This standard specifies the rainwater leakage performance test method for building curtain walls. This standard applies to building glass curtain walls. The test object is limited to the curtain wall itself and does not involve the joints between the curtain wall and other structures. GB/T 15228-1994 Rainwater leakage performance test method for building curtain walls GB/T15228-1994 Standard download decompression password: www.bzxz.net

The main drafters of this standard are Tan Hengyu, Gao Xijiu and Liu Hao. V. Building decoration materials
This standard is entrusted to the Institute of Building Physics of China Academy of Building Research for interpretation. 31. "Test Method for Rainwater Penetration Performance of Building Curtain Wall" GB/T15228-941 Subject content and scope of application
This standard specifies the test method for rainwater penetration performance of building curtain wall. 433
This standard applies to building glass curtain wall. The test object is limited to the curtain wall itself, and does not involve the joints between the curtain wall and other structures.
2 Terms
2.1 Curtain walls
Refers to the enclosure components composed of metal, glass and sealing materials suspended on the load-bearing structure of the building. 2.2 Rainwater penetration refers to the performance of the curtain wall to pass rainwater under the simultaneous action of wind and rain. 2.3 Pressure difference refers to the difference in the absolute air pressure on the inner and outer surfaces of the curtain wall specimen. When the pressure on the outer surface is greater than the pressure on the inner surface, the pressure difference is positive; otherwise, it is negative. The unit of pressure difference is Pa (Pascal). 1Pa=1N/m2.2.4 Severe rainwater leakage Rainwater leakage Rainwater penetrates into the inner side of the curtain wall and soaks the parts that should not be wetted in the design. The sign of severe leakage is that the rainwater penetrates into the inner side of the curtain wall and continuously flows out of the test piece interface. 2.5 Pressure difference under rainwater leakage Pressure difference under rainwater leakage The curtain wall loses the ability to prevent rainwater leakage and has severe leakage. 2.6 Volume of water spray The amount of water used to test the continuous water curtain on the surface of the curtain wall test piece. Its value is 4L/m2·min. 3 Detection device
3.1 The detection device should have an opening that is large enough to install the test piece and has the ability to detect the rainwater leakage performance of the curtain wall. It consists of the parts shown in Figure 1.
3.2 The spray device of the equipment should be able to spray water evenly onto the surface of the test piece to form a continuous water curtain. 3.3 The detection device should be equipped with a safety net to prevent the test piece from being damaged suddenly and causing injury. 4 Test piece
4.1 Each component of the test piece should be a product that has passed the manufacturer's inspection, and the installation and inlay of the test piece should meet the design requirements. No special accessories shall be added or other special measures shall be taken. The glass and glue used in the test piece should be the same as those used in the project.
4.2 The width of the test piece should include at least one vertical load-bearing member that bears the design load. The height of the test piece should include at least one floor height, and there should be two or more connections to the load-bearing structure in the vertical direction. The installation and stress conditions of the test piece should be as consistent with the actual situation as possible.
4.3 The test piece must include typical vertical joints and horizontal joints. 4.4 There should be no air leakage at the joints between the test piece installation port and the test pieces of the test device. 5 Testing methods
After the test piece is installed, it must be checked and the test can be started only after it meets the design requirements. During the inspection, the openable part of the test piece is opened several times and finally closed.
5.1 Preliminary pressurization: The test piece is preliminarily pressurized at a pressure of 250Pa for 5 minutes. Then reduce the pressure to 0, and start the test after the deflection of the specimen is eliminated. 5.2 Watering: Spray the entire specimen evenly with 4L/m2·min of water until the test is completed. The water temperature should be in the range of 8-25℃.
5.3 Pressurization: While watering, pressurize in sequence according to the specified pressure levels. The duration of each level of pressure is 10rnin, until serious leakage occurs in the indoor side of the open part and the fixed part of the specimen respectively. The pressurization form is divided into two types: stable and fluctuating. The fluctuation range is 3/5 of the stable pressure, and the fluctuation period is 3s. See Figure 2, Figure 3 and Table 1, Table 2 respectively. 250
o25o3som
100150
Time (min)
Figure 2 Schematic diagram of stable pressurization sequence
Pressurization sequence
Stable pressure
Pressurization sequence
Upper limit
Fluctuating pressure
Average value
Lower limit
V. Building decoration materials
Time (min)
Figure 3 Fluctuating pressurization sequence diagram
5.4 Record: Record the pressure difference, leakage location and leakage condition during leakage. 5.5 Judgment: The pressure difference that the specimen bears when serious leakage occurs is used as the basis for judging the rainwater leakage performance. The pressure difference of the previous level of the pressure difference is used as the grading index value of the rainwater leakage performance of the specimen. 6 Test reportwwW.bzxz.Net
6.1 The test piece type, specifications and dimensions and related diagrams (including exterior and interior facades, longitudinal and transverse sections and sections of profiles and accessories) must indicate the test piece's support system and drainage system, and mark the size and position of the drainage holes, as well as the opening method of the openable part;
6.2 Type, thickness, maximum size and inlay method of glass;6.3 Material and brand of sealing materials;
6.4 Name, material and brand of accessories;
6.5 Main instruments and equipment used for testing;
6.6 Temperature and air pressure of the testing room;
6.7 Test results
a. Test water volume;
b. Pressure difference when serious leakage occurs between the openable part and the fixed part: 436
Part C. Diagram of leakage location.
6.8″Test date and test personnel.
Additional notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the China Building Standards Institute, the technical unit responsible for building products and equipment standards of the Ministry of Construction. This standard was drafted by the Institute of Building Physics, China Academy of Building Research. The main drafters of this standard are Tan Hengyu, Liu Hao, and Gao Xijiu. This standard is entrusted to the Institute of Building Physics, China Academy of Building Research for interpretation. 32. "General Test Methods for Building Adhesives" GB/T12954-91 Subject content and scope of application
This standard specifies the general test methods for density, pH value, viscosity, solid content, storage stability, application period, glue coating amount and bonding strength of building adhesives.
This standard applies to adhesives for building decoration. 2 Reference standards
GB2611 General technical conditions for testing machines
GB2794 Method for determining viscosity of adhesives (rotary Viscometer method) GB2954 Synthetic latex pH value determination method
3 Test conditions
Sample curing temperature is (23±2)℃, relative humidity is 50%±5%. 4 Sampling and preparation
4.1 According to different batches, randomly select the number of containers specified in Table 1 from the batch. Use an appropriate sampler to take approximately equal amounts of samples from each container (pre-stirred). The total amount of mixed samples is about 1.0L, and after being fully mixed, it is used for various tests. Table 1
Batch size (number of containers)
126-216
Number of extractions (minimum value)
Batch size (number of containers)
217~343
344~512
513~729
730~1000
4.2 Before use, the specimens and test materials should be placed under test conditions for no less than 12 hours. Number of extractions (minimum value)
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