announcement No.17 of 2016; Industry Standard Announcement No.16 of 2016 (No.204)
Issuing agency(ies) State Forestry Administration

LY/T 2720-2016: Test method for wood failure percentage in adhesive bonded joints

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(Method for determination of breaking rate of glued wood) ICS 79.060 B70 People's Republic of China Forestry Industry Standard Method for determining the breaking rate of glued wood Released on.2016-07-27 Implementation of.2016-12-01 State Forestry Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. Publication of this document The organization is not responsible for identifying these patents. This standard is proposed and managed by the National Timber Standardization Technical Committee Structural Subcommittee on Wood (SAC/TC41/SC4). This standard was drafted. Beijing Forestry University, Zhejiang Province Wood Products Quality Testing Center Nanxun Testing Institute, Suzhou Kunlun Green Building Wood Structure Technology Co., Ltd., Beixin Group Building Materials Co., Ltd., Zhejiang Chengzhu New Material Technology Co., Ltd., Manzhouli Lianzhong Wood Industry Co., Ltd. Limited liability company, Harbin Chengfeng Adhesive Co., Ltd. The main drafters of this standard. Zhang Shuangbao, Xu Zhengdong, Li Ning, Song Wei, Shen Zaihua, Yang Xu, Ni Wei, Shen Binhua, Wang Yongbing, Yu Xuefei, Wang Cuicui, Wang Dandan, Yu Zhengzheng, Hou Guojun, Liu Xiang, Zhao Fang, Zhang Yazhuo, Zhao Ruilong, Feng Mingzhi, Zhao Heng, Li Wenyan, Li Xuefei, Wang Xiuquan, Wang Wenchao. Method for determining the breaking rate of glued wood

1 Scope

This standard specifies the terms and definitions of the determination of the wood surface breaking rate of the glued surface, the test instrument, the preparation of the test piece, the test method, the calculation and test of the result. report. This standard is applicable to the determination of the rate of wood damage in the plane.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 18259 wood-based panel and its surface decoration terminology

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Deep wood destruction deepwoodfailure Destruction of three or more layers of wood cells outside the rubber layer. 3.2 Shallow wood damage shalowwoodfailure Destruction of the first layer and the second layer of wood cells outside the rubber layer. 3.3 Wood breaking rate woodfailurepercentage When testing the bonding strength, it is estimated by visual inspection that the wood fiber is glued or torn apart on the shear failure surface of the test piece. The percentage of the sheared area of the specimen. [GB/T 18259-2009, 2.2.1.120]

4 test equipment

4.1 Light source Illumination should be 800lx~1000lx, or with the same level of natural light source, and the tester can have normal vision or correction Normal vision is achieved so that the area of wood damage on the surface of the specimen is viewed from any angle. 4.2 Wood breaking rate measuring ruler The wooden breaking rate measuring ruler is shown in Figure 1. It should be a transparent plexiglass plate with a maximum measuring range of 60mm × 100mm. The degree is 2mm, each cell area is 4mm2, and for the dimension line marked with numbers, the color should be different from other dimension lines.

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