As the outer protective structure of the building, the glass curtain wall not only has good appearance quality, but also has perfect physical properties, so as to better serve the entire building system and create a comfortable and harmonious living environment for people.
The physical performance test of the glass curtain wall also verifies the feasibility of the curtain wall design, as well as the performance testing of the materials and components, as well as the inspection of the installation process and installation quality. When performing glass curtain wall inspection, the stress state of the test piece assembly and installation should be consistent with the actual situation of the project, and the consistency between the test specimen and the design pattern should be ensured. During the installation of the test piece, if there is any difference in the material type of the component, the installer should be notified immediately to correct the error, so as to avoid leaving hidden troubles for the subsequent inspection work.
First, the performance test of materials and components
1. On-site sampling inspection of the pull-out force of the rear embedded parts (anchors) before installation of the curtain wall.
2. Silicone building (weathering) sealant should be tested for compatibility with the materials it contacts before use.
3. Silicone structural sealant should be tested for compatibility and peel adhesion with its contact materials before use, and should be retested for Shore hardness and standard state tensile bond properties. There should be a commodity inspection report for imported silicone structural seals.
4. Two-component silicone structural sealant consists of two components, a base and a curing agent. Before use, the mixing (butterfly) test and the pull-off (plastic cup) test should be carried out to verify the mixing of the structural adhesive. Whether the mixing ratio of the two components of the uniformity and the structural adhesive is correct.
5. The processed hidden frame and semi-hidden frame glass plate were randomly selected and subjected to a peeling test to test the degree of curing of the structural adhesive and the bonding strength between the structural adhesive and the aluminum ore.
6. During the installation of the whole glass curtain wall, the levelness and verticality of the adjustment panel and glass rib should be checked at any time.
7. The aluminum-plastic composite panel shall be tested for peel strength.
8. Detection of bending strength, radioactivity and frost resistance of stone panels. The strength test of structural glue for stone curtain wall and the pollution detection of sealant.
9. Curtain wall energy-saving works In addition to materials for re-inspection according to general curtain wall requirements, the following properties of the following materials shall be added for re-inspection: heat transfer coefficient, shading coefficient, visible light transmittance, hollow glass dew point, and thermal insulation material of curtain wall glass Thickness, density, thermal conductivity, combustion performance, compressive strength, tensile strength and shear strength of insulating profiles.
Second, the glass curtain wall detection method Glass curtain wall inspection is divided into laboratory inspection and on-site glass curtain wall reliability testing.
1. When you are inspecting the glass curtain wall laboratory, you will encounter the following problems: (1) The problem of airtightness detection of the glass curtain wall. The airtight performance of the glass curtain wall is related to the heat preservation and energy saving effect of the curtain wall. The airtightness inspection of the glass curtain wall can find problems in the design and installation process of the curtain wall, and improve the airtightness index of the curtain wall through the solution of the problem to achieve the purpose of heat preservation and energy saving.
(2) Common problems in watertightness detection of glass curtain wall. Rainwater leakage is a common form of functional failure during the use of glass curtain walls. Factors causing leakage of rainwater include the presence of gaps or holes in the surface of the test piece, the presence of rainwater, and the presence of pressure differences between the inside and outside of the test piece. The test of the laboratory is convenient for discovering the cause of rainwater leakage in the curtain wall test piece, and then taking measures to adjust the design and construction plan so that the watertight performance test index of the test piece meets the design requirements.
(3) Common problems in curtain wall wind pressure detection. At present, the wind pressure design of the curtain wall is mostly based on relevant design specifications and calculation software. With the continuous improvement of the relevant specifications of the curtain wall and the gradual maturity of the calculation software, the test piece can generally meet the design requirements when it is tested for wind pressure resistance. There are two points to note during the test.
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