Aluminum Alloy Curtain Wall Sealing Failure Analysis and Countermeasures-WJW Aluminum Supplier Aluminum

Analysis and countermeasures of aluminum alloy curtain wall sealing failure

The frame and wall are composed of enclosure structure and metal boards. They do not assume the main structure loads. They have the advantages of beauty, energy saving, and convenient maintenance. It is the preferred implementation mode and formation of modern high -rise buildings [1]. Aluminum profile belongs to painting technology. It is based on the traditional titanium plating process, adding pre -plating and electroplating processes. The pre -plating process is to place the activated electroplating parts in the salt and hydrochloride solution for chemical treatment. "Aluminum is a coating technology. It is based on the traditional titanium plating process, adding pre -plating and electroplating processes. The pre -plating process is to place the activated electroplating parts in the salt and hydrochloride solution for chemical treatment. "On the doors and windows of aluminum doors and windows, the material is connected to the wall. "Its main feature is that most of the surfaces at the junction of the wall are plane, fixed on the wall, and cannot move. Modern ", glass door building curtain wall, stone curtain wall, metal curtain wall, curtain wall and other main forms are artificial board. Metal panel aluminum plate, fireproof board, stainless steel plate, paint steel plate, etc. 铝幕墙"具有以下特点1)色彩丰富外观持久外形多样化可与玻璃完美结合石墙通过喷涂工艺实现2)重量轻仅15石墙玻璃墙1/3 A significant reduction of the weight of the exterior wall of the building; 3) low maintenance costs, high cost benefits. Because the aluminum curtain wall has many advantages, it is favored by the majority of car owners. At present, aluminum, aluminum, aluminum, aluminum -plastic composite board, aluminum honeycomb board.

With the use of aluminum curtain walls, more and more sealing failures have occurred. The damage caused by the failure of the aluminum curtain wall is the leakage of the curtain wall, which can easily cause damage to the internal decoration of the building, corrodes the curtain wall anchor, and affect the safety of the company's building. At the same time, the failure of sealing will continue to increase the energy consumption of my country's architecture. This article studies and analyzes the common causes of the failure of aluminum curtain walls, and found effective teaching methods for enterprises.

Reasons for the failure of aluminum board wall sealing

The reasons for the failure of the aluminum curtain wall sealing structure are: unreasonable design methods, improper selection of sealing glue, poor adhesion, and improper management and management of construction process.

2.1 Interface design and sealing plastic position wrong match

During the use of the aluminum curtain wall interface, cracks often occur during use, as shown in Figure 1, especially when the seasonal changes are large, the temperature difference between day and night is particularly large, and the temperature is too large, which causes the sealing rubber plate to shrink. This is mainly because the drainage capacity of sealing glue cannot meet the actual requirements. When calculating the width of the seam density seal, in addition to considering the telescopic of the plate, the displacement and installation error caused by the dynamic load of the floor should also be considered. The following formula is used to calculate the smaller width required for the interface:

Smaller width = (100/x)*(mtml)锝

Among them, X: The displacement analysis ability of the sealing glue (%)

MT: Dress due to thermal expansion (millimeter)

ML: Disposal due to the effect of dynamic load (mm)

TC: Building error (millimeter)

Designers should choose a sealing glue with a reasonable replacement ability to avoid cracks due to insufficient sealing ability. The replacement ability of the seal should be carried out according to the report of the national authoritative testing center. In the design, you should also pay attention to the double -sided bonding of the sealing glue on the interface, not three sides of the bonding. When three sides of bonding occur, sealing can only withstand 15%of the design capacity. For deeper connectors, the polyethylene foam stick should be used to control the thickness of the seal; for shallow connections Leave from the bottom. Because the use of anti -adhesive tape or polyethylene foam sticks can effectively avoid three -sided keys.