Many buildings are using metal carved panels, because this can enhance the overall design of the building's appearance. However, many exterior wall panels have some damage, such as bulging or falling off of exterior wall panels. This phenomenon has a certain relationship with the adhesion of the board. If the adhesion is not enough, it will easily cause the board to fall off. phenomenon.
Some carved boards have been used for a long time and the bonding layer has fallen off. The reason for this phenomenon is that the bonding area is less than 30%; sag occurs in the bonding, causing local void or virtual bonding; leveling the mortar and the main wall hollow, especially for a long time Water seepage, prone to continuous hollowing and expansion of the hollowing area, causing the insulation layer to be hollowed or partially damaged; the surface load of the insulation board is too large, it is easy to peel off the insulation layer directly; the use of negative wind pressure resistance measures is unreasonable, It is very easy to form that certain insulation plates are damaged by wind pressure and hollow and fall off. At the same time, pay attention to the length of the bonding time.
The correct solution is to train on-site quality inspectors to understand the characteristics of various materials and on-site inspection methods based on the understanding of the insulation structure. Control the area of bonding during construction. Do not add too much water to the bonding materials used. When the interface treatment is performed on the base surface of the site wall, the protective measures for areas with greater positive and negative wind pressure shall be bonded and reinforced with rivets and maximized The bonding area is tested and compared with the time of bonding materials, and the manufacturer’s laboratory is evaluated on the spot.
Metal carved panels should fully consider the bonding strength requirements when used in the external wall insulation system during the material preparation. As long as the requirements can be complied with and produced in accordance with the standards, the bonding strength of general products is still relatively good.