GB 50119: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 50119-2013 | English | RFQ |
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3 days [Need to translate]
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Code for concrete admixture application
| Valid |
GB 50119-2013
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| GB 50119-2003 | English | RFQ |
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9 days [Need to translate]
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Code for utility technical of concrete admixture
| Obsolete |
GB 50119-2003
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PDF similar to GB 50119-2013
Standard similar to GB 50119-2013 GB/T 23265 GB/T 27690 GB/T 26751 Basic data | Standard ID | GB 50119-2013 (GB50119-2013) | | Description (Translated English) | Code for concrete admixture application | | Sector / Industry | National Standard | | Classification of Chinese Standard | Q12 | | Classification of International Standard | 91.100.10 | | Word Count Estimation | 114,146 | | Older Standard (superseded by this standard) | GB 50119-2003 | | Quoted Standard | GB/T 50081; GB/T 50107; GB 50164; GB 175; GB 200; GB 700; GB 1499.2; GB/T 1596; GB 8076; GB/T 17671; GB/T 18046; GB/T 18736; GB 23439; JGJ 52; JGJ 55; JGJ/T 104; JGJ/T 178-2009; JGJ/T 192; JC/T 218; JC 474; JC 475; JC 477; JC/T 681; JGJ 63 | | Regulation (derived from) | Announcement of the Ministry of Housing and Urban No. 110 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard applies to ordinary water, superplasticizer, polycarboxylate superplasticizer, diversion agents, air entraining water reducer, early strength agent, retarder, pumping agent, antifreeze, accelerating agents, bulking agents, waterproofing agen | GB 50119-2013: Code for concrete admixture application---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.
1 General
1.0.1 This specification is formulated to standardize the application of concrete admixtures, improve concrete performance, meet design and construction requirements, ensure the quality of concrete projects, and achieve advanced technology, safety and reliability, economical rationality, energy conservation and environmental protection.
1.0.2 This specification is applicable to ordinary water reducer, high-efficiency water reducer, polycarboxylate high-performance water reducer, air-entraining agent, air-entraining water reducer, early strength agent, retarder, pumping agent, antifreeze Application of additives, accelerators, expansion agents, waterproofing agents and rust inhibitors in concrete engineering.
1.0.3 The application of concrete admixtures in concrete engineering shall not only comply with this code, but also comply with the current relevant national standards.
2 Terms and symbols
2.1 Terminology
2.1.1 Shrinkage-reducing type polycarboxylate superplasticizer shrinkage-reducing type polycarboxylate superplasticizer
28d Polycarboxylate high-performance water reducer with a shrinkage ratio not greater than 90%.
2.1.2 Compatibility compatibility between water reducing admixtures and other concrete raw materials
When concrete admixtures containing water-reducing components are matched with cementitious materials, aggregates, and other admixtures, the fluidity of the mixture and its degree of change over time.
2.2 Symbols
E - modulus of elasticity (MPa) of the restrained reinforcement;
h0——the initial reading of the height of the test piece (mm);
ht——the height reading (mm) of the specimen when the age is t;
h - the reference height of the test piece (mm);
L——Initial length measurement value (mm);
L0 - the reference length of the test piece (mm);
Lt—measured value of the length of the specimen at the age measured (mm);
σ—expansion or contraction stress (MPa);
ε——restricted expansion rate of the measured age (%);
εt——vertical expansion rate (%);
μ—reinforcement ratio (%).
3 Basic Regulations
3.1 Selection of admixtures
3.1.1 The type of admixture should be selected according to the design and construction requirements and the main function of the admixture.
3.1.2 When different suppliers and different types of admixtures are used at the same time, they should be verified by tests, and the performance of the concrete should meet the design and construction requirements before use.
3.1.3 Concrete admixtures containing hexavalent chromium salts, nitrites and thiocyanates are strictly prohibited from being used in drinking water projects for concrete that is in direct contact with drinking water
3.1.4 Early-strength ordinary water reducers, early-strength agents, antifreeze agents and waterproofing agents containing strong electrolyte inorganic salts are strictly prohibited for the following concrete structures.
1 Concrete structure in contact with galvanized steel or aluminum and iron;
2 Concrete structures with exposed steel bars and embedded iron parts without protective measures;
3 Concrete structures using DC power;
4 Concrete structures within 100m from high-voltage DC power supply
3.1.5 Early-strength ordinary water-reducing agents, early-strength agents, waterproofing agents and chloride-salt antifreezes containing chloride salts are strictly prohibited for use in prestressed concrete, reinforced concrete and steel fiber concrete structures
3.1.6 Early-strength ordinary water-reducing agents and early-strength agents containing ammonium nitrate and ammonium carbonate, and antifreeze agents containing ammonium nitrate, ammonium carbonate and urea are strictly prohibited to be used in construction projects with personnel activities such as offices and residences
3.1.7 Early-strength ordinary water-reducing agents, early-strength agents, antifreeze agents and nitrite-containing rust inhibitors containing nitrite and carbonate are strictly prohibited for use in prestressed concrete structures
3.1.8 The cement used for concrete with admixtures shall comply with the current national standards "General Portland Cement" GB 175 and "Medium Heat Portland Cement, Low Heat Portland Cement, Low Heat Slag Portland Cement" GB.200; The sand and stone used in admixture concrete shall comply with the current industry standard "Sand and Stone Quality and Inspection Method Standard for Ordinary Concrete" JGJ 52; Standards "Fly Ash Used in Cement and Concrete" GB/T 1596 and "Granulated Blast Furnace Slag Powder Used in Cement and Concrete" GB/T 18046, and the compatibility of admixtures and concrete raw materials should be checked Sex, should meet the requirements before use. The water used for concrete with admixtures includes mixing water and curing water, which shall comply with the provisions of the current industry standard "Concrete Water Standard" JGJ 63.Silica fume should comply with the provisions of the current national standard "Mineral Admixtures for High-Strength and High-Performance Concrete" GB/T 18736.
3.1.9 Concrete mixed with admixtures for trial use shall use the raw materials actually used in the project. The testing items shall be determined according to the design and construction requirements. The testing conditions shall be the same as the construction conditions. trial match.
3.2 Dosage of admixture
3.2.1 The amount of admixture should be expressed as a percentage of the mass of the admixture to the total mass of the cementitious material in the concrete.
3.2.2 The dosage of admixture should be determined according to the recommended dosage of the supplier, and the raw materials and mixing ratio actually used in the project should be used and determined through tests. When the other raw materials of concrete or the use environment change, the concrete mix ratio and the amount of admixture can be adjusted.
3.3 Quality control of admixtures
3.3.1 When the admixture enters the site, the supplier shall provide the following quality certification documents to the buyer.
1 Type inspection report;
2 factory inspection report and certificate of conformity;
3 Product manual.
3.3.2 When the admixture enters the site, the same supplier and the same type of admixture shall be inspected and accepted according to the inspection items and inspection batches specified in this specification for each type of admixture, and the inspection samples shall be randomly selected. The inspection method of admixtures entering the factory shall comply with the provisions of the current national standard "Concrete Admixtures" GB 8076; the expansion agent shall comply with the provisions of the current national standard "Concrete Expansion Agents" GB 23439; The additives should meet the current industry standards "Concrete Antifreeze" JC 475, "Accelerator for Shotcrete" JC 477, "Concrete Waterproofing Agent" JC 474 and "Technical Regulations for the Application of Steel Rust Inhibitor" JGJ/T 192.The bulk purchase of admixtures should be consistent with the reserved samples, and should be used after passing the inspection.
3.3.3 The admixtures that have passed the entry inspection should be stored separately according to different suppliers, different varieties and different grades, and the labels should be clear.
3.3.4 When the supplier, batch, place of origin and grade of the same type of admixture change, the buyer should re-inspect the admixture, and it should be qualified and meet the design and construction requirements before use.
3.3.5 Powdered admixtures should be prevented from being wetted and agglomerated. When there are agglomerates, they should be inspected. The qualified ones should be crushed until they all pass through a square hole sieve with a nominal diameter of 630 μm before use; liquid admixtures should be stored in airtight containers, and should be sunscreen and antifreeze. When there is precipitation, peculiar smell, floating and other phenomena, it should be used after passing the inspection.
3.3.6 Before the admixture metering system is put into use, it should be calibrated before use. The label should be clear, the metering should be accurate, and the metering tolerance should be ±1%.
3.3.7 Safety protection measures should be taken according to different types and varieties of admixtures during storage, transportation and use.
4 Ordinary water reducer
4.1 Variety
4.1.1 Common water reducing agents such as calcium lignosulfonate, sodium lignosulfonate and magnesium lignosulfonate can be used in concrete works.
4.1.2 Early-strength ordinary water-reducer compounded by early-strength agent and ordinary water-reducer can be used in concrete engineering.
4.1.3 Concrete engineering can use lignosulfonate and polyol water reducing agents (including sugar calcium and oligosaccharide retarding water reducers), and lignosulfonate and polyol water reducing agents. It is a retarded ordinary water reducer compounded with a retarder and a retarder.
4.2 Scope of application
4.2.1 Ordinary water reducing agents should be used for concrete with daily minimum temperature above 5°C and strength grade below C40.
4.2.2 Ordinary water reducing agents should not be used alone for steam-cured concrete.
6.4.7 The polycarboxylate high-performance water reducer should be added according to the dosage specified in the concrete construction mix ratio.
6.4.8 When using polycarboxylate high-performance water reducing agent to produce concrete, the changes in sand and stone water content, mud content and mud content should be controlled.
6.4.9 Concrete mixed with polycarboxylate high-performance water reducer should be uniformly mixed with a forced mixer. The minimum time for concrete mixing can meet the requirements in Table 6.4.9.When mixing concrete with strength grade C60 and above, the mixing time should be extended appropriately.
Table 6.4.9 Minimum time for concrete mixing (s)
6.4.10 Concrete mixers, transport tank trucks, pump trucks and other equipment that have been mixed with other types of water reducing agents should be cleaned before mixing and transporting concrete mixed with polycarboxylate-based high-performance water reducing agents.
6.4.11 When using standard or retarded polycarboxylate high-performance water reducer, when the ambient temperature is lower than 10°C, measures should be taken to prevent the concrete slump from increasing over time.
7 Air-entraining agent and air-entraining superplasticizer
7.1 Variety
7.1.1 The following air-entraining agents can be used in concrete works.
1 Rosin resins such as rosin thermopolymer, rosin soap and modified rosin soap;
2 Dodecyl sulfonate, alkylbenzene sulfonate, petroleum sulfonate and other alkyl and alkyl aromatic hydrocarbon sulfonates;
3 Sodium fatty alcohol polyoxyethylene sulfonate, sodium fatty alcohol sulfate and other fatty alcohol sulfonates;
4 Fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and other nonionic polyethers;
5 Saponins such as triterpene saponins;
6 Compounds of different types of air-entraining agents.
7.1.2 The air-entraining and water-reducing agent compounded by air-entraining agent and water-reducing agent can be used in concrete engineering.
7.2 Scope of application
7.2.1 Air-entraining agent and air-entraining superplasticizer should be used in concrete with freeze-thaw resistance requirements, pumped concrete and concrete prone to bleeding.
7.2.2 Air-entraining agent and air-entraining water reducer can be used for impervious concrete, sulfate-resistant concrete, lean concrete, lightweight aggregate concrete, artificial sand concrete and concrete with finishing requirements.
7.2.3 Air-entraining agent and air-entraining superplasticizer should not be used in steam-cured concrete and prestressed concrete. If necessary, it should be determined by experiment.
8.1.1 Concrete works may adopt...
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