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GB/T 13477.15-2017: Test method for building sealants -- Part 15: Determination of adhesion/cohesion properties after exposure to heat and artificial light through glass and to water Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 13477.15: Historical versions
Similar standardsGB/T 13477.15-2017: Test method for building sealants -- Part 15: Determination of adhesion/cohesion properties after exposure to heat and artificial light through glass and to water---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT13477.15-2017 GB NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA ICS 91.100.50 Q 24 Replacing GB/T 13477.15-2002 Test method for building sealants - Part 15: Determination of adhesion/cohesion properties after exposure to heat and artificial light through glass and to water (ISO 11431:2002, Building construction - Jointing products - Determination of adhesion/cohesion properties of sealants after exposure to heat, water and artificial light through glass, MOD) ISSUED ON: MAY 31, 2017 IMPLEMENTED ON: APRIL 1, 2018 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of ContentsForeword ... 3 1 Scope ... 6 2 Normative references ... 6 3 Terms and definitions ... 6 4 Principles ... 7 5 Standard test conditions ... 7 6 Test apparatus ... 7 7 Specimen preparation ... 9 8 Specimen processing ... 10 9 Test steps ... 10 10 Test report ... 12 Appendix A (Informative) Structural changes in this part compared with ISO 11431:2002 ... 13 Appendix B (Informative) Technical differences between this part and ISO 11431:2002 and their reasons ... 14ForewordGB/T 13477 Test method for building sealants is divided into 20 parts: -- Part 1: Specifications for test substrates; -- Part 2: Determination of density; -- Part 3: Determination of extrudability of sealants using standardized apparatus; -- Part 4: Determination of extrudability of one-component sealants; -- Part 5: Determination for tack-free time; -- Part 6: Determination of flow; -- Part 7: Determination of low-temperature flexibility; -- Part 8: Determination of tensile properties; -- Part 9: Determination of adhesion/cohesion properties after immersion in water; -- Part 10: Determination of tensile properties at maintained extension; -- Part 11: Determination of tensile properties at maintained extension after immersion in water; -- Part 12: Determination of adhesion/cohesion properties at constant temperature; -- Part 13: Determination of adhesion/cohesion properties at variable temperatures; -- Part 14: Determination of resistance to prolonged exposure to water; -- Part 15: Determination of adhesion/cohesion properties after exposure to heat and artificial light through glass and to water; -- Part 16: Determination of resistance to compression; -- Part 17: Determination of elastic recovery; -- Part 18: Determination of adhesion-in-peel; -- Part 19: Determination of change in mass and volume; -- Part 20: Determination of staining. This part is Part 15 of GB/T 13477. Test method for building sealants - Part 15: Determination of adhesion/cohesion properties after exposure to heat and artificial light through glass and to water1 ScopeThis part of GB/T 13477 specifies the method for determining the adhesion properties of sealing materials after cyclic exposure to heat, water, and artificial light through glass. This part is applicable to the determination of changes in the adhesion properties of sealing materials after cyclic exposure to heat, artificial light, and water. NOTE: The cyclic exposure test of the specimen to heat, light source and water is similar to the natural aging conditions of sealing materials in actual use. Compared with the actual use conditions, the acceleration factors are unknown and cannot be used to evaluate the durability of sealing materials. However, a minimum performance guarantee for glazing can be obtained.2 Normative referencesThe following documents are essential to the application of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document. GB/T 13477.1-2002 Test method for building sealants - Part 1: Specifications for test substrates (ISO 13640:1999, MOD) GB/T 14682 Building sealing material vocabulary (GB/T 14682-2006, ISO 6927:1981, NEQ) GB/T 16422.2-2014 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources (ISO 4892-2:2006, IDT)3 Terms and definitionsThe terms and definitions defined in GB/T 14682 apply to this document.4 PrinciplesThe sealing material sample is bonded between the surfaces of two parallel glass plates to make a specimen. After the specimen is cyclically exposed to artificial light and water at the specified temperature, the specimen is stretched to the specified width. After the tensile state is maintained for the specified time, the adhesion/cohesive failure mode of the specimen is checked.5 Standard test conditionsThe standard test conditions of the laboratory are as follows: a temperature of (23±2) ℃, and the relative humidity of (50±5) %.6 Test apparatus6.1 Glass substrate: A glass plate that complies with the provisions of 4.2 in GB/T 13477.1-2002, with a thickness of 6 mm, and is used to prepare specimens. Each specimen consists of two glass plates, and the cross-sectional dimensions are shown in Figure 1. Test substrates of other sizes can also be used, but the bonding area of the sealing material shall be the same as shown in Figure 1. 6.2 Spacer block: The surface shall be anti-adhesive and used to prepare a sealing material specimen with a cross-section size of 12 mm×12 mm (see Figure 1). 6.3 Bond breaker: Anti-adhesive film or anti-adhesive paper, such as polyethylene (PE) film, is used to prepare specimens. It should be selected according to the recommendations of the sealing material manufacturer. 6.4 Blast drying oven: The temperature can be adjusted to (70±2) ℃, used for processing specimens according to method B (see 8.3). 6.5 Container: It is filled with deionized water or distilled water, and used for soaking the specimen during processing according to method B (see 8.3). 6.6 Test chamber with artificial light source: It can expose the specimen to a light source under dry conditions at the specified temperature (that is, the temperature measured by the black standard thermometer). The test chamber shall be fully ventilated, and the light can be directly irradiated on one surface of the glass substrate. (see Figure 1). If fully automated equipment is used, the water exposure test can be carried out in the same test chamber. It can be either immersed in water or sprayed, but deionized water shall be used. For cyclic exposure test equipment with a spray system, see GB/T 16422.2-2014. nm~400 nm, the average irradiance on the surface of the specimen is (60±2) W/m2; or when the wavelength is 340 nm, the irradiance is 0.51 W/(m2 • nm). 6.8 Black standard thermometer: It shall comply with the provisions of 4.4 in GB/T 16422.2-2014. Black panel thermometers may also be used, which under given operating conditions will indicate a lower temperature than a black standard thermometer. The temperature difference between the two measurements may be as much as 10 °C. Readings can only be taken after sufficient time has elapsed for the temperature to become more stable. Temperature can also be controlled, for example by adjusting the air velocity. 6.9 Tensile testing machine: It is equipped with a recording device and capable of stretching the specimen at a speed of (5.5±0.7) mm/min. 6.10 Positioning block: It is used to control the width of the stretched specimen, allowing the specimen to maintain an elongation rate of 60%, 100% of the initial width, or the width agreed upon by all parties. 6.11 Measuring tool: The graduation value is 0.5 mm.7 Specimen preparationClean the glass substrate with acetone and other solvents and dry it. Prepare test specimens in accordance with the sealing material manufacturer's instructions (e.g. whether to use primer and mixing procedures for multi-component sealing materials). Prepare 3 specimens at the same time for each group. Before preparing the specimen, keep the sealing material and glass substrate at (23±2) °C. As shown in Figure 1, assemble two adhesive substrates and two spacer blocks on the bond breaker to form a cavity. Then, the sealing material sample is embedded in the cavity to make a specimen. The following matters shall be noted when embedding samples: a) Avoid the formation of bubbles; b) Squeeze the sample onto the bonding surface of the substrate to ensure a dense adhesion; c) Trim the surface of the sample so that it is flush with the upper surface of the substrate and block. Put three specimens into the test chamber and conduct a cyclic exposure test according to the conditions specified in 9.2.2 or 9.2.3. 9.2.2 Automatic cycling The standard conditions of the test are as follows: a total exposure time of 500 h, 250 cycles, and each cycle is 120 min; each cycle includes: a) Drying period (102 min): During this period, the specimen is exposed to light and heated. Starting from the drying period, increase the temperature until it reaches the stable black standard temperature of (65±3) ℃; b) Wet period (18 min): Spraying or soaking in water can be used, and the water temperature is (25±3) ℃. The light source can be turned off during the wet period. 9.2.3 Manual cycling Manually transfer the specimen between the dry test chamber and the wet test chamber. At this time, water immersion shall be used during the wet period. Mark any surface of the specimen to ensure that the same surface is always exposed. The specified test conditions are as follows: 168 hours per cycle, and a total exposure time of 3 cycles of 504 hours; each cycle includes: a) Drying and wet exposure period (5 d): immersion in water of (25±3) ℃ for 5 h and then exposure to light for 19 h at the black standard temperature of (65±3) ℃ every day; b) Drying exposure period (2 d): exposure to light for 48 h at a black standard temperature of (65±3) ℃. 9.3 Tensile test After the artificial climate cyclic exposure test, the specimen is stored under standard test conditions for 24 hours. Place the specimen into the tensile testing machine and stretch the specimen at a speed of (5.5±0.7) mm/min. The tensile elongation rate is 60% or 100% of the initial width (stretched to 19.2 mm or 24 mm respectively), or the width agreed upon by all parties; use the positioning block (6.10) to fix the stretched specimen and keep it at (23±2) ℃ for 24 h. Remove the positioning block, check the adhesion/cohesive failure of the specimen, and use a measuring tool with a graduation value of 0.5 mm to measure the depth (mm) of adhesion/cohesive failure. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 13477.15-2017 be delivered?Answer: The full copy PDF of English version of GB/T 13477.15-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 13477.15-2017_English with my colleagues?Answer: Yes. 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