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GB/T 21120-2018: Synthetic fibres for cement concrete and mortar
Status: Valid GB/T 21120: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21120-2018 | English | 599 |
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Synthetic fibres for cement concrete and mortar
| Valid |
GB/T 21120-2018
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| GB/T 21120-2007 | English | 959 |
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Synthetic fibres for cement, cement mortar and concrete
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GB/T 21120-2007
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PDF similar to GB/T 21120-2018
Basic data | Standard ID | GB/T 21120-2018 (GB/T21120-2018) | | Description (Translated English) | Synthetic fibres for cement concrete and mortar | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q14 | | Classification of International Standard | 91.100.30 | | Word Count Estimation | 30,330 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2019-11-01 | | Older Standard (superseded by this standard) | GB/T 21120-2007 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 21120-2018: Synthetic fibres for cement concrete and mortar---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Synthetic fibres for cement cement concrete and mortar
ICS 91.100.30
Q14
National Standards of People's Republic of China
Replace GB/T 21120-2007
Synthetic fiber for cement concrete and mortar
Published on.2018-12-28
2019-11-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 21120-2007 "synthetic fibers for cement concrete and mortar". Compared with GB/T 21120-2007, except
The main technical changes outside the editorial changes are as follows.
---Adjusted the standard fiber range (see Chapter 1, Chapter 1 of the.2007 edition);
--- Adjusted some of the normative references (see Chapter 2, Chapter 2 of the.2007 edition);
--- Terms and definitions increase polyformaldehyde fiber, linear density, etc. (see 3.6 and 3.20);
--- Product classification adds polyoxymethylene fibers (see 4.1);
--- Simplified product marking (see 4.3, 4.3 of the.2007 edition);
--- Increase the specification and measurement method of the moisture content of synthetic fibers (see 5.4 and 6.2);
--- Revised the fiber related parameter indicators of Table 2 (see Table 2, Table 2 of the.2007 edition);
--- Revised the provisions of Table 3 for the bending toughness of coarse fiber concrete (see Table 3, Table 3 of the.2007 edition);
--- Removed the provisions of the concrete penetration height ratio in Table 3 (see Table 3, Table 3 of the.2007 edition);
--- Revised the number of tests required in Table 4 (see Table 4, Table 4 of the.2007 edition);
--- Revised the requirements of standard factory inspection and type inspection (see 7.1 and 7.2,.2007 editions 7.1 and 7.2);
--- Added the main performance parameters of Appendix A synthetic fiber (see Appendix A);
--- Added the method for determining the diameter of the crude fiber in Appendix B (see Appendix B);
--- Increased the test method for the crack reduction coefficient of mortar in Appendix E (see Appendix E);
--- Added Appendix F fiber concrete flexural toughness test method (see Appendix F);
--- Revised the test method for the alkali resistance of synthetic fibers (see Appendix D, Appendix B of the.2007 edition);
--- Revised the impact test height (see Appendix G, Appendix C of the.2007 edition).
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Cement Products Standardization Technical Committee (SAC/TC197).
This standard is drafted by. Suzhou Concrete Cement Products Research Institute Co., Ltd., Yangzhou University, Suzhou Concrete Cement Products Research
Hospital Testing Center Co., Ltd.
Participated in the drafting of this standard. Yuyao Transportation Planning and Design Institute, Shenzhen Weite New Materials Co., Ltd., Nantong University, Ningbo
Shike New Material Technology Co., Ltd., Changzhou Tianyi Engineering Fiber Co., Ltd., Beijing Zhongfang Fiber Construction Technology Co., Ltd., Nantong Xindi Kedan
Silk Technology Co., Ltd., Shaoxing Baqi New Building Materials Co., Ltd., Inner Mongolia Shuangxin Environmental Protection Material Co., Ltd., Jiangsu Subote
New Materials Co., Ltd., Taian Companion Fiber Co., Ltd., Chongqing Yuntianhua Xinen New Material Development Co., Ltd., Jiangsu Haide New Materials
Co., Ltd., Suzhou Dongde New Building Materials Co., Ltd., Beijing University of Technology.
The main drafters of this standard. Tan Yongquan, Yang Dingyi, Cheng Kehu, Xue Wanyin, Yin Shi, Yu Feng, Sun Yuejun, Shu Jianshuang, Yue Qiuhui, Lin Yingnan,
Luo Jingjing, Lu Shixiang, Wu Jianwei, Zhang Wei, Zhang Lizhe, Li Tiejun, Fan Zhiyong, Liu Rui, Xu Yongzhen, Shi Feng, Gong Chunlan, Yang Zhigan, Zhang Shuai,
Deng Zongcai.
The release of previous versions of the standard replaced by this standard is.
---GB/T 21120-2007.
Synthetic fiber for cement concrete and mortar
1 Scope
This standard specifies the terms and definitions, classification, requirements, test methods, inspection rules, signs, and synthetic fibers for cement concrete and mortar.
Factory, packaging, transportation, storage, etc.
This standard applies to synthetic fibers for cement concrete and mortar.
This standard does not apply to polyester fibers.
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 175 universal Portland cement
GB 8076 concrete admixture
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 10685 wool fiber diameter test method projection microscope method
GB/T 14344 Test method for tensile properties of chemical fiber filaments
GB/T 14684 construction sand
GB/T 14685 construction with pebbles and gravel
GB/T 50080 Standard Test Method for Performance of Concrete Mixtures
GB/T 50081 Standard test method for mechanical properties of ordinary concrete
JC/T 474-2008 mortar, concrete waterproofing agent
JGJ55 general concrete mix design procedure
JGJ63 concrete water standard
JGJ70 building mortar basic performance test method standard
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Synthetic fiber syntheticfibre
A chemical fiber made from a synthetic polymer compound.
3.2
Polypropylene fiber polypropylenefibre
A fiber made of a polypropylene resin which is then spun by melt extrusion.
3.3
Polyacrylonitrile fiber
A fiber produced by polymerizing an acrylonitrile monomer or copolymerizing with other monomers and then spinning.
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