Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIAN BIAO HAN [2011] No.17 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the ‘Plan 2011 on the development and revision of engineering construction standards and codes (first batch)’, the drafting group has revised this standard through extensive investigation and study, careful summarization of practical experience and consultation with relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are: 1. General provisions; 2. Terms and symbols; 3. Basic requirements; 4. Raw materials; 5. Properties of alkali-activated slag concrete; 6. Design of mix proportion; 7. Construction; 8. Quality inspection and acceptance.
The Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard; Chongqing University is responsible for the explanation of specific technical contents. If there are any comments or suggestions during the implementation of this standard, please send them to the College of Materials Science and Engineering of Chongqing University (Address: No.83 Shapingba North Street, Chongqing, 400045, China).
Technical standard for application of alkali-activated slag concrete
1 General provisions
1.0.1 This standard is formulated with a view to standardize the engineering application of alkali-activated slag concrete (AASC), achieve advanced technology, safety and reliability, economy and rationality, save energy and recycle waste, and ensure the engineering quality.
1.0.2 This standard is applicable to raw material quality control, mix proportion design, construction, quality inspection and acceptance of AASC.
1.0.3 In addition to this standard, the application of AASC shall also meet those specified in the current relevant standards of China.
2 Terms and symbols
2.1 Terms
2.1.1
alkali-activated slag binder
hydraulic binders prepared with alkalis and ground water-quenched blast furnace slag as main raw materials, which can be classified into two types: one-component alkali-activated slag binder which is prepared by mixing alkalis and water-quenched blast furnace slag powder in proportion; two-component alkali-activated slag binder which is prepared and stored by alkalis and water-quenched blast furnace slag powder respectively
2.1.2
alkalis
component of alkali-activated slag binder used to activate the potential activity of slag powder, including hydroxides containing alkali metal elements, soluble silicates, carbonates, etc.
2.1.3
alkali-activated slag concrete (AASC)
concrete made of alkali-activated slag binder, sand, stone and water as main raw materials
2.1.4
water-binder ratio
mass ratio of water consumption in concrete to binder content
2.1.5
solution-binder ratio
mass ratio of alkali solution to slag powder
2.1.6
binder content
sum of the amount of alkali-activated slag binder and mineral admixture in every cubic meter of concrete
2.2 Symbols
2.2.1 Strength
fcu, 0——Concrete confected intensity;
fcu, k——Standard value of compressive strength of concrete cube;
fb——Measured value of 28d compressive strength of binder;
fcu, i——Representative value of compressive strength of group i specimens;
fcu, m——Average value of compressive strength of n groups of specimens.
2.2.2 Calculation coefficients and others
n——Number of specimen groups;
W/B——Water-binder ratio of concrete;
αa, αb——Regression coefficient;
σ——Standard deviation of concrete strength.
3 Basic requirements
3.0.1 The mechanical properties and durability of AASC shall meet the requirements of the current national standard GB 50010 Code for design of concrete structures in addition to the provisions of this standard; the alkali content of AASC should be 3% to 7% of the total amount of binder, which shall be calculated by Na2O equivalent.
3.0.2 The radioactivity of AASC used in construction engineering shall meet the requirements of the current national standard GB 6566 Limits of radionuclides in building materials.
3.0.3 The alkali-activated slag concrete shall be stirred by forced mixer.
3.0.4 During the production and construction of AASC, operating personnel shall be equipped with protective glasses, protective gloves and rain boots, and shall not be in direct contact with fresh concrete or alkalis.
3.0.5 The same type of alkali-activated slag concrete shall be used for the same structure.
3.0.6 Containers or packages for storing alkalis shall be provided with warning signs.
3.0.7 Anti-crack structural measures such as anti-crack reinforcement and anti-crack net should be added in the structural design of AASC.
3.0.8 The wastewater of AASC should be recycled and equipped with an independent wastewater recovery system; the discharge of wastewater from production and construction shall meet the requirements of the current national standard GB 8978 Integrated wastewater discharge standard.
3.0.9 Containers for storing alkalis solution shall be equipped with heating and stirring devices and shall have heat preservation function.
4 Raw materials
4.1 Alkali-activated slag binder
4.1.1 Raw materials for alkali-activated slag binder shall meet the following requirements:
1 The activity index of ground granulated blast furnace slag should not be lower than S95 grade, and other properties shall meet the requirements of the current national standard GB/T 18046 Ground granulated blast furnace slag used for cement, mortar and concrete.
2 The alkalis shall be hydroxide containing alkali metal element or soluble silicate, and its properties shall meet the requirements of the current national standards GB/T 209 Sodium hydroxide for industrial use and GB/T 4209 Sodium silicate for industrial use. For the two-component alkali-activated slag binder, the content of Na2O, SiO2 and other components of the alkalis shall be within 5% of the relative amount of the production control value.
4.1.2 The strength of alkali-activated slag binder is divided into three grades: 42.5, 52.5 and 62.5, and its properties shall meet those specified in Table 4.1.2.
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Basic requirements
4 Raw materials
4.1 Alkali-activated slag binder
4.2 Fine aggregate
4.3 Coarse aggregate
4.4 Mineral admixture
4.5 Chemical admixture
4.6 Mixing water
5 Properties of alkali-activated slag concrete
5.1 Properties of fresh concrete
5.2 Mechanical properties
5.3 Long-term property and durability
6 Design of mix proportion
6.1 General requirements
6.2 Determination of AASC confected intensity
6.3 Calculation of AASC mix proportion
6.4 Adjustment and determination of AASC mix proportion
7 Construction
7.1 General requirements
7.2 Metering of raw materials
7.3 Mixing of raw materials
7.4 Transportation of fresh concrete
7.5 Casting of concrete
7.6 Formwork removal
7.7 Curing
8 Quality inspection and acceptance
8.1 Quality inspection of raw materials
8.2 Property inspection of fresh AASC
8.3 Property inspection of hardened AASC
8.4 Acceptance of AASC engineering
Annex A Testing methods for alkali-activated slag binder
Explanation of wording in this standard
List of quoted standards
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIAN BIAO HAN [2011] No.17 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the ‘Plan 2011 on the development and revision of engineering construction standards and codes (first batch)’, the drafting group has revised this standard through extensive investigation and study, careful summarization of practical experience and consultation with relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are: 1. General provisions; 2. Terms and symbols; 3. Basic requirements; 4. Raw materials; 5. Properties of alkali-activated slag concrete; 6. Design of mix proportion; 7. Construction; 8. Quality inspection and acceptance.
The Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard; Chongqing University is responsible for the explanation of specific technical contents. If there are any comments or suggestions during the implementation of this standard, please send them to the College of Materials Science and Engineering of Chongqing University (Address: No.83 Shapingba North Street, Chongqing, 400045, China).
Technical standard for application of alkali-activated slag concrete
1 General provisions
1.0.1 This standard is formulated with a view to standardize the engineering application of alkali-activated slag concrete (AASC), achieve advanced technology, safety and reliability, economy and rationality, save energy and recycle waste, and ensure the engineering quality.
1.0.2 This standard is applicable to raw material quality control, mix proportion design, construction, quality inspection and acceptance of AASC.
1.0.3 In addition to this standard, the application of AASC shall also meet those specified in the current relevant standards of China.
2 Terms and symbols
2.1 Terms
2.1.1
alkali-activated slag binder
hydraulic binders prepared with alkalis and ground water-quenched blast furnace slag as main raw materials, which can be classified into two types: one-component alkali-activated slag binder which is prepared by mixing alkalis and water-quenched blast furnace slag powder in proportion; two-component alkali-activated slag binder which is prepared and stored by alkalis and water-quenched blast furnace slag powder respectively
2.1.2
alkalis
component of alkali-activated slag binder used to activate the potential activity of slag powder, including hydroxides containing alkali metal elements, soluble silicates, carbonates, etc.
2.1.3
alkali-activated slag concrete (AASC)
concrete made of alkali-activated slag binder, sand, stone and water as main raw materials
2.1.4
water-binder ratio
mass ratio of water consumption in concrete to binder content
2.1.5
solution-binder ratio
mass ratio of alkali solution to slag powder
2.1.6
binder content
sum of the amount of alkali-activated slag binder and mineral admixture in every cubic meter of concrete
2.2 Symbols
2.2.1 Strength
fcu, 0——Concrete confected intensity;
fcu, k——Standard value of compressive strength of concrete cube;
fb——Measured value of 28d compressive strength of binder;
fcu, i——Representative value of compressive strength of group i specimens;
fcu, m——Average value of compressive strength of n groups of specimens.
2.2.2 Calculation coefficients and others
n——Number of specimen groups;
W/B——Water-binder ratio of concrete;
αa, αb——Regression coefficient;
σ——Standard deviation of concrete strength.
3 Basic requirements
3.0.1 The mechanical properties and durability of AASC shall meet the requirements of the current national standard GB 50010 Code for design of concrete structures in addition to the provisions of this standard; the alkali content of AASC should be 3% to 7% of the total amount of binder, which shall be calculated by Na2O equivalent.
3.0.2 The radioactivity of AASC used in construction engineering shall meet the requirements of the current national standard GB 6566 Limits of radionuclides in building materials.
3.0.3 The alkali-activated slag concrete shall be stirred by forced mixer.
3.0.4 During the production and construction of AASC, operating personnel shall be equipped with protective glasses, protective gloves and rain boots, and shall not be in direct contact with fresh concrete or alkalis.
3.0.5 The same type of alkali-activated slag concrete shall be used for the same structure.
3.0.6 Containers or packages for storing alkalis shall be provided with warning signs.
3.0.7 Anti-crack structural measures such as anti-crack reinforcement and anti-crack net should be added in the structural design of AASC.
3.0.8 The wastewater of AASC should be recycled and equipped with an independent wastewater recovery system; the discharge of wastewater from production and construction shall meet the requirements of the current national standard GB 8978 Integrated wastewater discharge standard.
3.0.9 Containers for storing alkalis solution shall be equipped with heating and stirring devices and shall have heat preservation function.
4 Raw materials
4.1 Alkali-activated slag binder
4.1.1 Raw materials for alkali-activated slag binder shall meet the following requirements:
1 The activity index of ground granulated blast furnace slag should not be lower than S95 grade, and other properties shall meet the requirements of the current national standard GB/T 18046 Ground granulated blast furnace slag used for cement, mortar and concrete.
2 The alkalis shall be hydroxide containing alkali metal element or soluble silicate, and its properties shall meet the requirements of the current national standards GB/T 209 Sodium hydroxide for industrial use and GB/T 4209 Sodium silicate for industrial use. For the two-component alkali-activated slag binder, the content of Na2O, SiO2 and other components of the alkalis shall be within 5% of the relative amount of the production control value.
4.1.2 The strength of alkali-activated slag binder is divided into three grades: 42.5, 52.5 and 62.5, and its properties shall meet those specified in Table 4.1.2.
Contents of JGJ/T 439-2018
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Basic requirements
4 Raw materials
4.1 Alkali-activated slag binder
4.2 Fine aggregate
4.3 Coarse aggregate
4.4 Mineral admixture
4.5 Chemical admixture
4.6 Mixing water
5 Properties of alkali-activated slag concrete
5.1 Properties of fresh concrete
5.2 Mechanical properties
5.3 Long-term property and durability
6 Design of mix proportion
6.1 General requirements
6.2 Determination of AASC confected intensity
6.3 Calculation of AASC mix proportion
6.4 Adjustment and determination of AASC mix proportion
7 Construction
7.1 General requirements
7.2 Metering of raw materials
7.3 Mixing of raw materials
7.4 Transportation of fresh concrete
7.5 Casting of concrete
7.6 Formwork removal
7.7 Curing
8 Quality inspection and acceptance
8.1 Quality inspection of raw materials
8.2 Property inspection of fresh AASC
8.3 Property inspection of hardened AASC
8.4 Acceptance of AASC engineering
Annex A Testing methods for alkali-activated slag binder
Explanation of wording in this standard
List of quoted standards
