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2024

[Construction] In this way, the wall surface will not be hollowing and cracking.

Putty layer empty drum, the origin of the bubble Putty layer hollowing, foaming, mainly due to the presence of gas between the base and the putty layer. There is a dense layer between the base layer and the putty layer. If the interface agent does not add water for interface treatment, the air cannot normally diffuse to the base layer. Improper handling of the grass-roots level, so that the putty layer and the grass-roots contact is not close enough, the formation of interlayer. Steps of scraping putty powder 1, putty powder generally after mixing evenly, let stand for 15 minutes, let the various ingredients fully wet and dissolved, and then use the electric mixer to stir again on the wall. 2, putty construction should be in the wall repeatedly batch scraping, grinding......

Putty layer empty drum, the origin of the bubble
Putty layer hollowing, foaming, mainly due to the presence of gas between the base and the putty layer. There is a dense layer between the base layer and the putty layer. If the interface agent does not add water for interface treatment, the air cannot normally diffuse to the base layer. Improper handling of the grass-roots level, so that the putty layer and the grass-roots contact is not close enough, the formation of interlayer.
Steps of scraping putty powder
1, putty powder generally after mixing evenly, let stand for 15 minutes, let the various ingredients fully wet and dissolved, and then use the electric mixer to stir again on the wall.
2, putty construction should be in the wall repeatedly batch scraping, rolling, so that putty and the grass-roots full penetration, diffusion, contact, wet.
3, the construction of the second or last surface layer putty layer foaming phenomenon, should be before the watermark elimination with a scraper for pressure bubble breaking treatment, to ensure that no bubbles appear on the putty surface.
4, a large area of foaming putty surface, re-use the interior wall putty powder batch scraping foaming surface.
Why putty powder will be so serious
Putty itself there is a problem with the quality of the binder. The binder does not play a role, that is, if the putty layer is too thin or forced ventilation or heating and drying after batch scraping, it will cause water loss to be too fast, and the putty layer will be pulverized seriously if it loses its bonding effect.
Why the putty layer cracks
If the base is not completely dried, the water content of the construction base is greater than or equal to 10%. The putty at the bottom layer passes over the surface before it is completely dried, and the surface layer is dried first, while the inner layer is still in the process of drying. The degree of drying shrinkage between the layers is different, and it is easy to crack. Once the construction is too thick, the internal drying is slow, and the surface drying speed is faster, causing cracking. When the base layer is treated, the joint filling and leveling materials are not completely dried, and the inner wall putty with strong hardness is applied on the top, which is easy to cause cracking.
The first time the putty, the thickness should depend on the surface of the base, the general thickness of 0.8 mm-1.2mm. The first putty is allowed to have a slight needle eye, but no bubbles are allowed. Don't be too thick once the putty is scraped to avoid excessive dry shrinkage and affect the firm bonding between the putty layer and the base layer. When scraping, the force should be balanced, and the surface of the putty layer should be smooth as far as possible without obvious rough surface.
When scraping for the second time, the surface of the putty layer should be smooth as far as possible, and the needle holes should be filled. When scraping, the force should be balanced, and the surface of the putty layer should be smooth as far as possible without obvious rough surface.

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