Common Problems and Treatment Methods of Putty Layer


Release time:

2015-09-21

Author:

New Earth Group

Source:

Common Problems and Treatment Methods of Putty Layer

1. How is the foaming and emptying of putty layer caused and how should it be handled?
The main reason for the empty and foaming of the putty layer is that there is gas between the base layer and the putty layer, and why the air does not diffuse to the surface layer and the internal diffusion of the base layer according to the normal, but appears in the middle, mainly due to the following aspects: improper treatment of the base layer, so that the putty layer and the base layer are not closely enough to formInterlayer; There is a dense layer between the base layer and the putty layer, such as using glue, occupying wood treasure or wall confinement without adding water for interface treatment, so that the air cannot normally diffuse to the base layer.
Solution: If the wall surface has small bubbles or hollowing, it can be treated by polishing and then treated with wall confinement for interface treatment, and then scraped in batches. If the wall surface has a large hollowing drum and has caused a large area of shedding, it is recommended to treat it with wall confinement after all removal, and then scrape it in batches.
2. How is the serious pulverization of putty layer caused and how should it be handled?
After the putty dries, the powder falls off. The root cause can be finally attributed to the fact that the bonding system does not play its role. Why does the bonding system, whether it is an inorganic binder or an organic binder, lose its role can be considered from the following aspects: 1. There is a problem with the quality of the putty's own binder; 2 The binder did not play a roleThe adhesive mechanism of the adhesive is wet mortar containing rubber powder. With the reduction of water absorption at the base layer, reaction consumption of hydraulic materials and volatilization from the surface layer to the air, the resin particles gradually approach, the interface gradually becomes blurred, and the resins gradually fuse with each other, finally becoming a continuous polymer connector. This process mainlyOccurs in the mortar pores and solid surface, so the formation of a bonding effect. However, if we are too thin due to batch scraping putty layer or forced ventilation or heating drying after batch scraping, water will be lost too fast, and the resin particles of the binder cannot form a connecting body well, thus losing the bonding effect.
Solution: For slight powder removal, floating ash can be disposed of with wet towel, then wall shackle can be used for interface treatment, and then batch scraping can be carried out to pay attention to the thickness of batch scraping. If the putty layer is seriously pulverized, it is recommended to use wall shackle for interface treatment before batch scraping.
3. How is the putty layer cracking caused and how should it be handled?
Putty cracking reasons are various, there are external reasons, there are internal reasons. Externally, dry and wet changes form dry shrinkage cracks; temperature changes and thermal expansion and cold shrinkage cause temperature cracks; wall structure deformation static load causes structural cracks, etc. And internally, product quality, construction process (batch scraping thicknessInterface treatment), maintenance methods and many other factors may cause putty cracking.
Solution: Tiny cracks caused by dry and wet, temperature change or batch scraping too thick: polish, brush the wall and then scrape it, pay attention to control the thickness; For large cracks caused by batch scraping too thick, brush the wall after removal, and then putty; For large cracks caused by wall cracking, brush the wall bondage after removal, and stick grid cloth, and then putty batch scraping, if the wall crack is large, it is necessary to deal with the wall.
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