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GB/T 45777-2025 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 45777-2025: Evaluation method for admixture amount of gypsum in cement
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 45777-2025	189	Add to Cart	3 days	Evaluation method for admixture amount of gypsum in cement	Valid

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Basic data

Standard ID: GB/T 45777-2025 (GB/T45777-2025)
Description (Translated English): Evaluation method for admixture amount of gypsum in cement
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q11
Classification of International Standard: 91.100.10
Word Count Estimation: 9,986
Date of Issue: 2025-06-30
Date of Implementation: 2026-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 45777-2025: Evaluation method for admixture amount of gypsum in cement

---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/GBT45777-2025
ICS 91.100.10 CCSQ11 National Standard of the People's Republic of China Evaluation method of gypsum content in cement Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed by China Building Materials Federation. This document is under the jurisdiction of the National Technical Committee on Cement Standardization (SAC/TC184). This document was drafted by. China National Testing Holding Group Co., Ltd., Yantai Construction Engineering Testing Service Center Co., Ltd., Hefei Cement Research and Design Institute Co., Ltd., Tianjin PetroChina Boxing Engineering Technology Co., Ltd., Washi Cement Group Co., Ltd., Tianjin Sinoma Engineering Research Institute Research Center Co., Ltd., Quyang Jinyu Cement Co., Ltd., Datong Jidong Cement Co., Ltd., Guangxi Yunyan Special Cement Building Materials Co., Ltd. Arong Banner Mengxi Cement Co., Ltd., Jiangxi Anfu Southern Cement Co., Ltd., Guangdong Ruixing Environmental Technology Co., Ltd., Baoding Taihang Heyi Environmental Protection Technology Co., Ltd., Ulanhot Shengyi Commercial Concrete Co., Ltd., Jiangshan Hejiashan Cement Co., Ltd., Shandong Dongyuan New Materials Technology Co., Ltd., Xinfa Group, Inner Mongolia Chemical Vocational College, Jidong Cement Abaga Banner Co., Ltd., Yancheng Institute of Technology, Inner Mongolia Jidong Huida Environmental Protection Co., Ltd., Yangtze River Scientific Research Institute of Yangtze River Water Conservancy Commission, Beijing Guojian Lianxin Certification Center Co., Ltd., Jinan University, China Construction Science and Technology Group (Tianjin) Co., Ltd., Quzhou Hongyuan Engineering Testing Co., Ltd., Zhumadian Yulong Tongli Cement Co., Ltd., Guangzhou Water Science Research Institute Co., Ltd., Fuyun Tianshan Cement Co., Ltd., Jiangxi Huaheng Engineering Testing Co., Ltd., Tangshan Jingmai New Materials Technology Co., Ltd. company. The main drafters of this document are. Yin Xiangnan, Wang Xufang, Zhuang Zhongyi, Ding Hao, Wang Rong'e, Song Hao, Guo Fangjie, Zhu Haijin, Fan Daorong, Liu Qiao, Shi Weiji, Zeng Jianguo, Jia Chunli, Wang Jiulong, Huang Shaoheng, Hao Jinxiu, Liu Jizhong, Cao Qin, Hu Gang, Chen Jing, Ma Yuefei, Ye Ronghai, Ge Chengmin, Song Shiwei, Li Jiping, Wang Weiping, Shu Chao, Yin Zhifeng, Zhu Huajun, Zhang Liang, Shao Xiaomei, Chen Liang, Zhu Wei, Zhang Shengxin, Xiao Lei, Zeng Hui, Liu Bingzhen, Pan Yinbao, Zhou Chunhong, Xu Qiang, Lu Xiaolei, Yang Junjian, Chen Baorong, Wang Weizhi, Xiong Mijia, Ding Yuan, Xiao Jiafa, Guo Xu, Bao Tingting, Li Yan, Sun Jian, Liu Jinlong, Wang Changan, Liang Huichao, Lu Juanjuan, Liu Yaojun, Xu Xin, Wang Yalan, Yu Kexiao, Guo Meng, Wu Shasha, Liu Yamin, Zhang Yuxi, Ren Jingyi, Liu Jie, Duan Zhaohui, Li Chengshuai, Yu Hongyan, Yu Yuan, Xue Shujuan, and Chen Wenming. Evaluation method of gypsum content in cement

1 Scope

This document provides the principle of the evaluation method for gypsum content in cement, and specifies the instrumentation, test samples, test methods, evaluation process, Production control and evaluation reports. This document is applicable to the evaluation of gypsum content in general-purpose Portland cement and can be used as a reference for other types of cement.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 176 Chemical analysis methods for cement GB/T 1346 Test methods for water consumption, setting time and stability of cement of standard consistency GB/T 5484 Chemical analysis methods for gypsum GB/T 8074 Determination of specific surface area of cement - Blaine method GB/T 12959 Determination of heat of hydration of cement GB/T 17671 Test method for strength of cement mortar (ISO method) GB/T 21372 Portland cement clinker JC/T 603 Cement mortar shrinkage test method JC/T 1083 Test method for compatibility of cement and water reducing agent

3 Terms and Definitions

There are no terms or definitions that require definition in this document.

4 Principles

This method uses fixed raw materials (cement clinker, gypsum, mixed materials, etc.) provided by the enterprise to produce a certain type of cement. The small grinding test is carried out with the same gypsum dosage to test the cement setting time, hydration heat, strength, mortar shrinkage rate, compatibility with water reducer and other properties. The parameters are calculated and the relationship between them and the gypsum content is established. The optimal gypsum content in cement is evaluated by image evaluation or mathematical fitting evaluation. Adjust the gypsum content, gypsum type, cement temperature out of the mill, cement fineness, etc. to make the cement hydration exothermic curve of the large mill test consistent with the optimum gypsum content. The heat release curves of cement hydration in small-mill tests tend to be consistent, which can regulate the cement production process and optimize the performance of large-mill cement.

5 Instruments and Equipment

5.1 Standard test mill Comply with the requirements of GB/T 21372. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 45777-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 45777-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 45777-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 45777-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.