Because of its fashionable appearance, gorgeous color, good landscape effect and lighting effect, the glass curtain wall is favored by designers. China's existing glass curtain wall area exceeds 500 million square meters, has become the world's largest glass curtain wall production and use country. With the requirements of urban landscape and architectural art, some new design forms of buildings, high-rise and super high-rise buildings can be seen everywhere, which brings us convenient life and new visual enjoyment. At the same time, the safety and service life of glass curtain wall are also put forward higher requirements.
Silicone sealant has become an ideal material for glass curtain wall bonding and sealing because of its excellent high and low temperature resistance, weather aging resistance, ozone resistance, good adhesion to all kinds of base materials and strong displacement resistance. Its quality directly affects the safety and service life of glass curtain wall. In order to ensure the safety and service life of the glass curtain wall, the service life of the sealant is required to be consistent with the design service life of the curtain wall structure, that is to provide 25 years of quality assurance. In order to meet the needs of market development, sealant suppliers have launched 25 year warranty silicone sealant, and issued a 25 year warranty for the project using their products. However, the product quality of these sealant manufacturers is uneven, how to ensure the validity of their 25-year warranty remains to be considered.
Requirements for sealant supplier to issue 25 year warranty certificate third party test report
The supplier shall provide the test report of a qualified third-party testing organization that meets the requirements of H type in JG / t475 or JG / T 471 or Etag 002 of the European Union. The test report shall cover all test items related to silicone structural sealant in JG / t475 or JG / T 471 type H or EU etag002 specification. In recent years, we have found that some suppliers are confusing, and the third-party test reports provided by them are missing or missing.
Testing ability
The supplier shall have the testing ability (including testing equipment, testing technology, etc.) according to the requirements of H type in JG / T 475 or JG / T 471 or Etag 002 specification of EU, and shall provide the delivery test report of each batch of products meeting the requirements of enterprise standards. The enterprise standard shall be filed with the local technical supervision department, and at least include the requirements of consistency (infrared spectrum analysis, thermogravimetry analysis), water ultraviolet light 1008h, salt fog, acid fog, curtain wall cleaner, shear, tear, fatigue and other test items in JG / T 475, JG / T 471 type H or EU Etag 002 specification.
Consistency requirements
In order to ensure the consistency between the actual glue used in the project and the products in the bidding documents provided by the supplier, the samples can be directly taken from the site during the construction process and sent to the third-party authoritative testing agency for testing. The testing items shall at least include the H-type in JG / T 475, JG / T 471 or the EU Etag Test items of "thermogravimetry analysis, infrared spectrum analysis, 1008h water ultraviolet irradiation, 80 ℃ shearing, tearing, curtain wall cleaner" in 002 specification requirements. Among them, the thermogravimetry analysis and infrared spectrum analysis spectrum of sealant products in the construction site sampling product and the bidding data of the supplier shall be consistent; the test results of both "1008h water ultraviolet light, 80 ℃ shearing, tearing, curtain wall cleaner" test items shall be consistent.
Matching silicone weather resistant sealant
In addition to the silicone structural sealant meeting the requirements of H type in JG / T 475 or JG / T 471 or Etag 002 in EU, the supplier shall also provide silicone weather resistant sealant meeting the requirements of LM in iso116000. For the sealant used for high-rise and super high-rise glass curtain walls and daylighting roof joints, while meeting the above requirements, it shall also meet the national standard GB / T 22083 or ASTM c920, Grade 100 / 50.
Engineering case
The supplier shall provide the name of engineering case with warranty of 25 years and corresponding supporting materials.
Therefore, the supplier of silicone sealant products has the following conditions at the same time, and the 25-year warranty letter issued for the project using its products is effective and credible:
(1) Provide the test report of the third-party testing organization with testing qualification that the silicone structural sealant meets the requirements of H type in JG / T 475 or JG / T 471 or Etag 002 of European Union.
(2) Have the testing ability (including testing equipment, testing technology, etc.) according to the requirements of H-type or European Etag 002 specification in JG / T 475 or JG / T 471 of the construction industry standard, and provide the factory testing report of each batch of products meeting the requirements of the enterprise standard.
(3) During the construction process, samples are directly taken from the site and sent to the third-party authoritative testing organization for testing. The test results are consistent with the product performance in the bidding data provided by the supplier.
(4) Provide silicone weatherproof sealant meeting LM requirements of iso116000 or 100 / 50 requirements of GB / T 22083 or ASTM c920.
(5) Provide the name of engineering case with warranty of 25 years and corresponding supporting materials.
Zhengzhou Zhongyuan silande High Tech Co., Ltd. has always adhered to the awe of safety and responsibility, adhering to the enterprise concept of "for the country, for the society, and for the employees", and the high-quality peers, forge ahead, let customers buy sealant, buy the peace, ease and comfort!
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Reference
[1] Huang Yingchang, Chang Zhengqin. Elastic sealant and adhesive [M]. Beijing, chemical industry press, 2003
[2] ETAG 002-2012 Guideline for European technical approval for structural sealant glazing(SSGS).
[3] JG / T 471-2015 insulating glass elastic sealant for building doors, windows and curtain walls
[4] JG / T 471-2015 silicone structural sealant for building curtain wall
[5] JGJ 102-2003 technical code for glass curtain wall engineering
Authors: Zhang Rongrong, Xing fengqun, Zhang Zhixin, Su Huifang, Zhao Yanguang