Redispersible latex powder manufacturers analyze the reasons for cracks in thermal insulation mortar
The phenomenon of cracks in thermal insulation mortar occurs from time to time in construction, so we make a simple analysis of this phenomenon at SLEOCHEM, and the thermal insulation system is conducive to the establishment of a more reasonable temperature field for buildings.
Due to the use of external thermal insulation, the internal structures such as brick walls or concrete are protected, which increases the temperature of the main structure inside the thermal insulation layer in winter. The humidity is reduced, the temperature change is relatively gentle, the temperature stability of the structure is increased in summer, and the thermal stress of the wall structure is reduced, thereby greatly reducing the risk of cracks, deformation and damage of the main wall, and the building life can be greatly extended. Perfect external insulation covers the skeleton of the structure in an all-round way. Rain, snow, freeze, thaw, dry, wet, etc. on the main wall is greatly reduced. Therefore, the external thermal insulation system is better than the internal thermal insulation system in protecting the building structure and preventing the occurrence of cracks, and it is even better than the mixed method of internal and external thermal insulation.
Redispersible latex powder is commonly used in thermal insulation mortar to increase the toughness and strength of the product. The dosage is large, and the wall is particularly firm in the later stage.
The base layer putty has poor waterproof effect, or the base layer is oily and dirty during construction, or the waterproof effect of the entire decorative layer is not good.
1. Insulation mortar insulation board insulation layer.
The leveling mortar and the hollow of the main wall, especially for long-term water seepage, are prone to continuous hollow expansion, which will cause the insulation layer to be hollowed or partially damaged. The wind pressure resistance measures are unreasonable.
2. Thermal insulation mortar slurry material thermal insulation layer.
Improper handling of the wall interface, except for the clay brick wall, other walls should be treated with interface mortar and then coated with slurry insulation material, otherwise it is easy to cause direct hollowing of the thermal insulation layer or failure of the interface treatment material, resulting in the hollowing of the interface layer and the main wall. , the thermal insulation layer is hollowed together, and the thermal insulation layer is not effectively restrained and the load is carried. The interface treatment of the composite thermal insulation layer formed by the slurry thermal insulation material and the thermal insulation board is unreasonable. .
3. The exterior walls of coastal areas or high-rise buildings adopt unreasonable bonding methods that are not nail-bonded, and it is easy to form some insulation panels that are damaged by wind pressure and hollow and fall off. Cracks, hollowing, long-term water seepage, frost heave, etc. occur due to large stress structure, and hollowing or falling off over time.