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GB/T 8076-2025 English PDF

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GB/T 8076-2025: Concrete admixtures

GB/T 8076: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 8076-2025	English	759	Add to Cart	6 days [Need to translate]	Concrete admixtures		GB/T 8076-2025
GB 8076-2008	English	115	Add to Cart	0--9 seconds. Auto-delivery	Concrete Admixtures	Valid	GB 8076-2008
GB 8076-1997	English	679	Add to Cart	5 days [Need to translate]	Concrete admixtures	Obsolete	GB 8076-1997
GB 8076-1987	English	RFQ	ASK	3 days [Need to translate]	Concrete admixtures	Obsolete	GB 8076-1987

Basic data

Standard ID	GB/T 8076-2025 (GB/T8076-2025)
Description (Translated English)	Concrete admixtures
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Q12
Classification of International Standard	91.100.30
Word Count Estimation	38,390
Date of Issue	2025-10-31
Date of Implementation	2026-08-01
Older Standard (superseded by this standard)	GB 8076-2008
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China

GB/T 8076-2025: Concrete admixtures

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ICS 91.100.30 CCSQ12 National Standards of the People's Republic of China Replaces GB 8076-2008 Concrete admixtures Published on 2025-10-31 Implemented on August 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Classification, Codes, and Markings 3. 4.1 Classification and Codes 3 4.2 Mark 3 5 Technical Requirements 4 5.1 Physical and chemical properties 4 5.2 Performance of the tested concrete 5 6.Test Methods 10 6.1 Test conditions 10 6.2 Test Materials and Samples 11 6.3 Concrete mix proportion 1.1 6.4 Concrete mixing 12 6.5 Concrete specimen preparation, curing, and number of specimens. 12 6.6 Chloride ion content 15 6.7 Ammonia release content 15 6.8 Residual formaldehyde content 15 6.9 Solid content, density, moisture content, fineness, alkali content, sodium sulfate content, pH value 15 6.10 Water reduction rate 15 6.11 Drainage rate ratio 15 6.12 Gas content and change in gas content over 1 hour 16 6.13 Difference in condensation time 16 6.14 Slump and slump change over 1 hour 17 6.15 Compressive strength ratio 18 6.16 Shrinkage rate ratio 18 6.17 Freeze resistance index 18 6.18 Pressure-induced water excretion rate ratio 19 6.19 Stability 19 6.20 Permeability Height Ratio 20 6.21 Water absorption ratio (48h) 20 6.22 Compressive strength at negative temperatures compared to 21 6.23 Shrinkage rate at negative temperatures compared to 21 6.24 Negative Temperature Permeability Ratio 22 6.25 Strength loss rate after 50 freeze-thaw cycles compared to 22 7.Inspection Rule 23 7.1 Batch No. 23 7.2 Sampling 23 7.3 Inspection Classification 23 7.4 Judgment Rule 24 8.Product manual, packaging, manufacturing, transportation and storage 24 8.1 Product Manual 24 8.2 Packaging 25 8.3 Factory 25 8.4 Transportation and Storage 25 Appendix A (Normative) Technical Conditions for Reference Cement Used for Performance Testing of Concrete Admixtures 26 A.1 General Provisions 26 A.2 Quality Indicators 26 A.3 Test Method 26 A.4 Inspection Rule 27 A.5 Packaging and Storage 27 Appendix B (Normative) Technical Conditions for Special Manufactured Sand for Performance Testing of Concrete Admixtures 28 B.1 General Provisions 28 B.2 Quality Indicators 28 B.3 Test Method 28 B.4 Inspection Rule 28 B.5 Packaging and Storage 29 Appendix C (Informative) Information on Concrete Admixtures 30 C.1 Types and characteristics of admixtures 30 C.2 Main functions of admixtures 31 C.3 Main factors affecting the compatibility of cement and admixtures 32 C.4 Admixture dosage 32 C.5 Precautions for the application of admixtures 32

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB 8076-2008 "Concrete Admixtures". Compared with GB 8076-2008, the main differences are structural adjustments and editorial changes. In addition, the main technological changes are as follows. a) The scope of this document has been changed to include waterproofing agents and antifreeze agents (see Chapter 1, Chapter 1 of the.2008 edition); b) Added labeling for admixtures (see 4.2); c) The code for waterproofing agents, technical requirements, sample quantity, and test methods have been added (see 4.1, 5.2.9, 6.5.3, 6.19, 6.20, and 6.21); d) The code for antifreeze, technical requirements, sample quantity, and test methods have been added (see 4.1, 5.2.10, 6.5.3, 6.22, 6.23, 6.24). 6.25); e) The requirements and test methods for chloride ion content have been changed (see 5.1.1, 6.6, and 5.2 and 6.7.1 in the.2008 edition); f) Requirements and test methods for ammonia release content and residual formaldehyde content have been added (see 5.1.2, 5.1.3, 6.7, and 6.8); g) The requirements for the difference between air content and condensation time for high-performance water-reducing agents have been changed (see 5.2.1, 5.1 in the.2008 version); h) The requirement for the bleeding rate ratio of high-efficiency water-reducing agents has been removed (see 5.1 in the.2008 edition); i) The air content requirement for the air-entraining water-reducing agent has been changed, and the "relative durability (200 cycles)" has been changed to the "freezing resistance index" (see 5.2.4,.2008). (5.1 of the.2018 edition) j) The slump change requirement for pumping agents over 1 hour has been modified (see 5.2.5, 5.1 in the.2008 version), and the pressure bleeding rate ratio has been increased. Requirements, sample quantity, and test methods (see 5.2.5, 6.5.3, 6.18); k) The requirement for the difference in setting time of the accelerator has been changed (see 5.2.6, 5.1 in the.2008 version), and the requirement for the water bleeding ratio has been deleted (see.2008). The.2018 version (5.1) added requirements for water reduction rate and sample quantity (see 5.2.6, 6.5.3); l) The requirement for the bleeding rate ratio of retarders has been removed (see 5.1 in the.2008 edition), while requirements for water reduction rate and sample quantity have been added (see 5.2.7). 6.5.3); m) The air content requirement for the air-entraining agent has been changed (see 5.2.8, 5.1 in the.2008 version), and the water exudation ratio requirement has been deleted (see the.2008 version). 5.1), change "relative durability (200 cycles)" to "freezing resistance index" (see 5.2.8, 5.1 in the.2008 version); n) The test materials include lake sand and manufactured sand (see 6.2.2.2), and the technical requirements for manufactured sand specifically for testing the performance of concrete admixtures have been added. (See Appendix B); o) The sample quantity and mixing method for determining the air content of the tested concrete after 1 hour have been changed (see 6.4, 6.12.2,.2008 edition). 6.5.4.2); p) The sample quantity and mixing method for determining the slump of the tested concrete after 1 hour have been changed (see 6.4, 6.14.2, and 6.5.1.2 in the.2008 edition); q) Added vibration requirements during specimen preparation and bleeding rate determination (see 6.5.1, 6.11.1), and modified the vibration requirements during air content determination. Requirements (see 6.12.1, 6.5.4.1 of the.2008 edition); r) The required number of samples for measuring the slump change over 1 hour, air content, air content change over 1 hour, and frost resistance index has been changed. (See 6.5.3, 6.4.2 in the.2008 edition); s) Added a provision for determining the setting time using linear regression (see 6.13.1); t) A data processing method for the three batches of test results in the shrinkage ratio determination has been added (see 6.16); u) The requirements for batch number, sampling, sample taking, and sample retention have been changed (see 7.1, 7.2, and 7.1 and 7.2 in the.2008 version), and the requirement for retesting has been removed. (See 7.5 in the.2008 edition); v) The factory inspection items have been changed (see 7.3.1, 7.3.1 in the.2008 version); w) The type testing items and judgment rules have been changed (see 7.3.2, 7.4.2, and 7.3.2 and 7.4.2 in the.2008 version); x) The calculation formulas for the tricalcium silicate and tricalcium aluminate content in cement clinker have been modified (see Appendix A, Appendix A of the.2008 edition), adding... The formula for calculating the alkali content in cement is provided in Appendix A. y) The method for determining the chloride ion content in concrete admixtures has been removed (see Appendix B of the.2008 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Cement Products (SAC/TC197). Company, Sichuan Tieke New Building Materials Co., Ltd., Hefei University of Technology Engineering Testing and Inspection Co., Ltd., Jiangxi Pingxiang Lianyou Building Materials Co., Ltd. Company, China Railway Fourth Bureau Group Co., Ltd., Anhui China Railway Engineering Materials Technology Co., Ltd., Shanxi Jack Technology Co., Ltd., Jiashan Huarui Building Materials Co., Ltd. Limited Company, Jiashan Huahao Building Materials Co., Ltd., Beijing Institute of Architectural Engineering Co., Ltd., Guangdong Jiansheng High-Tech Materials Co., Ltd., South Jingfusheng New Materials Co., Ltd., China Railway No. 9 Engineering Testing and Inspection Co., Ltd., Zhejiang Jiaogong Jinzhu Transportation Construction Co., Ltd., Shanxi Hubang New Building Materials Co., Ltd., Guangzhou Krest Building Materials Technology Co., Ltd., and China Water Resources and Hydropower Eleventh Engineering Bureau Co., Ltd. The main drafters of this document are. Wang Ling, Wang Zhendi, Zhang Ping, Zhao Xia, Zhu Weizhong, Li Bin, Wang Yang1), Shen Pingbang, Han Hongliang, and Ding Jiying. Wang Junwei, Li Hao, Jiang Shouheng, Wang Liwei, Guo Zhongyi, Li Wei, Zhu Yeran, Bai Jie, Cai Guisheng, Chen Feng, Chen Jie, Ma Qiang, Han Gang, Fang Yunhui Lin Zejian, Zhang Hui, Li Shugang, Yang Yong, Sun Chaoyuan, Zhang Xiaowei, Jin Lixue, Liu Yuan, Zhou Wu, Guo Wenbin, Jin Jie, Li Dongfeng, Zhong Kaihong, Chang Yuan Lü Jungang, Li Yanhua, Zhong Yilin, Chen Kai, Yan Xiaowei, Liu Xiao, Zhong Jiaqiang, Wu Xiao, Wang Yongzhou, Liu Hao, Zhou Fen, Zhao Lihua, Jia Lei, Sun Zhenping, Tian Bo, Li Lihui, Huang Jing, Li Haibao, Qiao Lifeng, Fu Caohui, Zheng Qiangfeng, Wang Qin, Wang Yingwei, Niu Yinsheng, Ma Wenbo, Ma Xingsheng, Wang Yang 2) Yang Zhifei, Guo Zhenghui, Xue Chao, Wang Aijun, Chai Jianhua, Yang Lei, Hao Pengfei, Long Junyu, Jia Dong, Gao Zhenhui, Chen Jing, Li Moran, Li Lijun, Meng Jiao Xiao Yanfei, Zhu Li, Fan Dongdong, Wang Qi, Jin Zhen, Wang Maolin, Wang Jing, Lu Weixiong, Yan Weimin, Zhang Lei, Zhang Huaxian, Zhang Dianhu, Lei Bin, Luo Wei. This document was first published in 1987, revised for the first time in.1997, revised for the second time in.2008, and this is the third revision. 1) China National Testing & Inspection Group Co., Ltd. 2) Changsha Qianxun New Materials Technology Co., Ltd. Concrete admixtures

1 Scope

This document specifies the classification, designation, marking, technical requirements, test methods, and inspection specifications for concrete admixtures (hereinafter referred to as "admixtures"). The product specifications, packaging, manufacturing, transportation and storage. This document applies to high-performance water-reducing agents, high-efficiency water-reducing agents, ordinary water-reducing agents, air-entraining water-reducing agents, pumping agents, and early-strength agents for cement concrete. The production and... test.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 176 Chemical Analysis Methods for Cement GB/T 750 Test Method for Autoclaved Soundness of Cement GB/T 1346 Cement Standard Consistency Water Requirement, Setting Time and Soundness Test Method GB/T 6679 General Rules for Sampling of Solid Chemical Products GB/T 6680 General Rules for Sampling of Liquid Chemical Products GB/T 8074 Method for Determination of Specific Surface Area of Cement - Blaine Method GB/T 8075 Terminology for Concrete Admixtures GB/T 8077 Test Method for Homogeneity of Concrete Admixtures GB/T 14684 Construction Sand GB/T 14685 Construction pebbles and crushed stone GB/T 18588 Test method for ammonia release from concrete admixtures GB/T 31040 Test method for residual formaldehyde in concrete admixtures GB/T 50080 Standard for Test Methods of Performance of Ordinary Concrete Mixtures GB/T 50081 Standard for Test Methods of Physical and Mechanical Properties of Concrete GB/T 50082 Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete JC/T 729 Cement Paste Mixer JG/T 244 Concrete test mixer JGJ55 Specification for Mix Proportioning Design of Ordinary Concrete JGJ63 Standard for Water Used in Concrete

3 Terms and Definitions

The terms and definitions defined in GB/T 8075 and the following terms and definitions apply to this document.

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