Answers to problems such as poor pink color, moldy, and quick-drying of putty?

Many small problems in the process of scraping putty are often ignored by everyone, which leads to the phenomenon of peeling, bulging, cracks and so on in the later putty.

1.

cause

1.

2.

3.

Approach

1.

2.

2.

cause

1.

2.

3.

Approach

1.
The construction master should pay attention to the surface humidity of the putty when doing the last non-painting and finishing construction.
If it is too dry, it will cause peeling and powder removal.
It is enough to smooth the knife marks when finishing, and it is not suitable for multiple dry scraping
.

2.
If there is an illusion of powder removal caused by the dust attached to the wall, the dust should be removed with a feather bomb after the decoration is completed, or wipe it with clean water and a clean cloth
.

3.
If there is quick-drying powder removal, you should wait for the company's technical staff to come to the scene to identify whether it is caused by the product formula
.

3.
Moldy

cause

When the wall curtain wall is used, the raw material used is a mixed mortar of sea sand and cement, which has relatively high acidity and alkalinity.
This will cause acid-base reactions in the relatively easy-to-damp baseboards or leaking places on the wall, causing the wall.
Hairy, moldy, empty shell, shedding and other phenomena
.

Approach

Remove the moldy and empty walls, and then clean the walls with clean water.
If there are leaks or damp walls, stop the water source in time, and then scrape the alkali-resistant putty powder again after the walls are dry
.

Note: Moldy walls generally appear, basically in the spring when the temperature is higher
.

4.
Quick drying

cause

Due to the hotter summer weather and high temperature, the water evaporates quickly, and the water evaporates quickly during the operation of scraping putty powder, which usually occurs above the second stage of the construction
.

Approach

1.
During construction, the temperature should not be higher than 35℃.
The putty powder with more than two passes should not be scraped too thin or the material is too thin
.

2.
If there is a quick-drying phenomenon, wait for the technician to come to the site to identify whether it is caused by the product formula
.

Note: If there is a quick drying phenomenon, it is recommended that the construction should be completed for about 2 hours before the previous construction, and the next construction should be carried out when the surface is dry, which can reduce the quick drying
.

5.
Pinhole

cause

1.
It is normal for pinholes to appear when scraping the first pass
.
Because the putty powder layer is thick during batch scraping in the first pass, and it is not suitable to be flattened, it will affect the adhesion of the second pass after it is flattened
.
Pinholes in the second and third lines are generally uneven areas on the wall.
Because the uneven areas eat more materials and dry slowly, it is more difficult for the scraper to compact the putty powder in the concave areas, which will produce Some pinholes
.

2.
Insufficient light during construction will cause the construction personnel to ignore some relatively small pinholes on the wall during construction, and some pinholes caused by not being flattened in time
.

Approach

1.
The uneven wall surface should be filled as much as possible during the first stage of construction (because the fine pinholes produced in the first stage will not affect the normal construction of the second stage).
This is conducive to scraping the second and third putty.
When the powder layer is flattened, the generation of pinholes is reduced
.

2.
Pay attention to light during construction.
In case of insufficient light in bad weather or when the light turns from bright to dark in the evening, construction should be carried out with the help of lighting equipment to avoid man-made pinhole problems caused by construction errors
.

Note: Putty powder with higher viscosity or slow drying will also produce some pinholes, so attention should be paid to the rationality of the product formula
.

6.
Delamination

cause

1.
The putty powder produced by some companies is slow-drying.
When the current product is scraped on the wall, it will increase its hardness with time or when it is wet or exposed to water.
The first and last batches of scraping during construction The construction time interval is relatively long.
When the last construction is completed, the grinding will begin.
The outer layer is looser and easier to polish.
When some places are worn through to the previous one, the previous one is placed for a long time and is harder to polish.
, So the two different effects of grinding out the wall will form a similar delamination phenomenon
.

2.
When the last pass is scraped, the pressure is too firm, the harvest is too smooth, the time interval is long, and the hardness of the outer surface film is different from that of the surface layer due to the influence of wet weather and water.
The hardness of the film is different from that of the surface layer.
The inner layer is loose and easy to be ground deep, while the surface film has higher hardness and is not easy to be ground, which will cause delamination
.

Approach

1.
After the previous construction is completed, the time interval is too long due to other reasons that the construction cannot be completed at one time, or due to wet weather, rainy season, water and other reasons; it is recommended to scrape two coats of putty powder during the next construction , In this way, it can avoid the delamination phenomenon caused by the bottom being worn out during sanding
.

2.
When scraping the last pass, be careful not to press too hard.
The wall that needs to be polished can not be polished, and the pinholes and knife marks on the surface can be flattened.
In case of wet weather or rainy season, work should be suspended and wait for the weather.
Work only when it gets better
.
If you encounter wet weather or rain when the last scraping has been approved, you should polish it the next day to avoid the phenomenon of polishing and delamination caused by the surface film of the wall absorbing water and returning to hard
.

7.
Hard to polish

cause

1.
It is more difficult to polish a wall that is too solid or polished during construction, because too solid or polished during construction will increase the density of the putty powder layer, and the hardness of the stronger surface of the wall will also increase
.

2.
After the last batch, those that have not been polished for a long time or have been exposed to water, such as: (wet weather, rainy season, wall water seepage, etc.
) The wall is more difficult to polish, and the product characteristics of slow-drying putty powder are: the hardness can only be achieved after one month.
To achieve the best, if it encounters water, it will accelerate its hardening effect.
The above two situations increase the hardness of the wall and it is more difficult to polish, and the polished wall is rougher
.

3.
The formulas of putty powder are different, and they are mixed together, or the proportion of the formula is adjusted incorrectly, which makes the product harder after batching (such as mixing putty powder for internal and external walls, etc.
)
.

Approach

If the wall is too solid or hard to polish and needs to be polished, it should be roughed with 150# sandpaper first and then 400# sandpaper to modify the pattern or scrape one or two more times before polishing
.

8.
Cracks, cracks, dark marks

cause

1.
Wall cracking occurs due to the influence of external factors in the building, such as the principle of thermal expansion and contraction of temperature, earthquakes, subsidence of foundations and other external factors
.

2.
Due to the incorrect proportion of mixed mortar in the curtain wall, when the viscosity is high, the wall will shrink and cause cracking and cracking after the wall is dry
.

3.
The cracking phenomenon of putty powder will basically form small micro-cracks on the wall, such as chicken melon marks, turtle shell marks and other shapes
.

Approach

1.
Because external forces are uncontrollable, it is difficult to prevent and control them;

2.
The putty powder batch scraping construction should be carried out after the mixed mortar wall is dry;

3.
If the putty powder cracks, it should be confirmed by the company's technical personnel on site to observe the actual conditions of the wall
.

Note:

1.
It is normal for doors, windows, and beam edges to crack
.

2.
The top floor of the building is more susceptible to cracks caused by thermal expansion and contraction
.