Structural silicon sealants for building curtain wall
1 Scope
This standard specifies the classification and labeling, requirements, test methods, inspection rules, marking, packaging, transportation and storage of structural silicon sealants for building curtain wall (hereinafter referred to as structural silicon sealants).
This standard is applicable to structural silicon sealants for building curtain wall with a design service life of not less than 25 years.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
GB/T 531.1 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness)
GB/T 9789 Metallic and other non-organic coatings - Sulfur dioxide test with general condensation of moisture
GB 9985 Detergents for hand dishwashing
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 13477.1 Test method for building sealants - Part 1: Specifications for test substrates
GB/T 13477.3 Test method for building sealants - Part 3: Determination of extrudability of sealants using standardized apparatus
GB/T 13477.5-2002 Test method for building sealants - Part 5: Determination for track-free time
GB/T 13477.6 Test methods for building sealants - Part 6: Determination of flow
GB/T 13477.8-2002 Test method for building sealants - Part 8: Determination of tensile properties
GB/T 13477.17 Test method for building sealants - Part 17: Determination of elastic recovery
GB/T 13477.19 Test method for building sealants - Part 19: Determination of change in mass and volume
GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources
GB/T 16422.3 Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps
GB 16776-2005 Structural silicon sealants for building
JG/T 471 Elastic sealants for insulating glass units of windows and curtain walls in building
3 Classification and labeling
3.1 Classification
Products are classified into one-component type (1) and two-component type (2) by composition.
Products are classified into aluminum (AL), glass (G) and miscellaneous metals (M) by applicable substrates.
3.2 Labeling
Products are labeled in the following order: name, classification, and number of this standard.
Example: the two-component structural silicon sealant for building curtain wall of aluminum and glass substrate is labeled as:
Structural silicon sealant 2ALG JG/T 475-2015
4 Requirements
4.1 General requirements
The design service life of structural silicon sealant shall not be less than 25 years, and the use conditions and maintained properties shall be clearly defined. See Table 1 for the general requirements of products.
Table 1 General requirements
S.N. Item Requirements
1 Stiffness Initial stiffness K12.5 To be reported
Stiffness ratio after water-ultraviolet irradiation Kc, 12.5/K12.5 0.5≤Kc, 12.5/K12.5≤1.10
2 Consistency evaluation Thermogravimetric analysis To be reported
Infrared spectroscopy To be reported
3 Tensile modulus The tensile adhesion strength at 23℃ with elongation of 5%, 10%, 15%, 20% and 25% shall be reported
4 Elastic modulus at 12.5% To be reported
The stiffness and elastic modulus test of structural silicon sealants shall meet the requirements of Annex A.
The structural silicon sealants may be tested according to the requirements of Annex D, GB 16776-2005 during construction.
4.2 Appearance
4.2.1 The structural silicon sealants shall be fine and uniform paste or viscous body free of bubbles, caking, crusting or gelatinization, and shall be free of non-dispersible precipitates after stirring.
4.2.2 The colors of various components of the two-component structural silicon sealants shall be obviously different. The product color may also be agreed by the supplier and the purchaser, and shall not be obviously different from that of the sample agreed by them.
4.3 Physical and mechanical properties
The physical and mechanical properties of products shall meet those specified in Table 2.
Table 2 Physical and mechanical properties
... ...
4.4 Compatibility
4.4.1 The compatibility between structural silicon sealants and accessories for structural assembly system shall meet the requirements of Annex A, GB 16776-2005.
4.4.2 The adhesion between structural silicon sealants and substrates used in practical works shall meet the requirements of Annex B, GB 16776-2005.
4.4.3 The compatibility between structural silicon sealants and the materials they are exposed to shall meet the requirements of Annex B.
5 Test methods
5.1 Basic requirements
5.1.1 Standard test conditions
Standard test conditions of the laboratory: temperature of (23±2)℃ and relative humidity of (50±5)%.
5.1.2 Preparation of adhesion specimens
5.1.2.1 Specimen preparation
Before specimen preparation, the structural silicon sealants used for test shall be placed for more than 24h under standard conditions. The test substrate shall be cleaned with cleaning agent. Two-component specimens shall be mixed according to the ratio required by the manufacturer.
Foreword i 1 Scope 2 Normative references 3 Classification and labeling 3.1 Classification 3.2 Labeling 4 Requirements 4.1 General requirements 4.2 Appearance 4.3 Physical and mechanical properties 4.4 Compatibility 5 Test methods 5.1 Basic requirements 5.2 Appearance 5.3 Slump 5.4 Track-free time 5.5 Extrudability 5.6 Application life 5.7 Shore hardness A 5.8 Bubble 5.9 Tensile properties 5.10 Shear properties 5.11 Tear strength 5.12 Fatigue cycle 5.13 Mass change - thermal weight loss 5.14 Retention rate of UV-resistant tensile strength 5.15 Alkane plasticizers 5.16 Elastic recovery 5.17 Creep resistance 5.18 Compatibility 6 Inspection rules 6.1 Inspection classification 6.2 Batching 6.3 Sampling 6.4 Judgment rules 7 Marking, packaging, transportation and storage 7.1 Marking 7.2 Packaging 7.3 Transportation 7.4 Storage Annex A (Normative) Elastic modulus test of structural silicone sealants Annex B (Normative) Compatibility with adjacent contact materials Annex C (Normative) Creep resistance
Structural silicon sealants for building curtain wall
1 Scope
This standard specifies the classification and labeling, requirements, test methods, inspection rules, marking, packaging, transportation and storage of structural silicon sealants for building curtain wall (hereinafter referred to as structural silicon sealants).
This standard is applicable to structural silicon sealants for building curtain wall with a design service life of not less than 25 years.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
GB/T 531.1 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness)
GB/T 9789 Metallic and other non-organic coatings - Sulfur dioxide test with general condensation of moisture
GB 9985 Detergents for hand dishwashing
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 13477.1 Test method for building sealants - Part 1: Specifications for test substrates
GB/T 13477.3 Test method for building sealants - Part 3: Determination of extrudability of sealants using standardized apparatus
GB/T 13477.5-2002 Test method for building sealants - Part 5: Determination for track-free time
GB/T 13477.6 Test methods for building sealants - Part 6: Determination of flow
GB/T 13477.8-2002 Test method for building sealants - Part 8: Determination of tensile properties
GB/T 13477.17 Test method for building sealants - Part 17: Determination of elastic recovery
GB/T 13477.19 Test method for building sealants - Part 19: Determination of change in mass and volume
GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources
GB/T 16422.3 Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps
GB 16776-2005 Structural silicon sealants for building
JG/T 471 Elastic sealants for insulating glass units of windows and curtain walls in building
3 Classification and labeling
3.1 Classification
Products are classified into one-component type (1) and two-component type (2) by composition.
Products are classified into aluminum (AL), glass (G) and miscellaneous metals (M) by applicable substrates.
3.2 Labeling
Products are labeled in the following order: name, classification, and number of this standard.
Example: the two-component structural silicon sealant for building curtain wall of aluminum and glass substrate is labeled as:
Structural silicon sealant 2ALG JG/T 475-2015
4 Requirements
4.1 General requirements
The design service life of structural silicon sealant shall not be less than 25 years, and the use conditions and maintained properties shall be clearly defined. See Table 1 for the general requirements of products.
Table 1 General requirements
S.N. Item Requirements
1 Stiffness Initial stiffness K12.5 To be reported
Stiffness ratio after water-ultraviolet irradiation Kc, 12.5/K12.5 0.5≤Kc, 12.5/K12.5≤1.10
2 Consistency evaluation Thermogravimetric analysis To be reported
Infrared spectroscopy To be reported
3 Tensile modulus The tensile adhesion strength at 23℃ with elongation of 5%, 10%, 15%, 20% and 25% shall be reported
4 Elastic modulus at 12.5% To be reported
The stiffness and elastic modulus test of structural silicon sealants shall meet the requirements of Annex A.
The structural silicon sealants may be tested according to the requirements of Annex D, GB 16776-2005 during construction.
4.2 Appearance
4.2.1 The structural silicon sealants shall be fine and uniform paste or viscous body free of bubbles, caking, crusting or gelatinization, and shall be free of non-dispersible precipitates after stirring.
4.2.2 The colors of various components of the two-component structural silicon sealants shall be obviously different. The product color may also be agreed by the supplier and the purchaser, and shall not be obviously different from that of the sample agreed by them.
4.3 Physical and mechanical properties
The physical and mechanical properties of products shall meet those specified in Table 2.
Table 2 Physical and mechanical properties
... ...
4.4 Compatibility
4.4.1 The compatibility between structural silicon sealants and accessories for structural assembly system shall meet the requirements of Annex A, GB 16776-2005.
4.4.2 The adhesion between structural silicon sealants and substrates used in practical works shall meet the requirements of Annex B, GB 16776-2005.
4.4.3 The compatibility between structural silicon sealants and the materials they are exposed to shall meet the requirements of Annex B.
5 Test methods
5.1 Basic requirements
5.1.1 Standard test conditions
Standard test conditions of the laboratory: temperature of (23±2)℃ and relative humidity of (50±5)%.
5.1.2 Preparation of adhesion specimens
5.1.2.1 Specimen preparation
Before specimen preparation, the structural silicon sealants used for test shall be placed for more than 24h under standard conditions. The test substrate shall be cleaned with cleaning agent. Two-component specimens shall be mixed according to the ratio required by the manufacturer.
Contents of JG/T 475-2015
Foreword i
1 Scope
2 Normative references
3 Classification and labeling
3.1 Classification
3.2 Labeling
4 Requirements
4.1 General requirements
4.2 Appearance
4.3 Physical and mechanical properties
4.4 Compatibility
5 Test methods
5.1 Basic requirements
5.2 Appearance
5.3 Slump
5.4 Track-free time
5.5 Extrudability
5.6 Application life
5.7 Shore hardness A
5.8 Bubble
5.9 Tensile properties
5.10 Shear properties
5.11 Tear strength
5.12 Fatigue cycle
5.13 Mass change - thermal weight loss
5.14 Retention rate of UV-resistant tensile strength
5.15 Alkane plasticizers
5.16 Elastic recovery
5.17 Creep resistance
5.18 Compatibility
6 Inspection rules
6.1 Inspection classification
6.2 Batching
6.3 Sampling
6.4 Judgment rules
7 Marking, packaging, transportation and storage
7.1 Marking
7.2 Packaging
7.3 Transportation
7.4 Storage
Annex A (Normative) Elastic modulus test of structural silicone sealants
Annex B (Normative) Compatibility with adjacent contact materials
Annex C (Normative) Creep resistance
