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GB/T 176-2025 English PDF

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GB/T 176-2025: Methods for chemical analysis of cement

GB/T 176: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 176-2025	English	2039	Add to Cart	11 days [Need to translate]	Methods for chemical analysis of cement		GB/T 176-2025
GB/T 176-2017	English	625	Add to Cart	0--9 seconds. Auto-delivery	Methods for chemical analysis of cement	Valid	GB/T 176-2017
GB/T 176-2008	English	RFQ	ASK	7 days [Need to translate]	Methods for chemical analysis of cement	Obsolete	GB/T 176-2008
GB/T 176-1996	English	RFQ	ASK	9 days [Need to translate]	Method for chemical analysis of cement	Obsolete	GB/T 176-1996
GB 176-1987	English	959	Add to Cart	6 days [Need to translate]	Method for chemical analysis of cement	Obsolete	GB 176-1987

Basic data

Standard ID	GB/T 176-2025 (GB/T176-2025)
Description (Translated English)	Methods for chemical analysis of cement
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Q11
Classification of International Standard	91.100.10
Word Count Estimation	102,120
Date of Issue	2025-10-31
Date of Implementation	2026-05-01
Older Standard (superseded by this standard)	GB/T 176-2017
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China

GB/T 176-2025: Methods for chemical analysis of cement

---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.
ICS 91.100.10 CCSQ11 National Standards of the People's Republic of China Replaces GB/T 176-2017 Cement chemical analysis methods Published on 2025-10-31 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Preface V 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Basic requirements for the experiment 2 4.1 Number of Tests and Requirements 2 4.2 Expression of mass, volume, titer, and results 2 4.3 Permissible difference 2 4.4 Blank Test 2 4.5 Burning 2 4.6 Constant 2 4.7 Check for the presence of chloride ions (silver nitrate test) 3 4.8 Validation of Test Methods 3 4.9 Reagent 3 5.Sample Preparation 3 6.Chemical Analysis Methods 3 6.1 Reagents and Materials 3 6.2 Instruments and Equipment 26 6.3 Determination of Loss on Ignition – Subtraction Method Based on Ignition Difference 30 6.4 Determination of Loss on Ignition of Slag Silicate Cement – Correction Method (Benchmark Method) 31 6.5 Determination of Sulfate Sulfate Sulfate – Barium Sulfate Weighing Method (Standard Method) 32 6.6 Determination of insoluble matter – Hydrochloric acid-sodium hydroxide treatment 33 6.7 Determination of Silicon Dioxide – Ammonium Chloride Weighing Method (Standard Method) 33 6.8 Determination of Ferric Oxide – o-Phenanthroline Spectrophotometric Method (Standard Method) 35 6.9 Determination of Alumina – Direct Titration of Iron and Aluminum Combination by EDTA (Standard Method) 36 6.10 Determination of Calcium Oxide – EDTA Titration Method (Primary Standard Method) 37 6.11 Determination of Magnesium Oxide – Atomic Absorption Spectrophotometry (Standard Method) 37 6.12 Determination of Titanium Dioxide – Diantipyrine Methane Spectrophotometric Method (Standard Method) 38 6.13 Determination of Chloride Ions – Potentiometric Titration (Standard Method) 39 6.14 Determination of Potassium Oxide and Sodium Oxide (Alkali Content) --- Flame Photometry (Standard Method) 40 6.15 Determination of Sulfur in Sulfides – Iodometric Method 41 6.16 Determination of Manganese Monoxide – Potassium Periodate Oxidation Spectrophotometric Method (Standard Method) 42 6.17 Determination of Phosphorus Pentoxide – Phosphomolybdic Blue Spectrophotometric Method (Standard Method) 43 6.18 Determination of Carbon Dioxide – Asbestos Absorption Weighing Method (Standard Method) 44 6.19 Determination of Zinc Oxide---Atomic Absorption Spectrophotometry 44 6.20 Determination of Fluoride Ions – Ion-Selective Electrode Method (Standard Method) 45 6.21 Determination of water-soluble alkali content---Flame photometry 46 6.22 Determination of Cement Alkalinity (pH Value) – Ion Selective Electrode Method 47 6.23 Determination of Silicon Dioxide – Potassium Fluorosilicate Titration Method (Substitution Method) 47 6.24 Determination of Ferric Oxide – Direct EDTA Titration (Substitute Method) 48 6.25 Determination of Ferric Oxide – Atomic Absorption Spectrophotometry (Substitute Method) 48 6.26 Determination of Alumina – Direct EDTA Titration (Substitute Method) 49 6.27 Determination of Alumina – Copper Sulfate Back Titration Method (Substitution Method) 50 6.28 Determination of Calcium Oxide – Sodium Hydroxide Melt Sample-EDTA Titration Method (Alternative Method) 50 6.29 Determination of Calcium Oxide – Potassium Permanganate Titration Method (Substitute Method) 51 6.30 Determination of Magnesium Oxide – EDTA Titration Difference Subtraction Method (Substitution Method) 52 6.31 Determination of Sulfur Trioxide in Sulfate – Iodometric Method (Substitute Method) 53 6.32 Determination of Sulfur Trioxide in Sulfate – Coulometric Titration (Substitute Method) 54 6.33 Determination of Sulfur Trioxide in Sulfate – Ion Exchange Method (Substitution Method) 55 6.34 Determination of Chloride Ions – Ammonium Thiocyanate Titration Method (Substitution Method) 56 6.35 Determination of Chloride Ions – Ion Chromatography (Alternative Method) 56 6.36 Determination of Potassium Oxide and Sodium Oxide (Alkali Content) --- Atomic Absorption Spectrophotometry (Substitute Method) 57 6.37 Determination of Manganese Monoxide – Atomic Absorption Spectrophotometry (Alternative Method) 58 6.38 Determination of Manganese Monoxide – Potassium Permanganate Titration Method (Substitute Method) 58 6.39 Determination of Phosphorus Pentoxide---Phosphogypsum-Molybdenum Yellow Spectrophotometric Method (Substitute Method) 59 6.40 Determination of Carbon Dioxide – Infrared Analysis (Substitute Method) 60 6.41 Determination of Fluoride Ions – Ion Chromatography (Alternative Method) 60 6.42 Determination of Free Calcium Oxide – Glycerol Method (Substitution Method) 61 6.43 Determination of Free Calcium Oxide – Ethylene Glycol Method (Substitution Method) 61 6.44 Determination of Free Calcium Oxide – Ethylene Glycol Extraction-EDTA Titration Method (Substitute Method) 62 6.45 Determination of Free Calcium Oxide – Conductivity Method (Substitute Method) 62 6.46 Determination of Loss on Ignition of Slag Silicate Cement – Correction Method (Substitute Method) 63 6.47 Determination of Total Sulfur in Silicate Cement Raw Meal 64 6.48 Permissible difference in the results of cement chemical analysis methods 64 7.X-ray fluorescence analysis method (substitute method) 66 7.1 Method Summary 66 7.2 Reagent 66 7.3 Instruments and Equipment 68 7.4 Conversion of determination results and correction of total analysis results in the presence of sulfides and halides 69 7.5 Preparation of Fused Sheets and Tablets 71 7.6 Calibration and Validation 73 7.7 Calculation and Representation of Results 78 7.8 Permissible difference of XRF measurement results 79 8.Inductively Coupled Plasma Emission Spectrometry (Substitute Method) 79 8.1 Method Summary 79 8.2 Reagent 80 8.3 Instruments and Equipment 83 8.4 Ferric oxide, aluminum oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide, zinc oxide, pentoxide Determination of diphosphorus 83 8.5 Determination of Sulfate Sulfate Trioxide 84 8.6 Determination of Silica 85 8.7 Permissible difference of ICP-OES measurement results. 85 Appendix A (Informative) Example of Calculating the Equivalent Point in Potentiometric Titration for Chloride Ion Determination 87 Appendix B (Informative) Reference Chromatographic Conditions and Chromatograms for Carbonate Eluents in Ion Chromatography 88 Appendix C (Informative) Examples of XRF Calibration Standard Samples and Monitoring Fused Strips and Pellets 89 Appendix D (Informative) Recommended wavelengths and detection limits for ICP-OES and flame atomic absorption spectrophotometry 90 References 91

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 176-2017 "Chemical Analysis Methods for Cement". Compared with GB/T 176-2017, the only changes are structural adjustments and editing. Aside from the sexual alterations, the main technical changes are as follows. a) The "Reproducibility Limit" was changed to "Permissible Difference within the Same Laboratory"; the "Reproducibility Limit" was changed to "Permissible Difference between Different Laboratories" (see 4.3). Versions 6.48, 7.8, and 8.7 (2017 versions. 4.3, 6.41, 7.7, and 8.6). b) The requirements for the preparation of cement and clinker samples and the drying requirements for cement raw meal samples have been added (see Chapter 5). c) The term "ammonium nitrate solution" has been changed to "nitric acid-ammonia water mixed solution" (see 6.1.33, 6.6.2, 6.29.2, and 6.1.33 in the.2017 version). 6.6.2, 6.26.2). d) The ignition temperature of ferric oxide has been changed (see 6.1.78, 7.2.1, and 6.1.73 and 7.2.1 in the.2017 edition). e) The determination of loss on ignition—the method of difference in ignition—has been modified. "Porcelain crucible" has been changed to "platinum crucible or porcelain crucible" (in case of dispute, the platinum crucible shall prevail). (See 6.3.2,.2017 edition of 6.3.2). f) The term “gravimetric method” has been changed to “weighing method” (see 6.5, 6.7, 6.18, and 6.5, 6.7, 6.18 in the.2017 edition). g) Added a rapid aging method for the solution in the determination of sulfate sulfur trioxide---barium sulfate weighing method (standard method), "or the beaker Place it in an 80℃ ultrasonic water bath for 10 minutes to settle and then cool it to room temperature (see 6.5). h) The term "Determination of Sulfides - Iodometric Method" has been changed to "Determination of Sulfur in Sulfides - Iodometric Method" (see 6.15,.2017 edition). 6.15). i) The method for "Determination of Chloride Ions - Potentiometric Titration (Substitute Method)" has been changed to a reference method; the method for "Determination of Chloride Ions - Ammonium Thiocyanate Capacitance" has been changed. The "benchmark method" has been changed to the substitution method (see 6.13, 6.34, and 6.13 and 6.31 in the.2017 edition). j) The determination of manganese monoxide has been added---potassium periodate oxidation spectrophotometry (standard method) for acid decomposition of samples (see 6.16.2.2). k) The sample decomposition method for the determination of phosphorus pentoxide—phosphomolybdic blue spectrophotometric method (standard method)—was modified to use concentrated hydrochloric acid, sulfuric acid, and hydrogen phosphate. After the sample was decomposed by hydrofluoric acid, the insoluble residue from the sodium carbonate-borax mixed flux was replaced with the sample decomposed by hydrochloric acid to control the acidity of the solution. (1.18±0.10) mol/L, using the phosphomolybdic blue spectrophotometric method (see 6.17,.2017 edition of 6.17). l) Added the determination of fluoride ions---ion-selective electrode method (standard method), sodium hydroxide molten sample, in case of dispute, sodium hydroxide is used. The molten sample shall be used as the standard (see 6.20.2.1). m) The determination of water-soluble alkali content has been added—flame photometry (see 6.21). n) The determination of cement alkalinity (pH value) has been added---ion-selective electrode method (see 6.22). o) The sample decomposition method in the determination of chloride ions—ion chromatography (alternative method)—has been modified. "Weigh approximately 1g of sample and add..." Add 30 mL of water, stir to completely disperse the sample, and add 0.5 mL of nitric acid while stirring. (This should be changed to. Weigh approximately 0.3 g of the sample and add...) Add 30 mL of water and stir to completely disperse the sample. While stirring, add 10 mL of nitric acid (1.10) (see 6.35.2,.2017 edition). 6.32.2). p) The determination of manganese monoxide---potassium permanganate titration method (alternative method) has been added (see 6.38). q) The determination of phosphorus pentoxide has been added---phosphorus vanadium molybdenum yellow spectrophotometric method (alternative method) (see 6.39). r) The determination of carbon dioxide has been added—infrared analysis (alternative method) (see 6.40). s) The determination of fluoride ions has been added—ion chromatography (alternative method) (see 6.41). t) The determination of free calcium oxide has been added—the conductivity method (alternative method) (see 6.45). u) The method summary, reagents, calibration, and validation for X-ray fluorescence analysis (XRF) have been revised, and sulfides and halides have been added. Conversion of measurement results and correction of total analysis results when they are present (see Chapter 7, Chapter 7 of the.2017 edition). v) Inductively coupled plasma optical emission spectrometry (ICP-OES) was added for the determination of silica (see 8.6). 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 National Testing & Inspection Group Co., Ltd., Anhui Conch Cement Co., Ltd., and ITECH. (Zhuji) Intelligent Equipment Co., Ltd., China Building Materials Testing & Certification Group Jiangsu Co., Ltd., Beijing Jianyetong Engineering Testing Technology Co., Ltd. Guangdong Jiaoke Testing Co., Ltd., China Power Construction Road & Bridge Group Co., Ltd., Tianshan Materials Co., Ltd., and Guizhou Shunkang Testing Co., Ltd. Company, Yunnan Provincial Building Materials Product Quality Inspection and Research Institute, Guangdong Guangye Inspection and Testing Group Co., Ltd., Rigaku Electric (Shanghai) Instrument Co., Ltd. Limited Company, Tianjin Jinbei Construction Engineering Testing Technology Co., Ltd., Tianjin Zhongyou Boxing Engineering Technology Co., Ltd., Zunyi City Product Quality Inspection and Testing Institute (Zunyi Comprehensive Inspection and Testing Center), Beijing Jinyu Energy Saving Technology Co., Ltd., and China Merchants Xinjiang Quality Inspection Technology Research Institute Limited Liability Company, Shandong Provincial Institute of Product Quality Inspection, Sichuan Esheng Cement Group Co., Ltd., Bruker (Beijing) Technology Co., Ltd. Inner Mongolia Autonomous Region Product Quality Inspection and Research Institute, Jidong Cement Tongchuan Co., Ltd., Heilongjiang Provincial Building Materials Industry Planning and Design Institute, Chengdu Product Quality Inspection and Research Institute Co., Ltd., Shanghai Menofo Technology Co., Ltd., Shandong Expressway Engineering Testing Co., Ltd., China Water Resources and Hydropower Fifth Engineering Bureau Co., Ltd., Shanghai Municipal Highway Engineering Testing Co., Ltd., and Shaoguan Municipal Bureau of Quality and Metrology Supervision and Testing, Guangdong Province Institute, Southern Testing & Certification Co., Ltd., Jiujiang Construction Engineering Quality Testing Center, Shentie Fangyuan Testing Technology Co., Ltd., Beijing Construction The following entities were established. First Engineering Quality Testing Co., Ltd., Guangdong Yihua Transportation Engineering Testing Co., Ltd., and the Highway Development Bureau of Baoding Municipal Transportation Bureau. Exhibition Center, Taike Technology Co., Ltd., China Energy Construction Road & Bridge Engineering Co., Ltd., Tongna Testing & Certification Group Co., Ltd., Sichuan Jiahua Jinping Special Equipment Co., Ltd. Cement Co., Ltd., Tianshui Zhongcai Cement Co., Ltd., Shanxi Zhuoyue Cement Co., Ltd., Tangxian Jidong Cement Co., Ltd. Hebei Kexi Instrument Equipment Co., Ltd., Hubei Chushengke Road & Bridge Technology Development Co., Ltd., Tailin Technology (Nantong, Jiangsu) Co., Ltd., Suzhou Xiangcheng Testing Co., Ltd., Wenzhou Xinda Transportation Engineering Testing Co., Ltd., Anhui Shengwei Engineering Testing Co., Ltd., Suzhou Heng Xinjian Construction Technology Development and Testing Co., Ltd., Kashi Jinyuan Water Conservancy and Hydropower Engineering Co., Ltd., Zhejiang Huazheng Testing Co., Ltd., Hefei Gong Large-scale engineering testing and inspection company, China Gold (Xi'an) Engineering Testing Co., Ltd., China Communications Second Harbor Engineering Co., Ltd., China Railway Fourth Bureau Group Co., Ltd. Bureau Group Co., Ltd., Ruoqiang Tianshan Cement Co., Ltd., Jiangxi Provincial Academy of Water Resources and Hydropower Research, China Merchants Chongqing Highway Engineering Testing Center Co., Ltd. The company, Zhejiang Anke Engineering Testing Co., Ltd., Chongqing Expressway Engineering Testing Co., Ltd., and Sichuan Kexin Construction Engineering Quality Testing and Appraisal Co., Ltd. Limited Company, Zhuji Hongtai Engineering Testing Co., Ltd., China Railway Ninth Bureau Group Engineering Testing and Experimentation Co., Ltd., Huizhou Water Group Zhenzhun Testing Center Co., Ltd., Xuzhou Construction Engineering Testing Center Co., Ltd., Nantong Yaohua Construction Engineering Quality Testing Co., Ltd., Hangzhou Smart Building Materials Technology Co., Ltd., Sichuan Junlian Southwest Cement Co., Ltd., Jiangsu Shanhe Cement Co., Ltd. The main drafters of this document are. Wang Wei, Song Xiaohui, Zhang Qinghua, Wang Ruihai, Wu Tiejun, Yuan Yibin, Cui Jian, Zhang Quanlei, Lu Juanjuan, and Dai Ping. Ding Sheng, Ma Zhaoxin, Guo Meng, Guo Hao, Ma Shixuan, Han Dayong, Wang Mingjian, Pan Hong, Shi Donghua, Feng Wangsheng, Wu Chaoli, Gu Xiaohua, Liu Jie, Yu Kexiao Zhang Huiqin, Li Liang, Zhang Bin, Deng Lei, Li Guangjun, Chen Qian, Feng Shutao, Feng Haijun, Qian Liming, Dong Xiaoli, Ding Feng, Ying Xiaohu, Liang Xuelian, Zhao Junhui Wang Chang'an, Wang Qi, Wang Yalan, Gao Dandan, Liu Yaojun, Liang Huichao, Liu Bo, Zhang Yuxi, Liu Yamin, Liu Xiaojing, Jiang Hao, Ren Jingyi, Li Yangtao Li Wei, Chen Bo, Wang Xiaojia, He Zhenzhong, Peng Qiong, Zhang Jian, Hu Huajian, Cheng Yunyun, Lu Haichuan, Kou Xiaojian, Zeng Kangyang, Li Yanning, Wu Jihua, Zhang Lei Huang Yaning, Qin Zhiqing, Zhang Xinsheng, Wang Wenru, Cao Yibin, Chen Zhitao, Wang Dong, Dai Gang, Shen Lizhong, Zhu Dong, Li Yuan, Tang Shenghu, Cui Feiyang Mo Weiqiang, Yang Shanwu, Ling Benchun, Wu Yongfeng, Chang Pengpeng, Ma Junliang, Duan Changhua, Lu Liyan, Zhao Guoyin, Zhan Guigui, Gu Xiaochun, Liu Yuqiang Fang Gang, Cao Jinpei, Du Tao, Chen Chifeng, Zhou Xiangrong, Wang Shengna, Chen Ziyang, Yan Min, Dong Jie, Zhao Wei, Fang Zhibin, Li Fan, Huang Xiumei, Li Chunxiang Xu Jianwei, Wang Chao, Zhang Wengui, Sun Xuemei, Tian Penglong, Li Zhongshan, Liu Liqing, Feng Hao, Tan Xiaojun, Wang Shun, Liu Chunyue, Wan Lipeng, Xu Yang, Sun Bing Xu Huanpeng, Liao Dan, Ding Zhenliang, Meng Lingxin, Cui Xiaojun, Wang Cunjiang, Tao Jianfei, Cui Xinfeng, Shao Xuequan, Jiang Tianxiao, Zhong Tingying, Yang Nenghui Wang Linlong, Liang Jianzhu, Chen Tong, Zeng Yonghua, Zheng Qiong, Li Quan, Ma Kai, Han Wei, Shen Hongmei, Zhang Yazhen, Yang Lin, Jiang Yonglei, Hu Bo, Che Weibin Wang Jiajia, Cheng Songfeng, Wang Danfeng, Wang Qiang, Liang Dongxu, Qian Ziheng, Hu Bihui, Zhang Yuanqiang, Zheng Mingzhu, Chen Huiyin, Huang Zunyun, Tian Chao, Cao Jianming. The release history of this document and the document it replaces is as follows. ---First published as GB/T 176-1956 in 1956, revised for the first time in 1962, revised for the second time in 1976, and revised for the third time in 1987. The first revision, the fourth revision in.1996; ---In the fifth revision in.2008, the content of GB/T 19140-2003 "General Rules for X-ray Fluorescence Analysis of Cement" was incorporated; ---Sixth revision in.2017; ---This is the seventh revision. Cement chemical analysis methods

1 Scope

This document describes the components of LOI, SO3, IR, SiO2, Fe2O3, Al2O3, CaO, MgO, TiO2, Cl-, K2O, Na2O, and S2- in cement. Methods for determining MnO, P2O5, CO2, ZnO, F-, water-soluble R2O, cement alkalinity (pH value), fCaO, and SrO. Cement chemical analysis methods. The method is further divided into the reference method and the substitute method. If multiple determination methods are provided for the same component, the reference method shall prevail in case of dispute. This document applies to the compositional analysis of silicate cement, clinker, and raw meal.

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 2007.1 General Rules for Sampling and Sample Preparation of Bulk Mineral Products - Manual Sampling Method GB/T 5762 Chemical Analysis Methods for Limestone, Quicklime and Hydrated Lime for Building Materials GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values GB/T 12573 Cement Sampling Method GB/T 15000 (All Parts) Standard Sample Working Guidelines JJG196 Verification Procedure for Commonly Used Glass Measuring Instruments

3 Terms and Definitions

The terms and definitions defined in GB/T 15000 (all parts) and the following terms and definitions apply to this document. 3.1 flake bead Glass discs used for analyzing molten samples using X-ray spectrometry. 3.2 Pelet tablets Compressed discs of finely ground samples for X-ray spectroscopy analysis. 3.3 A standard sample/standard substance having one or more specified characteristics determined using a metrologically valid procedure, accompanied by a certificate providing the specified characteristics. Statements of property values, their uncertainties, and metrological traceability. [Source. GB/T 15000.3-2023, 3.2] 3.4 Calibration sample calibrat Standard samples used for calibrating equipment or measurement procedures. [Source. GB/T 15000.3-2023, 3.7]

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