GB/T 12957-2026Test method for the activity of industrial waste slag used as a cement addition (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. This document replaces GB/T 12957-2005.Compared with the GB/T 12957-2005 standard, apart from structural adjustments and editorial changes, the main... The technological changes are as follows:

a) A method summary has been added (see Chapter 4);

b) The fineness requirements for industrial waste residue have been revised (see 5.1,.2005 edition 3.1);

c) The technical requirements for natural gypsum have been revised (see 5.2,.2005 edition 3.2);

d) The technical requirements for silicate cement have been revised (see 5.3,.2005 edition 3.3);

e) The requirements for test water have been changed (see 5.4,.2005 edition 3.4);

f) Increased requirements for curing chamber and laboratory conditions (see

6.1.3.2 and 6.1.4);

g) The sample requirements and result interpretation for the potential water hardness test have been changed (see

6.1.2 and 6.1.6,

5.1.5 in the.2005 edition);

h) A water hardness test has been added (see 6.2);

i) An activity assessment has been added (see Chapter 7). 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 Cement Standardization Technical Committee (SAC/TC184). This document was drafted by: China Building Materials Academy Co., Ltd., and the Second Engineering Co., Ltd. of China Railway 25th Bureau Group. Jiangxi Provincial Institute of Quality and Standardization, Changda Municipal Engineering (Guangdong) Co., Ltd., Guangdong Shengrui Technology Co., Ltd., Yunnan Provincial Construction Materials Product Quality Inspection and Research Institute, Henan Jiaotong University Engineering Technology Group Co., Ltd., Shenzhen University, Chengdu University of Technology, Zhejiang Huiheyuan Environment Technology Co., Ltd., Northeastern University, Sichuan Road & Bridge Engineering Co., Ltd., Beijing University of Technology, Qingdao University of Technology, Three Gorges University, Ninghua County Construction Engineering Quality and Safety Service Center, Ningxia Transportation Science Research Institute Co., Ltd., Mengzi Yingzhou Cement Co., Ltd., Sichuan Chuanqiao Engineering Testing and Inspection Co., Ltd., Hubei Provincial Waterway Engineering Co., Ltd., Northeast Electric Power University, Shandong Shunxing Cement Co., Ltd. Company, Wuhan University of Technology, Guangxi University, Sichuan Highway and Bridge Construction Group Co., Ltd., Beijing Building Materials Science Research Institute Co., Ltd. China Railway Engineering Design & Consulting Group Co., Ltd., Guizhou Construction Vocational and Technical College, Huzhou Xinkaiyuan Crushed Stone Co., Ltd., and China Communications Construction First Highway Engineering Bureau Civil Engineering Engineering and Construction Research Institute Co., Ltd., China Railway 18th Bureau Group Construction and Installation Engineering Co., Ltd., Fujian Longyan Fangyuan Cement Products Co., Ltd. China Coal Technology & Engineering Mining Research Institute Co., Ltd., Feiyi Co., Ltd., Shanxi Shunwang Construction Engineering Co., Ltd., Ningxia Jiaojian Transportation Technology Research Institute Research Institute Co., Ltd., Jiangxi Jiuling Lithium Industry Co., Ltd., China Railway Seventh Group Xi'an Railway Engineering Co., Ltd., Ansteel Green Resources Technology Limited Liability Company, Guangdong Tapai Group Co., Ltd., Jingye Steel Co., Ltd., Beijing Zhongtian Standard Technology Research Institute Group Co., Ltd. company. The main drafters of this document are. Wang Xin, Qiu Jiayang, Guan Haijun, Qin Zhijun, Zhang Jinshan, Shao Jinggan, Liu Hewen, Zheng Mingming, Lei Ningning, and Cheng Hao. Du Yong, Liu Chen, Zheng Xu, Gu Xiaowei, Yan Feng, Tang Xiaoping, Zhang Jie, Tan Yunzhi, Deng Huafeng, Li Haibing, Cui Suping, Li Bangwei, Wu Feng, Fang Guohao, Bao Jiuwen, Yu Chenyun, Dong Yong, Fang Jian, Tian Zhijin, Geng Hairong, Qian Weimin, Wang Dehong, Guo Lei, Qi Lianyong, Shen Yonglin, Ding Sheng, Zhang Zhijuan, Jiang Shuangquan Zhou Mingkai, Sang Hongshan, Li Zhengji, Xiao Jinjun, Li Shisong, Ju Xiaoxia, Zhang Xiao, Bao Shenxu, Zhan Wenbing, Pan Meichen, Zeng Zheng, Wang Xiulan, Guo Pengfei Yao Bingqian, Yang Lüfeng, Yang Jun, Chen Xiaowei, Bater, Yue Yunye, Yin Xiwen, Cui Yong, Bin Feng, Xiao Chongchun, Kong Qingliang, Chi Qigui, Zhang Zhibiao Zhong Huasheng, Hui Yingxin, Dong Tingliang, Wang Qingling, Xu Yaxing, Pang Na. The release history of this document and the document it replaces is as follows:

5 Experimental Materials

5.1 Industrial waste residue Take 5 kg of representative industrial waste residue, dry it at (100±5)°C until the moisture content is less than 1%, and then grind it finely using a laboratory small mill. The residue on a 45µm square-hole sieve is within the range of (10±5)%. Grinding aids conforming to GB/T 26748 can be added during the sample grinding process, and their... The dosage should be less than 0.5%.

5.2 Natural Gypsum Gypsum conforming to Class G or Class M mixed gypsum as specified in GB/T 5483, ground to a fineness such that the residue on a 45µm square-hole sieve is no more than 30%.

5.3 Silicate Cement Portland cement meeting GB 175 requirements, with a 28-day compressive strength of (55.0±5) MPa and a specific surface area of (350±10) m^2/kg. The sulfate sulfur trioxide content (mass fraction) is (2.5±0.5)%, and the alkali content (mass fraction) is in the range of 0.5%~0.9%.

5.4 Test water Water should meet the requirements of Grade III or above as specified in GB/T 6682.