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Specification for dry hanging of curtain wall stone
Date：2020-08-29 09:40:00
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With the development of social economy and the improvement of urban appearance, the scene of construction industry is also lively, which also drives the development of decoration industry. Stone curtain wall has occupied a considerable proportion in the external decoration of buildings. Gorgeous stone curtain wall indeed adds luster to the decoration of the city face, and has become one of the important symbols of modern urban architecture. These gorgeous back can not be lack of various curtain wall accessories. Today, I'd like to talk about the application of dry hanging glue, one of the important auxiliary materials for dry hanging of curtain wall stone.
Stone dry hanging glue plays an important role in the specification of curtain wall stone dry hanging, and its quality directly affects the overall quality of the project. The state clearly stipulates that the "lifelong responsibility system" is implemented for the construction project, but the phenomenon that it does not conform to the construction specifications is still happening.
In 2001, China issued the specification of epoxy adhesive for dry hanging stone curtain wall (jc887-2001). According to the characteristics of stone curtain wall, six mandatory indexes are specified, and the quality index of adhesive used in construction and decoration engineering departments is specified. This is a favorable measure for the development of the stone curtain wall dry hanging industry, which makes the construction unit have reasonable basis and evidence to test in the construction process, and points out the direction for the stone curtain wall construction to enter the right track in the future. In the construction process of dry hanging of stone curtain wall, stone materials weighing dozens of kilograms are bonded to the hanging pieces with the force of four or two kilograms. The quality of dry hanging glue is directly related to the installation quality and effect of stone materials. Therefore, we should follow the principle of seeking truth from facts. In the process of dry hanging construction of stone curtain wall, the dry hanging adhesive of epoxy resin stone curtain wall is used, which has special performance The points are anti-corrosion, high temperature resistance, anti-aging, high strength and good firmness.
Stone dry hanging glue plays an important role in the specification of curtain wall stone dry hanging, and its quality directly affects the overall quality of the project. The state clearly stipulates that the "lifelong responsibility system" is implemented for the construction project, but the phenomenon that it does not conform to the construction specifications is still happening.
For a long time, in the process of dry hanging construction of stone curtain wall, some decoration companies have been using dolomite glue for bonding. In fact, this is a more dangerous practice. Although the dolomite glue has the characteristics of high hardness, polishing property and fast curing speed, it is easy to penetrate oil into the stone and affect the beauty of the stone because it has not been completely deoiled. Relatively speaking, the influence of temperature on the dolomite glue is relatively large, and it is not suitable for construction under low temperature conditions. Its bonding strength is also weaker than that of dry hanging stone adhesive, especially for wet and sunshine free Irradiation of the wall, the service life will be shorter, there is no security. Cels dolomite glue can be applied at low temperature (- 10 ~ 45 ℃), but due to its inherent brittleness, it is suggested that construction enterprises should first fix the stone materials with cels dolomite glue before fixing them for a long time, so as to ensure the standard of stone dry hanging.
In 2001, China issued the specification of epoxy adhesive for dry hanging stone curtain wall (jc887-2001). According to the characteristics of stone curtain wall, six mandatory indexes are specified, and the quality index of adhesive used in construction and decoration engineering departments is specified. This is a favorable measure for the development of the stone curtain wall dry hanging industry, which makes the construction unit have reasonable basis and evidence to test in the construction process, and points out the direction for the stone curtain wall construction to enter the right track in the future. In the construction process of dry hanging of stone curtain wall, stone materials weighing dozens of kilograms are bonded to the hanging pieces with the force of four or two kilograms. The quality of dry hanging glue is directly related to the installation quality and effect of stone materials. Therefore, we should follow the principle of seeking truth from facts. In the process of dry hanging construction of stone curtain wall, the dry hanging adhesive of epoxy resin stone curtain wall is used, which has special performance The points are anti-corrosion, high temperature resistance, anti-aging, high strength and good firmness.
Dolomite glue and stone dry hanging adhesive have different performance characteristics, so their uses are also different. Dolomite glue is used for the bonding of stone and stone and the repair of stone. Its composition is unsaturated polyester, which belongs to the combination of steel. Its advantage is that the curing time is easy to adjust in the dry hanging project of stone. However, due to the imbalance of unsaturated polyester and curing agent, the shear force is insufficient and the stress is large. Under the action of temperature difference and vibration conditions, the displacement is relatively large and easy to open The dry hanging adhesive for stone is a special adhesive for bonding stone and metal. Its composition is epoxy resin, which is combined by a and B. It is simple and clear. It belongs to flexible combination, and it does not leak oil and pollute stone. It has strong anti-seismic and distortion performance, small stress, and no influence on bonding strength. Under the action of temperature difference and vibration conditions, the displacement caused by expansion and settlement is small.
Matters needing attention for dry hanging of stone materials:
1. If the bonding surface is too smooth, please be sure to polish and roughen;
2. During the initial drying period, the adhesive can not be loaded with heavy load;
3. The paste surface should be dry and not wet (moisture content should not be higher than 15%), dust-free, oil-free, firm and not loose;
4. The bonding surface is too smooth and must be rough treated. The materials (paint and rust layer on metal surface) that affect the bonding effect must be removed;
5. When the temperature is low in winter, the colloid can be heated to 30 ~ 40 ℃;
6. The adhesive parts beyond the effective time of construction can not be moved any more. If it needs to be moved, the adhesive should be adjusted and pasted again;
7. If welding installation is required in construction, the welding point should be more than 3 cm away from the adhesive paste;
8. The mixed glue cannot be returned to the barrel.
In order to ensure the quality and safety of stone curtain wall dry hanging project, we should have a clear distinction between the use of dolomite glue and stone dry hanging glue, and benefit the country and the people.
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