GB/T 20472-2006 Sulphoaluminate cement English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 20472-2026
Sulphoaluminate cement
硫铝酸盐水泥
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Designation
5 Constituent Materials
6 Grades
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Packaging, Marking, Transport and Storage
Sulphoaluminate cement
1 Scope
This document specifies the classification and designation, constituent materials, grades, technical requirements, inspection rules, packaging, marking, transport and storage for sulphoaluminate cement, and describes the corresponding test methods.
This document is applicable to sulphoaluminate cement.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 203, Granulated blastfurnace slag for use in cement
GB/T 205, Methods for chemical analysis of aluminate cement
GB/T 1346, Test methods for water requirement of normal consistency, setting time and soundness of cement
GB/T 1596, Fly ash for use in cement and concrete
GB/T 2419, Test method for fluidity of cement mortar
GB/T 5483, Natural gypsum
GB/T 5762, Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry
GB 6566, Limits of radionuclides in building materials
GB/T 8074, Testing method for specific surface of cement — Blaine method
GB/T 9774, Cement packing bags
GB/T 12573, Method for sampling cement
GB/T 12959, Test methods for heat of hydration of cement
GB/T 17671, Test method of cement mortar strength (ISO method)
GB/T 18046, Granulated blast furnace slag powder for use in cement, mortar and concrete
JC/T 313, Test method for expansion ratio of expansive cement
JC/T 453, Test methods for physical properties of self-stressing cement
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
self-stressing ordinary sulphoaluminate cement
hydraulic cementitious material with expansive properties, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum
3.2
rapid ordinary sulphoaluminate cement
hydraulic cementitious material with high early strength, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum, a small amount of limestone, and/or a small amount of slag (powder) and fly ash
3.3
low alkalinity ordinary sulphoaluminate cement
hydraulic cementitious material with low alkalinity, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum and a relatively large amount of limestone
3.4
low heat high-silicon sulphoaluminate cement
hydraulic cementitious material with low heat of hydration, made by intergrinding high-silicon sulphoaluminate cement clinker with an appropriate amount of gypsum, limestone, slag (powder) and/or fly ash
3.5
rapid and low shrinkage high-silicon sulphoaluminate cement
hydraulic cementitious material with rapid setting, rapid early hardening and low shrinkage properties, made by intergrinding high-silicon sulphoaluminate cement clinker with an appropriate amount of gypsum, slag (powder) and/or fly ash
4 Classification and Designation
4.1 Sulphoaluminate cement is classified according to the mineral composition of the clinker used into ordinary sulphoaluminate cement and high-silicon sulphoaluminate cement.
4.2 Ordinary sulphoaluminate cement is classified by performance into self-stressing ordinary sulphoaluminate cement (designated S·OSAC), low alkalinity ordinary sulphoaluminate cement (designated L·OSAC) and rapid ordinary sulphoaluminate cement (designated R·OSAC).
4.3 High-silicon sulphoaluminate cement is classified by performance into low heat high-silicon sulphoaluminate cement (designated LH·HSAC) and rapid and low shrinkage high-silicon sulphoaluminate cement (designated LS·HSAC).
5 Constituent Materials
5.1 Sulphoaluminate cement clinker
5.1.1 Sulphoaluminate cement clinker is classified into ordinary sulphoaluminate cement clinker and high-silicon sulphoaluminate cement clinker.
5.1.2 The content (mass fraction) of anhydrous calcium sulphoaluminate in ordinary sulphoaluminate cement clinker shall be not less than 50 %, and the content (mass fraction) of tetracalcium aluminoferrite shall be less than 15 %. The calculation of clinker mineral composition shall be carried out in accordance with Annex A.
5.1.3 In addition to meeting the requirements of 5.1.2, the silicon dioxide content (mass fraction) of clinker for self-stressing ordinary sulphoaluminate cement shall not exceed 10.5 %, and the mass fraction ratio of aluminium oxide to silicon dioxide shall not exceed 6.0.
5.1.4 The content (mass fraction) of anhydrous calcium sulphoaluminate in high-silicon sulphoaluminate cement clinker shall be not less than 20 % and not more than 40 %, and the content (mass fraction) of dicalcium silicate shall be not less than 37 %.
5.2 Gypsum
Gypsum shall comply with the provisions of Class A and Class G gypsum in GB/T 5483.
5.3 Limestone
The calcium oxide content (mass fraction) shall be not less than 46.0 %, and the aluminium oxide content (mass fraction) shall not exceed 2.0 %. The determination shall be carried out according to GB/T 5762.
5.4 Granulated blastfurnace slag/granulated blastfurnace slag powder
5.4.1 Granulated blastfurnace slag shall comply with the provisions of GB/T 203.
5.4.2 Granulated blastfurnace slag powder shall comply with the provisions of GB/T 18046.
5.5 Fly ash
Fly ash shall comply with the provisions of GB/T 1596.
6 Grades
6.1 Self-stressing ordinary sulphoaluminate cement is classified into two self-stress grades, 3.0 and 4.0, according to the 28 d self-stress value.
6.2 Low alkalinity ordinary sulphoaluminate cement is classified into three strength grades, 32.5, 42.5 and 52.5, according to the 7 d compressive strength.
6.3 Rapid ordinary sulphoaluminate cement is classified into four strength grades, 42.5, 52.5, 62.5 and 72.5, according to the 3 d compressive strength.
6.4 Low heat high-silicon sulphoaluminate cement and rapid and low shrinkage high-silicon sulphoaluminate cement are classified into two strength grades, 42.5 and 52.5, according to the 28 d compressive strength.
7 Technical Requirements
7.1 Strength of sulphoaluminate cement
7.1.1 Self-stressing ordinary sulphoaluminate cement
The 7 d compressive strength shall be not less than 32.5 MPa, and the 28 d compressive strength shall be not less than 42.5 MPa.
7.1.2 Low alkalinity ordinary sulphoaluminate cement
The strength of low alkalinity ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 1.
7.1.3 Rapid ordinary sulphoaluminate cement
The strength of rapid ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 2.
7.1.4 Low heat high-silicon sulphoaluminate cement
The strength of low heat high-silicon sulphoaluminate cement at each age shall comply with the requirements of Table 3.
7.1.5 Rapid and low shrinkage high-silicon sulphoaluminate cement
The strength of rapid and low shrinkage high-silicon sulphoaluminate cement at each age shall comply with the requirements of Table 4.
7.2 Self-stress value of self-stressing ordinary sulphoaluminate cement
The self-stress value of self-stressing ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 5.
7.3 Other properties of sulphoaluminate cement other than strength and self-stress value
Other properties of sulphoaluminate cement other than strength and self-stress value shall comply with the requirements of Table 6.
8 Test Methods
8.1 Aluminium oxide, iron oxide, silicon dioxide, chloride ion, potassium oxide and sodium oxide shall be determined according to GB/T 205.
8.2 Strength
8.2.1 The strength test for self-stressing ordinary sulphoaluminate cement shall be carried out according to JC/T 453.
8.2.2 The strength test for low alkalinity ordinary sulphoaluminate cement, rapid ordinary sulphoaluminate cement, low heat high-silicon sulphoaluminate cement and rapid and low shrinkage high-silicon sulphoaluminate cement shall be carried out according to GB/T 17671, where the water-cement ratio, charging sequence, specimen moulding, specimen demoulding and strength testing ages shall be carried out according to the following provisions.
GB/T 20472-2006 Sulphoaluminate cement English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 20472-2026
Sulphoaluminate cement
硫铝酸盐水泥
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Designation
5 Constituent Materials
6 Grades
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Packaging, Marking, Transport and Storage
Sulphoaluminate cement
1 Scope
This document specifies the classification and designation, constituent materials, grades, technical requirements, inspection rules, packaging, marking, transport and storage for sulphoaluminate cement, and describes the corresponding test methods.
This document is applicable to sulphoaluminate cement.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 203, Granulated blastfurnace slag for use in cement
GB/T 205, Methods for chemical analysis of aluminate cement
GB/T 1346, Test methods for water requirement of normal consistency, setting time and soundness of cement
GB/T 1596, Fly ash for use in cement and concrete
GB/T 2419, Test method for fluidity of cement mortar
GB/T 5483, Natural gypsum
GB/T 5762, Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry
GB 6566, Limits of radionuclides in building materials
GB/T 8074, Testing method for specific surface of cement — Blaine method
GB/T 9774, Cement packing bags
GB/T 12573, Method for sampling cement
GB/T 12959, Test methods for heat of hydration of cement
GB/T 17671, Test method of cement mortar strength (ISO method)
GB/T 18046, Granulated blast furnace slag powder for use in cement, mortar and concrete
JC/T 313, Test method for expansion ratio of expansive cement
JC/T 453, Test methods for physical properties of self-stressing cement
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
self-stressing ordinary sulphoaluminate cement
hydraulic cementitious material with expansive properties, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum
3.2
rapid ordinary sulphoaluminate cement
hydraulic cementitious material with high early strength, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum, a small amount of limestone, and/or a small amount of slag (powder) and fly ash
3.3
low alkalinity ordinary sulphoaluminate cement
hydraulic cementitious material with low alkalinity, made by intergrinding ordinary sulphoaluminate cement clinker with an appropriate amount of gypsum and a relatively large amount of limestone
3.4
low heat high-silicon sulphoaluminate cement
hydraulic cementitious material with low heat of hydration, made by intergrinding high-silicon sulphoaluminate cement clinker with an appropriate amount of gypsum, limestone, slag (powder) and/or fly ash
3.5
rapid and low shrinkage high-silicon sulphoaluminate cement
hydraulic cementitious material with rapid setting, rapid early hardening and low shrinkage properties, made by intergrinding high-silicon sulphoaluminate cement clinker with an appropriate amount of gypsum, slag (powder) and/or fly ash
4 Classification and Designation
4.1 Sulphoaluminate cement is classified according to the mineral composition of the clinker used into ordinary sulphoaluminate cement and high-silicon sulphoaluminate cement.
4.2 Ordinary sulphoaluminate cement is classified by performance into self-stressing ordinary sulphoaluminate cement (designated S·OSAC), low alkalinity ordinary sulphoaluminate cement (designated L·OSAC) and rapid ordinary sulphoaluminate cement (designated R·OSAC).
4.3 High-silicon sulphoaluminate cement is classified by performance into low heat high-silicon sulphoaluminate cement (designated LH·HSAC) and rapid and low shrinkage high-silicon sulphoaluminate cement (designated LS·HSAC).
5 Constituent Materials
5.1 Sulphoaluminate cement clinker
5.1.1 Sulphoaluminate cement clinker is classified into ordinary sulphoaluminate cement clinker and high-silicon sulphoaluminate cement clinker.
5.1.2 The content (mass fraction) of anhydrous calcium sulphoaluminate in ordinary sulphoaluminate cement clinker shall be not less than 50 %, and the content (mass fraction) of tetracalcium aluminoferrite shall be less than 15 %. The calculation of clinker mineral composition shall be carried out in accordance with Annex A.
5.1.3 In addition to meeting the requirements of 5.1.2, the silicon dioxide content (mass fraction) of clinker for self-stressing ordinary sulphoaluminate cement shall not exceed 10.5 %, and the mass fraction ratio of aluminium oxide to silicon dioxide shall not exceed 6.0.
5.1.4 The content (mass fraction) of anhydrous calcium sulphoaluminate in high-silicon sulphoaluminate cement clinker shall be not less than 20 % and not more than 40 %, and the content (mass fraction) of dicalcium silicate shall be not less than 37 %.
5.2 Gypsum
Gypsum shall comply with the provisions of Class A and Class G gypsum in GB/T 5483.
5.3 Limestone
The calcium oxide content (mass fraction) shall be not less than 46.0 %, and the aluminium oxide content (mass fraction) shall not exceed 2.0 %. The determination shall be carried out according to GB/T 5762.
5.4 Granulated blastfurnace slag/granulated blastfurnace slag powder
5.4.1 Granulated blastfurnace slag shall comply with the provisions of GB/T 203.
5.4.2 Granulated blastfurnace slag powder shall comply with the provisions of GB/T 18046.
5.5 Fly ash
Fly ash shall comply with the provisions of GB/T 1596.
6 Grades
6.1 Self-stressing ordinary sulphoaluminate cement is classified into two self-stress grades, 3.0 and 4.0, according to the 28 d self-stress value.
6.2 Low alkalinity ordinary sulphoaluminate cement is classified into three strength grades, 32.5, 42.5 and 52.5, according to the 7 d compressive strength.
6.3 Rapid ordinary sulphoaluminate cement is classified into four strength grades, 42.5, 52.5, 62.5 and 72.5, according to the 3 d compressive strength.
6.4 Low heat high-silicon sulphoaluminate cement and rapid and low shrinkage high-silicon sulphoaluminate cement are classified into two strength grades, 42.5 and 52.5, according to the 28 d compressive strength.
7 Technical Requirements
7.1 Strength of sulphoaluminate cement
7.1.1 Self-stressing ordinary sulphoaluminate cement
The 7 d compressive strength shall be not less than 32.5 MPa, and the 28 d compressive strength shall be not less than 42.5 MPa.
7.1.2 Low alkalinity ordinary sulphoaluminate cement
The strength of low alkalinity ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 1.
7.1.3 Rapid ordinary sulphoaluminate cement
The strength of rapid ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 2.
7.1.4 Low heat high-silicon sulphoaluminate cement
The strength of low heat high-silicon sulphoaluminate cement at each age shall comply with the requirements of Table 3.
7.1.5 Rapid and low shrinkage high-silicon sulphoaluminate cement
The strength of rapid and low shrinkage high-silicon sulphoaluminate cement at each age shall comply with the requirements of Table 4.
7.2 Self-stress value of self-stressing ordinary sulphoaluminate cement
The self-stress value of self-stressing ordinary sulphoaluminate cement at each age shall comply with the requirements of Table 5.
7.3 Other properties of sulphoaluminate cement other than strength and self-stress value
Other properties of sulphoaluminate cement other than strength and self-stress value shall comply with the requirements of Table 6.
8 Test Methods
8.1 Aluminium oxide, iron oxide, silicon dioxide, chloride ion, potassium oxide and sodium oxide shall be determined according to GB/T 205.
8.2 Strength
8.2.1 The strength test for self-stressing ordinary sulphoaluminate cement shall be carried out according to JC/T 453.
8.2.2 The strength test for low alkalinity ordinary sulphoaluminate cement, rapid ordinary sulphoaluminate cement, low heat high-silicon sulphoaluminate cement and rapid and low shrinkage high-silicon sulphoaluminate cement shall be carried out according to GB/T 17671, where the water-cement ratio, charging sequence, specimen moulding, specimen demoulding and strength testing ages shall be carried out according to the following provisions.
