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GB/T 46064-2025: Metakaolin powder used for concrete and mortar
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Metakaolin powder used for concrete and mortar
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Standard similar to GB/T 46064-2025 GB/T 14685 | GB/T 41054 | GB/T 31387 | GB/T 47077 | GB/T 31245 | Basic data | Standard ID | GB/T 46064-2025 (GB/T46064-2025) | | Description (Translated English) | Metakaolin powder used for concrete and mortar | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q13 | | Classification of International Standard | 91.100.30 | | Word Count Estimation | 17,198 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB/T 46064-2025: Metakaolin powder used for concrete and mortar---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT46064-2025
ICS 91.100.30
CCSQ13
National Standards of the People's Republic of China
Metakaolin powder for concrete and mortar
Published on 2025-08-29
Implemented on 2026-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Classification and Identification 2
5.Technical Requirements 2
6.Test Methods 3
7 Inspection Rules 6
8.Marking, Packaging, Storage and Transportation 7.
Appendix A (Normative) Rapid Method for Assessing the Activity of Metakaolin Powder. Determination of pH Reduction Rate of Ca(OH)2 Solution 8
Appendix B (Normative) Test Method for Activity Index of Metakaolin Powder 10
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.
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).
This document was drafted by. China Building Block Association, Chengdu Construction Engineering Group Ninth Construction Co., Ltd., and Henan Building Materials Research and Design Institute.
Limited Liability Company, Inner Mongolia Chaopai New Materials Co., Ltd., Yangzhou University, Suzhou Sinoma Nonmetallic Minerals Industry Design and Research Institute Co., Ltd.
Company, Shanxi Jinyu Kelin Technology Co., Ltd., Beijing Jiaotong University, Suzhou Concrete and Cement Products Research Institute Co., Ltd., Inner Mongolia Zhongzhi Powder
Technology Development Co., Ltd., Shenzhen University, Henan Chuangyu Construction Engineering Co., Ltd., Shandong Dongfang Road & Bridge Construction Co., Ltd., Zhejiang Xin
Huajian Construction Group Co., Ltd., Henan Ruichen Engineering Management Co., Ltd., Zhoukou Gongzheng Construction Engineering Testing and Consulting Co., Ltd., Three Gorges University, China
Materials Construction Co., Ltd., China Communications Second Harbor Engineering Bureau Co., Ltd., Tiezheng Testing Technology Co., Ltd., Xuchang University, China Railway 25th Bureau Group
Fourth Engineering Company, China Construction Xinjiang Construction Engineering (Group) Co., Ltd., Guangxi University, Zhejiang Jinzhou Technology Co., Ltd., Shandong Provincial Highway and Bridge Construction Group Co., Ltd.
Construction Group Co., Ltd., China Railway Sixth Group Hohhot Railway Construction Co., Ltd., Yantai Muping District Construction Engineering Affairs Service Center,
China Construction Second Engineering Bureau Third Construction Engineering Co., Ltd., China Communications First Harbor Engineering Bureau Co., Ltd., and China Railway 20th Bureau Group Second Engineering Co., Ltd.
The main drafters of this document are. Yang Dingyi, Du Jiandong, Chen Shengqiang, Lin Lian, Jia Yanfeng, Shao Jianbing, Zhao Yuemei, Qian Feng, Liu Yuanxiang, and Luo Yi.
Zhao Zhicheng, Li Luyang, Gong Yongfan, Zhu Li, Liu Yin, Yang Weigang, Yang Kailu, Cui Xiangkun, Ying Zhixiong, Han Ming, Tian Yan, Sun Xiaohui, Zheng Ke, Tan Yunzhi
Zhang Yujing, Liu Wenjie, Zhang Sicai, Wang Weiguang, Geng Jingwei, Luo Mian, Zhai Zhuhe, Huang Chunshui, Lai Mingrong, Li Lingfeng, Ren Xiaofei, Yang Lüfeng, He Yang
Zhang Tao, Liu Wei, Deng Huafeng, Li Yuanjie, Zhang Yue, Yao Yuanchao, Zhao Yongbo, Cao Zhonglu, Niu Lijian, Guo Jianmei, Zhang Qian, Zhang Yingkang, Huang Gongxu.
introduction
This document was developed under the "National Standardization Management Committee's Carbon Peak and Carbon Neutrality National Standard Plan Project".
Metakaolin powder is a special deep-processed product of kaolin ore. It is formed by crushing, calcining, and grinding the raw mineral, resulting in a product mainly composed of amorphous silicon.
A powdery substance composed of aluminum oxide particles. Years of experimental research and engineering applications both domestically and internationally have shown that metakaolin powder possesses cementing activity in alkaline environments.
This property is often used to improve the performance of freshly mixed cement concrete and mortar and enhance their product characteristics. It is a special, highly active concrete and mortar compound.
Admixtures.
The carbon dioxide emissions from the production process of metakaolin powder are lower than those from silicate cement. Adding metakaolin to concrete and mortar...
Kaolin powder can reduce cement usage, resulting in a significant reduction in carbon dioxide emissions. The calculations of the effects of incorporating metakaolin powder on concrete and mortar...
When assessing carbon emission reduction effects, the design strength values of concrete and mortar can be kept constant. The unit strength of concrete and mortar with and without metakaolin powder should be calculated separately.
Carbon emissions of volumetric concrete and mortar; comparative analysis to obtain the carbon emission reduction value of adding metakaolin powder to concrete and mortar.
By ignoring all influencing factors other than the amount of cement and metakaolin powder, and using only the carbon content of cement and metakaolin powder, we can achieve the desired result.
The emission values are used to calculate the carbon emission reduction value brought to concrete and mortar by adding metakaolin powder.
Metakaolin powder for concrete and mortar
1.Scope
This document specifies the classification and labeling, technical requirements, test methods, inspection rules, marking, and packaging of metakaolin powder for concrete and mortar.
Packaging, storage and transportation.
This document applies to the production and application of metakaolin powder with cementitious activity for use in cement concrete and mortar.
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 175 General Purpose Portland Cement
GB/T 176-2017 Chemical Analysis Methods for Cement
GB/T 1345 Cement Fineness Test Method - Sieve Analysis
GB/T 1346 Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement
GB/T 1914-2017 Chemical Analysis Filter Paper
GB/T 5950 Method for measuring the whiteness of building materials and non-metallic mineral products
GB 6566-2010 Limits of Radionuclides in Building Materials
GB/T 8075 Terminology for Concrete Admixtures
GB 8076 Concrete Admixtures
GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values
GB/T 9774 Cement Packaging Bags
GB/T 14563-2020 Kaolin and its test methods
GB/T 17671 Test method for strength of cement mortar (ISO method)
GB/T 18736-2017 Mineral Admixtures for High-Strength and High-Performance Concrete
GB/T 43309 Determination of Chemical Elements in Glass Fibers and Raw Materials by X-ray Fluorescence Spectrometry
JC/T 313 Test Method for Expansion Rate of Expansive Cement
3.Terms and Definitions
The terms and definitions defined in GB/T 8075 and the following terms and definitions apply to this document.
3.1
Metakaolin powder; CMP
Mineral raw materials containing kaolinite are calcined and ground at temperatures ranging from 600℃ to 900℃ to form a composition mainly of amorphous aluminum silicate particles.
It is a powder containing active alumina and silica, which exhibits cementitious activity in the alkaline environment of concrete and mortar.
Material.
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