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GB/T 20973-2020: Bentonite
Status: Valid GB/T 20973: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20973-2020 | English | 339 |
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4 days [Need to translate]
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Bentonite
| Valid |
GB/T 20973-2020
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| GB/T 20973-2007 | English | 639 |
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3 days [Need to translate]
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Bentonite
| Obsolete |
GB/T 20973-2007
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PDF similar to GB/T 20973-2020
Basic data | Standard ID | GB/T 20973-2020 (GB/T20973-2020) | | Description (Translated English) | Bentonite | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q69 | | Classification of International Standard | 73.080 | | Word Count Estimation | 18,140 | | Date of Issue | 2020-06-02 | | Date of Implementation | 2021-04-01 | | Older Standard (superseded by this standard) | GB/T 20973-2007 | | Quoted Standard | GB/T 601; GB/T 1966; GB/T 1967; GB/T 2684; GB/T 5005; GB/T 6003.1; GB/T 6682; GB/T 8170; GB/T 25138; DZ/T 0118 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the terms and definitions, classification, marking, requirements, test methods, inspection rules and marking, packaging, transportation and storage of bentonite. This standard applies to foundry, metallurgical pellets, drilling mud and bentonite for civil engineering. This standard does not apply to processed products whose structure of bentonite has been changed by treatment with inorganic acid or organic matter. | GB/T 20973-2020: Bentonite---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.
Bentonite
ICS 73.080
Q69
National Standards of People's Republic of China
Replace GB/T 20973-2007
Bentonite
2020-06-02 release
2021-04-01 Implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 20973-2007 "Bentonite". Compared with GB/T 20973-2007, except for editorial modifications, the main technologies
The changes are as follows.
--- Modified the normative reference document, replacing the standard in the normative reference document with the current effective standard (see Chapter 2,.2007
Chapter 2 of the edition);
--- Deleted the description of the classification of bentonite for foundry and bentonite for metallurgical pellets (see.2007 version 4.3);
--- Added product specifications, product marks, quality index requirements and factory inspection items for bentonite for civil engineering (see 4.1.3,
4.2.3, Table 4, 7.1.1.4);
--- Deleted the expression of product specification level in 4.4.1 (see 4.4.1 of.2007 edition);
--- Deleted the description of the product grade in Table 1 (see Table 1 of the.2007 edition);
--- Deleted the expression of product grade in Table 2 (see Table 2 of.2007 edition);
---Increase the quality index requirements and measurement of expansion capacity (see Table 2 and 6.7);
--- Removed the index requirements and detection methods of the expansion index (see Table 2 and 6.7 of the.2007 edition);
--- Removed the yield value/plastic viscosity index requirements and corresponding detection methods (see Table 3 and 6.9 of the.2007 edition);
--- Increased the quality index requirements and determination of dynamic plastic ratio (see Table 3 and 6.9);
--- Added calibration of methylene blue solution (see 6.3.2.10);
--- Increased the requirements of the oscillating machine in the equipment of the screening method (75μm, dry sieve) detection method (see 6.4.1.4);
--- Modified the test procedure of screening rate (75μm, dry sieve) (see 6.4.2, version 6.4.2 of.2007 edition);
--- Deleted the thermometer and requirements in the moisture detection method (see 6.5.1.1 of the.2007 edition);
--- Modified the accuracy of the balance in the instrument and equipment in the moisture detection method (see 6.5.1.1, 6.5.1.2 in the.2007 edition);
--- Detailed test steps in the moisture detection method (see 6.5.2,.2007 version 6.5.2)
--- Deleted the yield value/plastic viscosity item in the drilling mud factory inspection (see.2007 version 7.1.1);
--- Added the dynamic plastic ratio item in the drilling mud factory inspection (see 7.1.1.3);
--- Modified the product packaging (see 8.2,.2007 version 9.1);
--- Detailed transportation and storage (see 8.3,.2007 version 9.2);
--- Modified the accuracy requirements of the balance in the instruments and equipment in Appendix B (see B.2.3, B.2.3 of the.2007 edition);
--- Added the oven and requirements in Appendix B instruments (see B.2.5);
--- Modified Appendix B test procedure (see B.4.2,.2007 version B.4).
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Non-metallic Mineral Products and Products Standardization Technical Committee (SAC/TC406).
This standard was drafted by. Wuhu Feishang Non-metallic Materials Co., Ltd., Zhejiang Fenghong New Materials Co., Ltd., Xianyang Non-metallic Mineral Research Institute
Research Design Institute Co., Ltd., Huaiyin Teachers College, Hangzhou Jiuxu New Material Technology Co., Ltd., Tongling Bofeng Industrial Co., Ltd., National Non-Metallic
Mineral Products Quality Supervision and Inspection Center, Guangxi Longan Ruifeng Industry and Trade Co., Ltd., Leping Clean Bleaching Soil Co., Ltd., Huangshan Baiyue Activity
Baitu Co., Ltd., Beijing Jiuyan New Material Technology Co., Ltd.
The main drafters of this standard. Duan Yaping, Xu Chengyin, Li Jingjing, Li Meisheng, Tong Yun, He Fei, Zhang Zhen, Liang Fujue, Zhou Zichao, Zhang Wei,
Miao Ximing, Dang Bo.
The previous version releases replaced by this standard are.
--- GB/T 20973-2007.
Bentonite
1 Scope
This standard specifies the terms and definitions, classification, marking, requirements, test methods, inspection rules and signs of bentonite, packaging, transportation and
Storage.
This standard applies to foundry, metallurgical pellets, drilling mud and bentonite for civil engineering.
This standard does not apply to processed products that have undergone changes in the structure of bentonite by treatment with inorganic acids or organic substances.
2 Normative references
The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
Preparation of GB/T 601 standard titration solution for chemical reagents
GB/T 1966 Test method for apparent porosity and bulk density of porous ceramics
GB/T 1967 Test method for pore diameter of porous ceramics
GB/T 2684 Test method for foundry sand and mixture
GB/T 5005 Specification for drilling fluid materials
GB/T 6003.1 Technical requirements and inspection of test sieve Part 1.Test sieve of metal wire braided mesh
GB/T 6682 Analysis of laboratory water specifications and test methods
GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values
GB/T 25138 Standard sand for testing foundry binders
DZ/T 0118 Laboratory sieve shaker technical conditions
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Cation exchange capacity
100g Bentonite exchangeable cation millimoles.
3.2
Blue absorption methyleneblueindex
100g bentonite is saturated with water and absorbs grams of anhydrous methylene blue.
3.3
Water absorption
The ability of bentonite to absorb water naturally at 20℃ and 0.1MPa for 2h.
3.4
Swelcapacity
The volume of 1g bentonite swelled in hydrochloric acid solution for 24h.
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