GB/T 42277-2022 English PDF

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GB/T 42277-2022: Test method for carbonation of cement mortar
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42277-2022	159	Add to Cart	3 days	Test method for carbonation of cement mortar	Valid

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Basic data

Standard ID: GB/T 42277-2022 (GB/T42277-2022)
Description (Translated English): Test method for carbonation of cement mortar
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q11
Classification of International Standard: 91.100.10
Word Count Estimation: 7,718
Date of Issue: 2022-12-30
Date of Implementation: 2023-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42277-2022: Test method for carbonation of cement mortar

---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 People's Republic of China Test method for carbonation of cement mortar Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

foreword

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 contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Building Materials Federation. This document is under the jurisdiction of the National Cement Standardization Technical Committee (SAC/TC184). This document is drafted by. China Building Materials Research Institute Co., Ltd., China Railway Jingcheng Engineering Inspection Co., Ltd., China Seventeenth Metallurgical Co., Ltd. Group Co., Ltd., Chongqing University, China Construction Eighth Bureau First Construction Co., Ltd., Shenzhen University, East China Jiaotong University, Xinjiang Agricultural University, China Communications Second Public Bureau Sixth Engineering Co., Ltd., China Construction Xinjiang Construction Engineering (Group) Co., Ltd., Beijing University of Technology, China Railway 23rd Bureau Group Third Engineering Co., Ltd. Co., Ltd., Yellow River Survey, Planning, Design and Research Institute Co., Ltd., Shandong Hi-Speed Engineering Inspection Co., Ltd., Shenyang Urban Science Engineering Inspection and Consulting Co., Ltd. Company, Sinochem Transportation Construction Group Co., Ltd., Guizhou Provincial Building Materials Product Quality Inspection and Testing Institute, CITIC Construction Co., Ltd., Songhua River Wang Xinlu, Zhao Junhui, Zhao Xiaofeng, Luo Huamin, Li Qiang, Wang Guangzhou, Chen Qian, Sun Wenbo, Deng Yafen, Zhai Meng, Yan Yusong. Test method for carbonation of cement mortar Warning. There are potential dangers in this test. During the test, attention should be paid to the storage conditions of carbon dioxide gas and the safety of use, so as to avoid improper use. Injury to the operator; the test should be carried out in accordance with the relevant laboratory gas management and use operation requirements.

1 Scope

This document specifies the principle, test conditions, instruments and equipment, test materials, test procedures and data of the cement mortar carbonation test method. deal with. This document is applicable to the determination of the degree of carbonization of cement mortar specimens in a certain concentration of carbon dioxide gas medium.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 6052 Industrial Liquid Carbon Dioxide GB/T 17671 Test method for cement mortar strength (ISO method) GB/T 50082 Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete JC/T 724 cement mortar electric flexural testing machine JG/T 247 Concrete Carbonation Test Chamber

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 principles

After the hardened cement mortar specimens were subjected to the carbonization of carbon dioxide, the alkalinity in the carbonized area decreased and tended to be neutral. The neutral and alkaline interface of the test piece section is used to measure the carbonation zone depth of the cement mortar test piece subjected to the action of carbon dioxide, so as to characterize the carbon resistance of the cement Chemical.

5 Test conditions

5.1 The environmental conditions of the laboratory for the preparation of cement mortar test pieces shall comply with the provisions of GB/T 17671. 5.2 The temperature of the carbonization test room is controlled at 15°C~30°C, and the relative humidity is within (60±15)%.

6 Instruments and equipment

6.1 Balance The maximum measuring range is not less than.2000g, and the division value is not more than 1g. ......

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