Many buildings are using metal carved panels, because it 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 voids 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 directly peel off the insulation layer and cause it to fall off; 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. During construction, control the bonding area, do not add too much water to the bonding materials used, and when performing interface treatment on the base surface of the site wall, use bonding and rivet reinforcement for the protection measures in areas with greater positive and negative wind pressure and maximize them 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 of the external wall insulation system when they are used in the material preparation. As long as they can comply with the requirements and are produced in accordance with the standards, the bonding strength of general products is still relatively good.