Some standard content:
GB16776—1997
This standard specifies the most basic technical requirements for silicone structural sealants to meet the assembly of building glass systems. With the development of product performance research and test method research, new technical requirements and test methods will be added. This standard is not equivalent to ASTMC1184-95 "Silicone Structural Sealant" standard, including all physical and mechanical properties specified in the standard. The tensile adhesion technical indicators of this standard are higher than those of ASTMC1184. According to my country's national conditions, this standard adds an indicator of "applicability period" for two-component products. Appendix A of this standard "Compatibility test method" adopts ASTMC1087-87 "Test method for compatibility of sealants for glass structures with accessories" equivalently, and adds peeling test items. In terms of test methods, this standard adopts GB/T13477 "Test methods for building sealing materials" and GB/T531 "Test method for Shore A hardness of vulcanized rubber" of ISO standards in a non-equivalent manner. The water-ultraviolet radiation aging test method specified in this standard adopts the method specified in JC/T485, which is basically the same as the test principle and test conditions of ISO11431 "Building structure sealants--Determination of bonding/adhesion after artificial sunlight through glass". It is different from ASTM C 1184. To guide the correct use of the product, this standard specifies the compatibility test method (Appendix A) and the use process guide (Appendix B). This standard is published for the first time and will be implemented from August 1, 1997. Appendix A of this standard is the appendix to the standard, and Appendix B is the reminder appendix to the standard. This standard is under the jurisdiction of the National Technical Committee for Standardization of Lightweight and Decorative Building Materials. The responsible drafting units of this standard are: China Chemical Building Materials Company, Zhengzhou Zhongyuan Applied Technology Research Institute, and Henan Building Materials Research and Design Institute.
Participating drafting units of this standard: Guangzhou Baiyun Viscose Factory, Nanhai Jiamei Chemical Factory, Jiangmen Fine Chemical Factory, Shenzhen Jinyue Aluminum Products Co., Ltd., and Shenzhen Guanghua Insulating Glass Engineering Company. The main drafters of this standard are: Ma Qiyuan, Zhang Deheng, Li Guyun, Liu Ming, Ding Suhua, Wang Yaolin, and Geng Bin. 589
1 Scope
National Standard of the People's Republic of China
Structural silicone sealants for construction
buildingGB16776—1997
This standard specifies the classification, requirements, test methods, inspection rules, packaging, marking, transportation and storage of silicone structural sealants (referred to as structural sealants) for construction. This standard applies to structural sealants for bonding and sealing of building glass curtain walls and other structures. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T531—92 Test method for Shore A hardness of vulcanized rubber GB/T13477-92 Test method for building sealing materials GB/T14 682-93 Terminology of building sealing materials JC/T485-92 Elastic sealants for building windows JGJ102-96 Technical specifications for glass curtain wall engineering 3 Terminology
The terms used in this standard are defined in accordance with GB/T14682. 4 Classification
4.1 Type
The products are divided into single-component type and two-component type, and are marked with the number of components that make up the product. 4.2 Applicable substrate category
The products are divided into the following categories according to the applicable substrates, represented by codes: Category code
4.3 Product marking
Applicable substrate
Cement mortar, concrete
4.3.1 Marking method
The products are marked according to the base polymer, type, applicable substrate category, and standard number. 4.3.2 Marking example
For example, a two-component structural adhesive for gold, glass, and concrete is marked as: Approved by the State Administration of Technical Supervision on May 15, 1997 590
Implemented on August 1, 1997
5 Technical requirements
5.1 Appearance
GB16776-1997
GB 16776—1997
Standard code
Applicable substrate category
-Type
Silicone product series
5.1.1 The product should be a fine, uniform paste, without lumps, gels, crusts, and precipitates that are difficult to disperse quickly. 5.1.2 The two components of the two-component structural adhesive should have obvious differences in color. 5.2 Physical and mechanical properties
The physical and mechanical properties of the product shall comply with the requirements of Table 1 Table 1
Sag
Tensile adhesion
Heat aging
1) Only applicable to two-component products
6 Test methods
6.1 Basic test requirements
6.1.1 Standard test conditions
Vertical placement, mm
Horizontal placement
Extrudability
Applicable period\, min
Surface drying time, h
Shore hardness
Tensile adhesion strength
M Pa, not less than
standard conditions
after flooding
not greater than
not greater than
not less than,"
not greater than
water-ultraviolet light activity
bonding damaged area, %
heat loss, %
temperature (23±2)℃, relative humidity 45%55%. 6.1.2 Sample preparation
The sample is placed in the original packaging state under the standard conditions of 6.1.1 for 24h. No hand
No hand
Technical indicators
No deformation
GB 16776-1997
When preparing the sample of two-component structural adhesive, take at least 250g of component A and mix it with the curing agent (component B) according to the ratio provided by the manufacturer and stir for 5 minutes.
6.2 Appearance
Open the original packaging container for visual inspection.
6.3 Sagging
Perform according to Chapter 7 of GB/T13477. The mold is type b and the test temperature is (50±2)℃. 6.4 Extrusion
Perform according to Chapter 4 of GB/T13477. The glue gun is 177mL of ethylene carbonate, without installing the glue nozzle, and the glue extrusion pressure is 0.34MPa. Measure the time required to extrude all the samples at one time, in seconds. 6.5 Pot life
Mix the two-component structural adhesive according to the ratio specified by the manufacturer, and start timing from the time the two components are mixed. 20 min, measure the extrusion property according to 6.4, which should be no more than 10s.
6.6 Surface drying time
According to the provisions of Chapter 5 of GB/T13477.
6.7 Shore hardness
According to the provisions of GB/T531.
6.8 Tensile adhesion
6.8.1 Substrate
a) The specifications of the substrate shall comply with the provisions of Figure 6 in Chapter 13 of GB/T13477. b) Select the following substrates according to the applicable substrate category of the product: Category M - aluminum plate with anodized surface, with a thickness of not less than 3mm; Category C - cement mortar board, with a thickness of not less than 10 mm, Category G clean, uncoated float glass, with a thickness of not less than 5 mm, Note: The above substrates are only used for basic product performance testing and do not represent the properties of the substrates used in actual projects. The adhesion of the substrates used in actual projects shall be in accordance with Appendix A Inspection.
c) When the product manufacturer requires the use of primer, all test piece surfaces shall be primed as required. 6.8.2 Test pieces
a) Prepare test pieces in accordance with 9.2 of GB/T13477, with 5 pieces in a group. b) One side of the test piece substrate must be Class G. c) The prepared test pieces shall be cured under the following conditions: 1) The test pieces prepared with two-component structural adhesive shall be released under standard conditions for 14 days; 2) The test pieces prepared with one-component structural adhesive shall be released under standard conditions for 21 days. 3) During the curing period, the block shall be separated as soon as possible without damaging the structural adhesive test piece. 6.8.3 Tensile adhesion under standard conditions
Test according to 9.4, 9.5 and 9.6 of GB/T13477. 6.8.4 Tensile Adhesion at 90°C
Take a group of test pieces and place them in a (90±2)°C forced air drying oven for 1 hour, and then test them at this temperature according to 6.8.3. 6.8.5 Tensile Adhesion at 30°C
Take a group of test pieces and place them in a (-30±2)°C low temperature oven for 1 hour, and then test them at this temperature according to 6.8.3. 6.8.6 Tensile Adhesion after Flooding
Under standard conditions, immerse a group of test pieces in distilled water or deionized water for 7 days, and test them according to 6.8.3 within 10 minutes after taking them out.
6.8.7 Tensile adhesion after water-ultraviolet light durability test 592
GB16776--1997
Take a group of test pieces and test them continuously for 300 hours according to 5.12 of JC/T485. Then, test them according to 6.8.3. 6.9 Heat aging
6.9.1 Test equipment
a) Blast drying oven: temperature controlled at (90±2)℃, b) Balance: accuracy of 1 mg;
c) Aluminum plate: size 152mm×80mm×0.6mm~1.6mm, d) Metal mold frame: inner frame size 130mm×40mm×6.4mm; e) Scraper: about 150mm long.
6.9.2 Test steps
6.9.2.1 Take 3 clean aluminum plates and weigh them separately. 6.9.2.2 Place the metal mold frame on the aluminum plate, and scrape the structural adhesive on the aluminum plate inside the frame. After scraping it flat, remove the mold frame immediately, weigh them separately, and place them under standard conditions for 7 days.
6.9.2.3 Take two test pieces and put them in a 90℃ forced air drying oven for 21 days. The third test piece is placed under standard conditions for 21 days. 6.9.2.4 After the test piece is taken out of the drying oven, cool it for 1 hour under standard conditions and weigh it. 6.9.3 The mass loss is calculated according to formula (1). The test result is the arithmetic mean of the two test pieces, accurate to 0.1%: AW
Where: AW-
—mass loss, %,
mass of aluminum plate 8,
mass of aluminum plate and structural adhesive, denominator
m3-—mass of aluminum plate and structural adhesive after the test, g. (m2 - ms)
(m2-m)
× 100
6.9.4 Cracking and powdering inspection: Compare with the third test piece and check the surface changes of the test piece. 7 Inspection rules
7.1 Factory inspection
The factory inspection items are:
a) Appearance;
b) Sagging;
c) Extrusion;
d) Applicable period;
e) Surface drying time,
f) Shore hardness,
g) Tensile adhesion under standard conditions.
7.2 Type inspection
The type inspection items are all the items in Chapter 5 of this standard. Type inspection should be conducted in any of the following situations: a) new products or old products are tested for trial production; b) product formula, raw materials, and process have changed significantly; c) normal production, once a year; d) when production is resumed after a long period of suspension; e) when the factory inspection results are significantly different from the last type inspection; f) when the national quality supervision agency proposes a type inspection requirement. 7.3 Batch and sampling rules
7.3.1 In continuous production, 3 tons is a batch, and less than 3 tons is counted as 3 tons. In intermittent production, each batch of materials is a batch. (1)
GB16776-1997
7.3.2 Random sampling. The sampling amount should meet the inspection requirement. After sampling from the original package of two-component structural adhesive, it should be sealed and packaged separately immediately. 7.4 Judgment rules
7.4.1 If the appearance quality does not meet the requirements of 5.1, the batch of products is judged to be unqualified. 7.4.2 Determination of single result
For the test items of surface drying time, sag, and tensile adhesion, if the test results of each test piece meet the requirements of Table 1, the item is determined to be qualified; if the test results of the remaining test items meet the requirements of Table 1, the item is determined to be qualified. 7.4.3 If two items in the factory inspection and type inspection do not meet the requirements of Table 1, the batch of products is determined to be unqualified. If one item does not meet the requirements, double sampling is allowed in the batch of products for single item re-inspection. If the item still does not meet the requirements, the batch of products is determined to be unqualified. 8 Packaging, marking, transportation and storage
8.1 Packaging
Single-component structural adhesives are packaged in sealed tubes, and the outer packaging is packaged in cartons or other materials. Each box of products should be accompanied by a product certificate. Two-component structural adhesives should be packed in two sealed barrels to form a group of unit packages. Each group of unit packages should be accompanied by a product certificate. Batch inspection should be accompanied by a factory inspection form.
8.2 Marking
The packaging container should be marked with:
a) manufacturer name and address;
b) product name,
c) product mark,
d) production date;
e) product batch number:
f) storage period,
g) net capacity of packaged product,
h) product color;
i) product instructions.
8.3 Storage and transportation
8.3.1 This product is a non-flammable and non-explosive material and can be transported as a general non-dangerous product. 8.3.2 During storage and transportation, it should be protected from sunlight and rain, and from impact and extrusion of product packaging. 8.3.3 The storage temperature should not be higher than 27℃, and the storage period should not be less than 6 months: or according to the manufacturer's guarantee period. 594
A1 Scope
GB 16776-1997
Appendix A
(Appendix to the standard)
Compatibility test method
A1.1 This appendix specifies the compatibility test method and peeling adhesion test method of structural adhesives with glass and aluminum profile structural system accessories (such as gaskets, fillers and adjustment pieces, etc.) after heat and ultraviolet aging. It is used to determine the bonding compatibility of structural adhesives with various materials and is suitable for the selection of glass structural systems in curtain wall projects. A1.2 This test method is an experimental screening process. The change in color and adhesion after the test is a key to determine the compatibility of materials. Practice has shown that the substrates and accessories that lose adhesion and fade in the test will also occur in actual use. A2 Test principle
A2.1 Use structural adhesives to bond actual engineering substrates, measure peeling adhesion, and determine the compatibility of structural adhesives with substrates. A2.2 Use structural adhesive to bond various accessories of glass structure system. After heat and ultraviolet aging treatment, examine the color change of the sample, check the adhesion with glass and accessories, and determine the compatibility of structural adhesive with accessories. A3 The compatibility determination of substrate and structural adhesive for actual engineering is tested according to the method specified in Chapter 12 of GB/T13477 to determine the peeling adhesion. A4 Compatibility determination of accessories and structural adhesive
A4.1 Test instruments and materials
A4.1.1 Test instruments
a) Ultraviolet lamp, in accordance with the requirements of 5.12.1 of JC/T485, b) Ultraviolet intensity meter, with a range of 1000~4000μW/cm; c) Thermometer, with a range of 0~100℃.
A4.1.2 Test materials
a) Glass plate, clean float glass, size 76mm×50mm×6mm, 12 pieces should be prepared; b) Anti-adhesive tape, one strip for each glass plate, size 25mm×76mm; c) Cleaning agent, 50% isopropyl alcohol-distilled water solution is recommended; d) Test structural adhesive, structural adhesive used in actual projects; e) Reference sealant, translucent sealant with similar composition to the test structural adhesive, provided or recommended by the manufacturer supplying the test structural adhesive. A4.2 Preparation and preparation of test pieces
A4.2.1 Laboratory conditions
Should meet the requirements of 6.1.1, and the structural adhesive samples should be placed under standard conditions for at least 24 hours. A4.2.2 Preparation of test pieces
A4.2.2.1 Clean the glass and accessories. Clean with the cleaning agent specified in A4.1.2c, wipe off the moisture and let it air dry naturally. A4.2.2.2 As shown in Figure A1, stick the anti-adhesive tape on one end of the glass plate, covering a width of about 25 mm. 595
Verification specimen
Benchmark sealant
Figure A1 Specimen
GB 16776-1997
Test specimen
Test structural adhesive
Adhesive tape
Note: "X\'s size should ensure the light intensity and temperature Figure A2 Specimen placement status
A4.2.2.3 As shown in Figure A1, prepare 12 specimens, 6 of which are verification specimens and the other 6 plus accessories are test specimens. The accessories should be cut into strips with a size of 6. 5 mm × 51 mm × 6.5 mm, placed in the middle of the glass plate. Squeeze the reference sealant and test structural adhesive on both sides of the attachment to the top, and bond them tightly to the glass. The junction of the two adhesives is about 3mm higher than the attachment. A4.2.2.4 Prepare the test specimens according to 6.8.2c. A4.3 Test procedure
A4.3.1 Placement of test specimens
After the test specimens are numbered, place them under the conditions of 6.1.1 for 24 hours. Take three test specimens and three verification specimens to form a group of specimens. Place the two groups of specimens under ultraviolet light, with the sealing seam of one group of specimens facing up and the glass side of the other group of specimens facing up (the sealing seam is at the bottom), see Figure A2. A4.3.2 Lighting test
Start the ultraviolet lamp to continuously irradiate the sample for 21 days. Use an ultraviolet intensity meter and a thermometer to measure the surface of the sample. The ultraviolet radiation intensity is 2000-3000μW/cm2 and the temperature is (50±2)℃. The ultraviolet intensity should be measured once a week. A4.3.3 Observe color changes and measure adhesion strength A4.3.3.1 After the light exposure, take out the specimen and cool it for 4 hours. A4.3.3.2 Carefully observe and record the color and other noteworthy changes of the structural adhesive on the test specimen and the verification specimen. A4.3.3.3 Measure the adhesion between the structural adhesive and the glass. Lift the structural adhesive from the anti-adhesive tape, pull it at 90° at the junction with the glass plate and peel it off from the glass, measure and calculate the percentage of adhesion failure (A1.): AL 100 - CF
-the percentage of adhesion failure in the damaged area, %, where: AL-
CF - the percentage of internal sudden failure in the damaged area, %. (A1)
A4.3.3:4 Measure the adhesion between the structural adhesive and the accessories. Pull the structural adhesive from the joint with the accessory at 90° and peel it off the accessory, measure and calculate the percentage of adhesion failure between the structural adhesive and the accessory. A4.4 Test report
Record and report the test results in the following table format:596
Test start time
Test completion time
Test material marking:
Test structural adhesive:
Benchmark sealant:
Accessories:
Specimen number
Color and appearance change
Glass adhesion failure percentage, %
Accessory adhesion failure percentage, %
B range
Benchmark sealant
Test structural adhesive
Benchmark sealant
Test structural adhesive
Benchmark sealant
Test structural adhesive
GB16776-1997
Compatibility test report
Test standard
Verification specimen
Sealing seam upward
Sealing seam downward
Appendix B
(Suggestive Appendix)
Registration number
Tester
Test specimen
Sealing seam upward
Process guide for structural adhesive bonding of assembled glazing structural units Sealing seam downward
This appendix specifies the process and process quality control test method for structural adhesive bonding of assembled glazing structural units. It is applicable to the assembly construction and quality control of structural adhesive bonding assembled glazing structural units, and can also be used for the production of insulating glass structures. B2 Process for structural adhesive bonding assembled glazing structural units B2.1 Material requirements for combined assembled structural units B2.1.1 Structural adhesive
Should meet the requirements of this standard.
B2.1.2 Primer material
Should meet the supplier's requirements.
B2.1.3 Base material
Glass, aluminum profiles and other base materials for structural assembly shall be bonded. The residual adhesion shall be determined according to A3. B2.1.4 Gasket material
Should be compatible with the structural adhesive according to the test in Appendix A.
Note: The compatibility test specified in Appendix A shall be carried out by the structural adhesive manufacturer. B2.1.5 Cleaning solvent
Reagent grade butanone and isopropyl alcohol are recommended. Xylene can also be used. B2.1.6 Rag
White clean, soft, singed cotton cloth. 597
B2.1.7 Isolation tape
GB 16776--1997
It is recommended to use paper-based pressure-sensitive tape, which can be easily torn off and leave no trace after pasting. B2.2 Construction conditions
B2.2.1 Construction environment conditions
a) The ambient temperature is (5~30)℃, and the relative humidity of the air is 35%~～75%. b) The glue injection construction site should be clean, flat, dust-free, and well ventilated. B2.2.2 Construction machinery and tools
a) Single-component structural adhesive extrusion and injection machinery:
Manual glue extrusion gun or pneumatic glue injection gun (equipped with an air compressor with an air pressure of 0.1~0.6MPa). b) Special glue mixing and injection machine for two-component structural adhesive. c) Scraper, cutting knife, and glue injection work platform for glue injection shaping and modification. B2.3 Construction procedures and process quality control B2.3.1 Construction procedures
Carry out according to JGJ102.
B2.3.2 When mixing and injecting two-component structural adhesive, the uniformity of the mixed glue should be checked according to B3.3 first, and the structural adhesive can be applied only after it passes the test. B2.3.3 When applying the structural adhesive, the batch peeling adhesion test shall be carried out according to B3.1. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the units manufactured in the same batch shall be stopped from leaving the factory. B2.3.4 The finished glass units with sealed bonding shall be tested for adhesive peeling according to B3.2. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the technical quality department shall decide to increase the sampling test and make a handling decision for the glass units in the same batch. B2.4 The quality of the bonding and sealing assembly of glass structural units shall be carried out in accordance with the provisions of JGJ102.
B3 Process Quality Control Inspection Method
B3.1 Batch Peeling Adhesion Test
B3.1.1 Take glass and aluminum profiles of the same mass as the glass structural units, and clean and apply structural adhesive according to the construction procedure of B2.3 at the same time as the units.
B3.1.2 The injected structural adhesive is placed under the conditions of B2.2.1a), with a single component placement time of 7 days and a two-component placement time of 3 days. B3.1.3 According to Figure B1, peel off the structural adhesive from one end of the adhesive strip in a direction perpendicular to or greater than 90°, check whether the structural adhesive has bonding debonding a or cohesive failure b, and record the percentage of cohesive failure. During the measurement, if the structural adhesive breaks, it indicates that the bonding is good (the bonding strength is greater than the cohesive strength). If the structural adhesive breaks at the pores or defects in the adhesive, it indicates that there is a problem with the construction operation technology. b Sudden internal failure
Bonding debonding
Figure B1 Schematic diagram of the test of adhesive peeling in batches B3.2 Test of adhesive peeling of finished glass structural unit components B3.2.1 One unit should be randomly selected from every 100 units. The adhesive on the unit to be tested should be initially cured. When using two-component 598
GB16776--1997
structural adhesive, it should be cured for 7 days, and single-component structural adhesive should be cured for 14 days. B3.2.2 Cut the structural adhesive between the assembly frame and the glass to separate the glass from the aluminum frame, then cut the structural adhesive with a knife and cut a strip of adhesive about 50 mm long horizontally along the substrate.
B3.2.3 As shown in Figure B2, hold the structural adhesive strip tightly with your hand and peel it in a direction greater than 90°, check whether the structural adhesive has internal damage b or debonding a phenomenon, and record the percentage of cohesive damage. B3.3 Determination of mixed glue uniformity
B3.3. 1 Squeeze the glue squeezed out by the glue mixing and injection machine into the middle of a paper (equivalent to A4 copy paper), fold the paper and flatten the glue. Figure B2 Schematic diagram of single element glue cutting and peeling adhesion determination B3.3.2 Open the paper to check the structural adhesive. The uniformly mixed structural adhesive should have no different color stripes. If white stripes appear on the glue, it indicates that the glue is not mixed uniformly.4 Test report
The test results shall be recorded and reported in the following table format:596
Test start time
Test completion time
Test material mark:
Test structural adhesive:
Benchmark sealant:
Accessories:
Specimen number
Color and appearance change
Glass bonding failure percentage, %
Accessory bonding failure percentage, %
B range
Benchmark sealant
Test structural adhesive
Benchmark sealant
Test structural adhesive|| tt||Benchmark sealant
Test structural adhesive
GB16776-1997
Compatibility test report
Test standard
Verification specimen
Sealing seam upward
Sealing seam downward
Appendix B
(Suggestive appendix)
Registration number
Tester
Test specimen
Sealing seam upward
Process guide for structural adhesive bonding of assembled glazing structural units Sealing seam downward
This appendix specifies the process and process quality control test method for structural adhesive bonding of assembled glazing structural units. It is applicable to the assembly construction and quality control of structural adhesive bonding assembled glazing structural units, and can also be used for the production of insulating glass structures. B2 Process for structural adhesive bonding assembled glazing structural units B2.1 Material requirements for assembled structural units B2.1.1 Structural adhesive
Should meet the requirements of this standard.
B2.1.2 Primer material
Should meet the supplier's requirements.
B2.1.3 Base material
Glass, aluminum profiles and other base materials for structural assembly shall be bonded. The residual adhesion shall be determined according to A3. B2.1.4 Gasket material
Should be compatible with the structural adhesive according to the test in Appendix A.
Note: The compatibility test specified in Appendix A shall be carried out by the structural adhesive manufacturer. B2.1.5 Cleaning solvent
Reagent grade butanone and isopropyl alcohol are recommended. Xylene can also be used. B2.1.6 Rag
White clean, soft, singed cotton cloth. 597
B2.1.7 Isolation tape
GB 16776--1997
It is recommended to use paper-based pressure-sensitive tape, which can be easily torn off and leave no trace after pasting. B2.2 Construction conditions
B2.2.1 Construction environment conditions
a) The ambient temperature is (5~30)℃, and the relative humidity of the air is 35%~～75%. b) The glue injection construction site should be clean, flat, dust-free, and well ventilated. B2.2.2 Construction machinery and tools
a) Single-component structural adhesive extrusion and injection machinery:
Manual glue extrusion gun or pneumatic glue injection gun (equipped with an air compressor with an air pressure of 0.1~0.6MPa). b) Special glue mixing and injection machine for two-component structural adhesive. c) Scraper, cutting knife, and glue injection work platform for glue injection shaping and modification. B2.3 Construction procedures and process quality control B2.3.1 Construction procedures
Carry out according to JGJ102.
B2.3.2 When mixing and injecting two-component structural adhesive, the uniformity of the mixed glue should be checked according to B3.3 first, and the structural adhesive can be applied only after it passes the test. B2.3.3 When applying the structural adhesive, the batch peeling adhesion test shall be carried out according to B3.1. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the units manufactured in the same batch shall be stopped from leaving the factory. B2.3.4 The finished glass units with sealed bonding shall be tested for adhesive peeling according to B3.2. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the technical quality department shall decide to increase the sampling test and make a handling decision for the glass units in the same batch. B2.4 The quality of the bonding and sealing assembly of glass structural units shall be carried out in accordance with the provisions of JGJ102.
B3 Process Quality Control Inspection Method
B3.1 Batch Peeling Adhesion Test
B3.1.1 Take glass and aluminum profiles of the same mass as the glass structural units, and clean and apply structural adhesive according to the construction procedure of B2.3 at the same time as the units.
B3.1.2 The injected structural adhesive is placed under the conditions of B2.2.1a), with a single component placement time of 7 days and a two-component placement time of 3 days. B3.1.3 According to Figure B1, peel off the structural adhesive from one end of the adhesive strip in a direction perpendicular to or greater than 90°, check whether the structural adhesive has bonding debonding a or cohesive failure b, and record the percentage of cohesive failure. During the measurement, if the structural adhesive breaks, it indicates that the bonding is good (the bonding strength is greater than the cohesive strength). If the structural adhesive breaks at the pores or defects in the adhesive, it indicates that there is a problem with the construction operation technology. b Sudden internal failure
Bonding debonding
Figure B1 Schematic diagram of the test of adhesive peeling in batches B3.2 Test of adhesive peeling of finished glass structural unit components B3.2.1 One unit should be randomly selected from every 100 units. The adhesive on the unit to be tested should be initially cured. When using two-component 598
GB16776--1997
structural adhesive, it should be cured for 7 days, and single-component structural adhesive should be cured for 14 days. B3.2.2 Cut the structural adhesive between the assembly frame and the glass to separate the glass from the aluminum frame, then cut the structural adhesive with a knife and cut a strip of adhesive about 50 mm long horizontally along the substrate.
B3.2.3 As shown in Figure B2, hold the structural adhesive strip tightly with your hand and peel it in a direction greater than 90°, check whether the structural adhesive has internal damage b or debonding a phenomenon, and record the percentage of cohesive damage. B3.3 Determination of mixed glue uniformity
B3.3. 1 Squeeze the glue squeezed out by the glue mixing and injection machine into the middle of a paper (equivalent to A4 copy paper), fold the paper and flatten the glue. Figure B2 Schematic diagram of single element glue cutting and peeling adhesion determination B3.3.2 Open the paper to check the structural adhesive. The uniformly mixed structural adhesive should have no different color stripes. If white stripes appear on the glue, it indicates that the glue is not mixed uniformly.4 Test report
The test results shall be recorded and reported in the following table format:596
Test start time
Test completion time
Test material mark:
Test structural adhesive:
Benchmark sealant:
Accessories:
Specimen number
Color and appearance change
Glass bonding failure percentage, %
Accessory bonding failure percentage, %
B range
Benchmark sealant
Test structural adhesive
Benchmark sealant
Test structural adhesive|| tt||Benchmark sealant
Test structural adhesive
GB16776-1997
Compatibility test report
Test standard
Verification specimen
Sealing seam upward
Sealing seam downwardbZxz.net
Appendix B
(Suggestive appendix)
Registration number
Tester
Test specimen
Sealing seam upward
Process guide for structural adhesive bonding of assembled glazing structural units Sealing seam downward
This appendix specifies the process and process quality control test method for structural adhesive bonding of assembled glazing structural units. It is applicable to the assembly construction and quality control of structural adhesive bonding assembled glazing structural units, and can also be used for the production of insulating glass structures. B2 Process for structural adhesive bonding assembled glazing structural units B2.1 Material requirements for assembled structural units B2.1.1 Structural adhesive
Should meet the requirements of this standard.
B2.1.2 Primer material
Should meet the supplier's requirements.
B2.1.3 Base material
Glass, aluminum profiles and other base materials for structural assembly shall be bonded. The residual adhesion shall be determined according to A3. B2.1.4 Gasket material
Should be compatible with the structural adhesive according to the test in Appendix A.
Note: The compatibility test specified in Appendix A shall be carried out by the structural adhesive manufacturer. B2.1.5 Cleaning solvent
Reagent grade butanone and isopropyl alcohol are recommended. Xylene can also be used. B2.1.6 Rag
White clean, soft, singed cotton cloth. 597
B2.1.7 Isolation tape
GB 16776--1997
It is recommended to use paper-based pressure-sensitive tape, which can be easily torn off and leave no trace after pasting. B2.2 Construction conditions
B2.2.1 Construction environment conditions
a) The ambient temperature is (5~30)℃, and the relative humidity of the air is 35%~～75%. b) The glue injection construction site should be clean, flat, dust-free, and well ventilated. B2.2.2 Construction machinery and tools
a) Single-component structural adhesive extrusion and injection machinery:
Manual glue extrusion gun or pneumatic glue injection gun (equipped with an air compressor with an air pressure of 0.1~0.6MPa). b) Special glue mixing and injection machine for two-component structural adhesive. c) Scraper, cutting knife, and glue injection work platform for glue injection shaping and modification. B2.3 Construction procedures and process quality control B2.3.1 Construction procedures
Carry out according to JGJ102.
B2.3.2 When mixing and injecting two-component structural adhesive, the uniformity of the mixed glue should be checked according to B3.3 first, and the structural adhesive can be applied only after it passes the test. B2.3.3 When applying the structural adhesive, the batch peeling adhesion test shall be carried out according to B3.1. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the units manufactured in the same batch shall be stopped from leaving the factory. B2.3.4 The finished glass units with sealed bonding shall be tested for adhesive peeling according to B3.2. Once the test debonding occurs, the construction operation technology shall be traced back and checked, and the technical quality department shall decide to increase the sampling test and make a handling decision for the glass units in the same batch. B2.4 The quality of the bonding and sealing assembly of glass structural units shall be carried out in accordance with the provisions of JGJ102.
B3 Process Quality Control Inspection Method
B3.1 Batch Peeling Adhesion Test
B3.1.1 Take glass and aluminum profiles of the same mass as the glass structural units, and clean and apply structural adhesive according to the construction procedure of B2.3 at the same time as the units.
B3.1.2 The injected structural adhesive is placed under the conditions of B2.2.1a), with a single component placement time of 7 days and a two-component placement time of 3 days. B3.1.3 According to Figure B1, peel off the structural adhesive from one end of the adhesive strip in a direction perpendicular to or greater than 90°, check whether the structural adhesive has bonding debonding a or cohesive failure b, and record the percentage of cohesive failure. During the measurement, if the structural adhesive breaks, it indicates that the bonding is good (the bonding strength is greater than the cohesive strength). If the structural adhesive breaks at the pores or defects in the adhesive, it indicates that there is a problem with the construction operation technology. b Sudden internal failure
Bonding debonding
Figure B1 Schematic diagram of the test of adhesive peeling in batches B3.2 Test of adhesive peeling of finished glass structural unit components B3.2.1 One unit should be randomly selected from every 100 units. The adhesive on the unit to be tested should be initially cured. When using two-component 598
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structural adhesive, it should be cured for 7 days, and single-component structural adhesive should be cured for 14 days. B3.2.2 Cut the structural adhesive between the assembly frame and the glass to separate the glass from the aluminum frame, then cut the structural adhesive with a knife and cut a strip of adhesive about 50 mm long horizontally along the substrate.
B3.2.3 As shown in Figure B2, hold the structural adhesive strip tightly with your hand and peel it in a direction greater than 90°, check whether the structural adhesive has internal damage b or debonding a phenomenon, and record the percentage of cohesive damage. B3.3 Determination of mixed glue uniformity
B3.3. 1 Squeeze the glue squeezed out by the glue mixing and injection machine into the middle of a paper (equivalent to A4 copy paper), fold the paper and flatten the glue. Figure B2 Schematic diagram of single element glue cutting and peeling adhesion determination B3.3.2 Open the paper to check the structural adhesive. The uniformly mixed structural adhesive should have no different color stripes. If white stripes appear on the glue, it indicates that the glue is not mixed uniformly.2 Carry out adhesive test by cutting and peeling. Once the test debonds, the construction operation technology should be traced back and checked. The technical quality department shall decide to add sampling test and make treatment decisions for the glass units in the same batch. B2.4 The quality of bonding and sealing assembly of glass structural units shall be carried out in accordance with JGJ102.
B3 Process quality control test method
B3.1 Batch peeling adhesive test
B3.1.1 Take glass and aluminum profiles of the same mass as the glass structural units, and clean and apply structural adhesive according to the construction procedure of B2.3 at the same time as the units.
B3.1.2 The injected structural adhesive is placed under the conditions of B2.2.1a), and the single component is placed for 7 days and the double component is placed for 3 days. B3.1.3 According to Figure B1, peel off the structural adhesive from one end of the adhesive strip in a vertical or greater than 90° direction, check whether the structural adhesive has bonding debonding a or cohesive failure b phenomenon, and record the percentage of cohesive failure. During the test, if the structural adhesive breaks, it indicates that the bonding is good (the bonding strength is greater than the cohesive strength). If the adhesive breaks at the pores or defects in the adhesive, it indicates that there is a problem with the construction operation technology. b Sudden internal failure
Adhesion debonding
Figure B1 Schematic diagram of the test of peeling adhesion of batch B3.2 Test of the peeling adhesion of finished glass structural unit B3.2.1 One unit should be randomly selected from every 100 units. The adhesive on the unit to be tested should be initially cured. The two-component 598
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structural adhesive should be cured for 7 days, and the single-component structural adhesive should be cured for 14 days. B3.2.2 Cut the structural adhesive between the assembly frame and the glass to separate the glass from the aluminum frame, then cut the structural adhesive with a knife and cut a strip of adhesive about 50 mm long horizontally along the substrate.
B3.2.3 As shown in Figure B2, hold the structural adhesive strip tightly with your hands and peel it off in a direction greater than 90°, check whether the structural adhesive has internal failure b or debonding a phenomenon, and record the percentage of cohesive failure. B3.3 Determination of mixed glue uniformity
B3.3. 1 Inject the glue squeezed out by the glue mixing and injection machine into the middle of a paper (equivalent in size to A4 copy paper), and fold the paper to flatten the glue. Figure B2 Schematic diagram of single element glue cutting and peeling adhesion determination B3.3.2 Open the paper to check the structural adhesive. The uniformly mixed structural adhesive should have no different color stripes. If white stripes appear on the glue, it indicates that the glue is not mixed evenly.2 Carry out adhesive test by cutting and peeling. Once the test debonds, the construction operation technology should be traced back and checked. The technical quality department shall decide to add sampling test and make treatment decisions for the glass units in the same batch. B2.4 The quality of bonding and sealing assembly of glass structural units shall be carried out in accordance with JGJ102.
B3 Process quality control test method
B3.1 Batch peeling adhesive test
B3.1.1 Take glass and aluminum profiles of the same mass as the glass structural units, and clean and apply structural adhesive according to the construction procedure of B2.3 at the same time as the units.
B3.1.2 The injected structural adhesive is placed under the conditions of B2.2.1a), and the single component is placed for 7 days and the double component is placed for 3 days. B3.1.3 According to Figure B1, peel off the structural adhesive from one end of the adhesive strip in a vertical or greater than 90° direction, check whether the structural adhesive has bonding debonding a or cohesive failure b phenomenon, and record the percentage of cohesive failure. During the test, if the structural adhesive breaks, it indicates that the bonding is good (the bonding strength is greater than the cohesive strength). If the adhesive breaks at the pores or defects in the adhesive, it indicates that there is a problem with the construction operation technology. b Sudden internal failure
Adhesion debonding
Figure B1 Schematic diagram of the test of peeling adhesion of batch B3.2 Test of the peeling adhesion of finished glass structural unit B3.2.1 One unit should be randomly selected from every 100 units. The adhesive on the unit to be tested should be initially cured. The two-component 598
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structural adhesive should be cured for 7 days, and the single-component structural adhesive should be cured for 14 days. B3.2.2 Cut the structural adhesive between the assembly frame and the glass to separate the glass from the aluminum frame, then cut the structural adhesive with a knife and cut a strip of adhesive about 50 mm long horizontally along the substrate.
B3.2.3 As shown in Figure B2, hold the structural adhesive strip tightly with your hands and peel it off in a direction greater than 90°, check whether the structural adhesive has internal failure b or debonding a phenomenon, and record the percentage of cohesive failure. B3.3 Determination of mixed glue uniformity
B3.3. 1 Inject the glue squeezed out by the glue mixing and injection machine into the middle of a paper (equivalent in size to A4 copy paper), and fold the paper to flatten the glue. Figure B2 Schematic diagram of single element glue cutting and peeling adhesion determination B3.3.2 Open the paper to check the structural adhesive. The uniformly mixed structural adhesive should have no different color stripes. If white stripes appear on the glue, it indicates that the glue is not mixed evenly.
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