Measures to prevent wall cracks after interior wall plastering(Ⅰ)

Measures to prevent hollowing of walls:

1. Before plastering or roughening, it is necessary to clean the dirt on the wall and water it in advance.
2. Roughening treatment is used for the concrete base to enhance the bonding strength.
3. If the total thickness of the plastering layer is greater than 35mm, steel wire mesh reinforcement measures need to be taken as required.
4. Plastering should be done at least twice, each time should be 7~8mm, not more than 10mm. The appropriate thickness of the surface layer is 7~10mm. Before each plastering, the quality of the last plastering needs to be checked and processed before continuing.

Measures to improve the visual quality of wall plastering:

1. After the surface plastering construction is completed, it is necessary to wait until there is no visible water on the surface. Use a sponge dipped in water to brush it in the same direction vertical to the ground to ensure that the color of the surface plastering surface is the same.
2. To ensure the quality of plastering, the pipeline plastering construction must be completed before the pipeline is installed.
3. Treatment of hollowing and cracking problems: When repairing hollowing and cracks on the wall, the surface roughening is the same as the original wall. The entire wall surface with more repairs in the kitchen and bathroom should be uniformly scraped with a layer of polymer anti-cracking plaster mortar.
4. Maintenance of wall plastering: reduce the shrinkage stress of the mortar to prevent shrinkage, cracks, and hollowing problems. After the base roughening treatment is completed, continuous watering and maintenance for ≥3 days will be carried out to improve the roughening strength. After the plastering surface layer is completed, continuous watering and maintenance for ≥7 days is required on the second day.
5. Measures for seasonal construction: It is necessary to understand the current temperature when carrying out winter construction. Plastering construction should be arranged as much as possible when the temperature is above 5℃. Before indoor plastering, the door and window openings should be closed to do a good job of indoor insulation. During summer exterior wall construction, the plastering layer needs to be watered and maintained to avoid exposure to the sun. Prevent hollowing and cracking problems.