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GB/T 749-2008 English PDF

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GB/T 749-2008: Test method for determining capability of resisting sulfate corrode of cement
Status: Valid

GB/T 749: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 749-2008English259 Add to Cart 3 days [Need to translate] Test method for determining capability of resisting sulfate corrode of cement Valid GB/T 749-2008
GB/T 749-2001English239 Add to Cart 2 days [Need to translate] Test method for potential expansion of Portland cement mortars exposed to sulfate Obsolete GB/T 749-2001
GB/T 749-1965EnglishRFQ ASK 3 days [Need to translate] Sulphate resistance test for cement Obsolete GB/T 749-1965

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Basic data

Standard ID GB/T 749-2008 (GB/T749-2008)
Description (Translated English) Test method for determining capability of resisting sulfate corrode of cement
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Q11
Classification of International Standard 91.100.10
Word Count Estimation 11,165
Date of Issue 2008-06-30
Date of Implementation 2009-04-01
Older Standard (superseded by this standard) GB/T 2420-1981; GB/T 749-2001
Quoted Standard GB/T 5483; GB/T 6682; GB/T 17671-1999; JC/T 603-2004; JC/T 681; JC/T 738-2004
Adopted Standard ASTM C452-2006, NEQ
Regulation (derived from) National Standard Approval Announcement 2008 No.11 (Total No.124)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the cement sulphate resistance test method principle of the method, equipment, test material, mortar composition, specimens molding, specimens conservation and measurement, calculation with the results of treatment. The performance criteria include the potential expansion of immersion corrosion test methods and performance testing method two test methods. Performance test method which potential expansion (P Act) applies to the use of Portland cement and specify the methods of other varieties of cement. Immersion corrosion resistance test method (K Act) applies to cement designated by this method.

GB/T 749-2008: Test method for determining capability of resisting sulfate corrode 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 Q11 National Standards of People's Republic of China Replacing GB/T 749-2001, GB/T 2420-1981 Test method for anti - sulfate attack of cement 2008-06-30 release 2009-04-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is in line with ASTMC452-2006 "Test Method Standard for Potential Swelling Properties of Portland Cement in Sulfate Environment" Sexual degree is not equivalent. This standard replaces GB/T 749-2001 "Test Method for Potential Swelling Properties of Portland Cement in Sulfate Environments" and GB/T 2420-1981 "Cement anti-sulfate attack rapid test method" two standards. This standard and GB/T 749-2001, GB/T 2420-1981 compared to the main changes are as follows. --- Change the calculation formula of cement and gypsum to "7.0" to constant A. For Portland cement A is 7.0, other cement is required (GB/T 749-2001 version 7.2, version 3.5); --- test sand by the "GB 178-1977 meet the quality requirements of the standard sand" to "meet the GB/T 17671-1999 requirements of the grain Degree in the range of 0.5mm ~ 1.0mm of intermediate sand "(GB/T 2420-1981 in Chapter 7, the version 4.3.1); --- the temperature of the laboratory is changed from 17 to 25 ° C to "meet the requirements of 4.1 of GB/T 17671-1999" (GB/T 2420-1981 Chapter 9, Edition 4.2.8.1); --- The temperature of the curing box is changed from 20 ± 3 ℃ to "meet the requirements of 4.1 in GB/T 17671-1999" (GB/T 2420-1981 Chapter 10, Edition 4.2.8.1); --- soaking solution temperature from 20 ± 3 ℃ to 20 ℃ ± 1 ℃ (GB/T 2420-1981 in Chapter 12, the version 4.3.3); - the original standard "Figure 1 jack press" and "Figure 2 electric folding machine" to delete (GB/T 2420-1981 in Chapter 1 and Chapter 2, Edition 4.2.1 and 4.2.2) --- increase the requirements of the manual jack press "up and down the plate to be horizontal and the central part of the same line. Presses instead of "(GB/T 2420-1981, Chapter 1, Edition 4.2.1); --- SI system unified to SI international units (the full version of this version). This standard is proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Cement Standardization Technical Committee (SAC/TC184). This standard is responsible for drafting units. China Building Materials Science Research Institute, China Building Materials Inspection and Certification Center, China Building Materials Meeting. The main drafters of this standard. Liu Chen, Wang Xufang, Tian Hong, Yan Bilan, Jiang Lizhen, Wang Xin, Liu Sheng. This standard replaced the previous version of the standard situation. --- GB/T 749-1965, GB/T 749-2001; --- GB/T 2420-1981. Test method for anti - sulfate attack of cement

1 Scope

This standard specifies the cement abrasion resistance test method method principle, equipment, test materials, plastic sand composition, test body molding, Test body maintenance and measurement, calculation and results processing. This standard includes two methods of testing the potential expansion performance test method and the immersion resistance test method, among which the potential expansion performance test Test method (P method) Suitable for Portland cement and other types of cement specified by this method. Test method for soaking corrosion resistance (K method) Suitable Used to specify the cement to use this method.

2 normative reference documents

The terms of the following documents are incorporated by reference in this standard and are the terms of this standard. Any reference to the date of the document, (Excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard Whether the latest version of these files can be used, and the most recent version of the referenced document, which is not dated, applies to this standard. GB/T 5483 Gypsum and anhydrite GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Test method for strength of cement mortar (ISO method) (idt ISO 679. 1989) GB/T 17671-1999 Test method for dry shrinkage of cement mortar JC/T 603-2004 JC/T 681 planetary cement mortar mixer Test method for rapid strength of cement JC/T 738-2004 3 Potential expansion test method (P method) 3.1 Principle of the method By adding a certain amount of dihydrate gypsum in the cement, so that the total content of cement in the SO3 reached a specified amount, making excessive SO42- direct And the impact of cement on the performance of the sulfate resistance of the expansion of the reaction, and then measured by measuring the age of the expansion of the specimen to measure the water Potential anti - sulfate properties of clay. 3.2 Instruments and equipment 3.2.1 sand mixer Compliance with JC/T 681. 3.2.2 test mode, nail head, pound rod, longer than the long, three edge scraper, measuring cylinder Meet the requirements of JC/T 603-2004 Chapter 4 instruments and equipment. 3.2.3 balance 3.2.3.1 Weigh the gypsum with a balance The maximum weighing not less than 500g, grading value of not more than 0.5g. 3.2.3.2 Weigh the balance of cement and test sand The maximum weighing not less than.2000g, grading value of not more than 2g. 3.3 Test materials 3.3.1 Test sand In line with GB/T 17671-1999 requirements of the particle size range of 0.5mm ~ 1.0mm of the intermediate sand. 3.3.2 gypsum Chemical pure dihydrate gypsum or meet the GB/T 5483 requirements of the G class gypsum, fineness requirements in Table 1.

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