GB/T 46064-2025Metakaolin powder used for concrete and mortar (English PDF)

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

GB 175

GB/T 176-2017

GB/T 1345

GB/T 1346

GB/T 1914-2017

GB/T 5950

GB 6566-2010

GB/T 8075

GB 8076

GB/T 8170

GB/T 9774

GB/T 14563-2020

GB/T 17671

GB/T 18736-2017

GB/T 43309

3 Terms and Definitions

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