What is the reason that there are a lot of bubbles on the putty scraping on the wall? How to fix it?

There are a lot of bubbles in the wall and ceiling scraping putty powderIn the case of interior decoration, the lowest level of architectural paint is not done, and there are slight cracks on the wall. In the case of putty powder mixing, the mixing time is short and uneven, and there are smaller small breads, which can not be seen with both eyes, and can be seen after scraping on the wall to dry. Before scraping putty powder on the wall and ceiling, it is very likely that there is no brush "wall solid", the wall is fixed without moving glue, and there is no trowel inside the raw material "caulking gypsum", in the mixed mortar wall, the top of the ceiling can be directly scraped flat putty powder, due to the dryness of the wall and ceiling, the putty powder is not easy to bond on the wall, even if it is scraped flat on the wall and ceiling, the water in the putty powder is quickly digested and absorbed, which is also one of the factors that have bubbles on the wall and ceiling.

Shovel off the wall with bubble putty, the wall scrape putty is very easy, it is difficult to shovel off the putty with bubbles, because the putty scrapes on the wall is particularly thin, it is as thick as A4 paper, and it is especially difficult to shovel off, and it is also a more time-consuming engineering project. In the whole process of shoveling, only a small piece is shoveled, and it is even more difficult to shovel clean and tidy, and the residual putty endangers the quality of interior decoration behind. I would like to ask what to do if there are a lot of bubbles on the wall and ceiling scraped putty?

The above content is analyzed and explained in detail. There are a lot of bubbles in the wall and ceiling scraping putty, carry out shoveling off the solution, after shoveling neatly, brush the bottom layer of architectural paint, smooth the caulking plaster, mix the moisture-resistant putty powder 2 times, make sure to stir evenly, and scrape the moisture-resistant putty powder three times again.

A "scraper" who meets the standard must have a solution to the problem, and the first step in this bubble problem is to use a method to deal with it. Brother Yu encountered such a situation and solved it like this: if the first putty is scraped back to the hair, we are not in a hurry to solve it, let it dry for a while and wait for it to make up for it when it wants to do it, and to adjust the amplitude and thickness need to be even.

After pressing a few more times, the bubbles will slowly fade, the first time you don't need to scrape so thick, the second time you follow thinly, the efficiency of scraping can not be too fast, just carefully grasp the way to solve the bubble problem after scraping three or two times.

The application of fibers with high viscosity and very easy air extraction has a high overall air supply, and the bottom vapor is closed and cannot remove air bubbles. In addition, there are some poor quality lime calcium with a lot of quicklime powder, which produces a strong chemical reaction after releasing water, causing a lot of vapor and causing foaming. Generally, after stirring the putty evenly, let it stand for 10 minutes to let the various ingredients moisten and melt sufficiently, and then mix it again with an electric mixer on the back wall.

During the construction of the project, the wall needs to be constantly scraped, and the batch scraping must not be too thick. Pay attention to the temperature during the construction of the project, the relative humidity of the air is more than 75%, and the moisture content of the wall is more than 10% to prevent the construction of the project.

The reason for the blistering of putty, one of them, is that the base is too rough, there are fine pores, such as the cement mortar surface layer, the surface of the wood have some pinholes, if the putty is scraped, these holes are not fully filled, heated and expanded, and the coating film will form bubbles.

Generally, when scraping putty for the first time, directly use a shovel blade to crush all the small bubbles, and then scrape putty in batches to fill the holes, which is basically solved after grinding.

Note that the putty is stirred evenly, and it can be put on the wall after standing for about 10 minutes, and the standing time should not be too long, and the putty scraped should not be too thick, less than 2mm is the best. ）

Second, it may be caused by the dry climate, which causes the wall to be too dry, because the putty is added with something called hydroxypropyl methylcellulose, which has good film-forming, when you wipe the putty on the wall, because the wall is too dry, you need to absorb a lot of water. While the wall absorbs water, it will release gas to the outside world, and the putty will form a film, and the gas will not come out, so bubbles will be formed.

It is recommended to spray some water on the wall to moisten it, and then carry out the next step of construction after the wall has no open water, which can reduce the appearance of some bubbles.

It may be that the construction personnel are inexperienced, or it may be concrete, and the ceiling has a lot of bubble eyes. When painting the wall, you can brush the interface agent first, and then go through it again with plaster, which can solve the problem of air bubbles.

Because when the developer is building a house, the wall is not leveled, and it may be that some inferior putty is used, and the level of the master is not good, you can use a shovel to shovel off the blistered part, and then re-level the wall, and repaint.

The wall is not cleaned, and the putty material is dry, so add some water and stir it to try.

The reason for the blistering and falling off of the scraping putty is as follows: the bond is not firm. The cracking, peeling, and peeling of putty are mainly caused by the poor bonding between putty and the base layer.

If the base layer is not cleaned up or the treatment method is improper, the template release agent, oil co, inorganic acid and organic acid on the base layer are not completely removed, the caustic alkali aqueous solution (used to remove the wall oil stain) is not brushed, the binder is not applied or the putty formula emulsion is improperly mixed, the result will reduce the bonding strength of the putty and the base layer. The test data proves that the base layer is well treated, and the bond strength can generally be increased by 5-9 kg square centimeters, and the emulsion can improve the bonding performance of the mortar and the base layer, and the general bond strength can be increased by 4-7 kg square centimeters. The putty coating is too thick.

The thickness of the putty coating is related to the choice of material and ratio. For example, scraping large white putty, in order to facilitate the operation, the talcum powder is added more, which improves the lubrication performance of the putty, and generally does not produce excessive coating; However, if starting from the putty filling effect, the amount of large white powder increases, due to the coarse particles of large white powder, the putty has poor lubrication performance, and it is not easy to operate, and the coating may be too thick. It can be seen that the key to preventing the coating from being too thick is to properly adjust the content of large white powder and talc.

The following is the method of scraping putty: scraping putty skills are fast and flat, first put an appropriate amount of water in the bucket, generally no more than one-third of the barrel volume, and then pour in the appropriate amount of putty powder, install the electric drill on the mixing head, energize and stir, stir until the sauce can be scraped before scraping, use a broom and putty knife to clean the wall, when scraping, you must first scrape the top and the upper part of the wall, and then scrape the lower part of the wallWhen scraping the wall, try to scrape left and right, not up and down.

If you have any questions, please continue to ask questions.

The wall is not cleaned, the putty material is dry, add some water and stir it to try it, and the thickness of the putty is uneven!

It should be that the putty was not hung up properly when it was scraped.

The reason why the walls are scraped putty with bubbles is made of putty powder.

quality problems.

Putty powder is mainly made of talcum powder.

Mixed with glue and other materials, since it is a mixture, there will be quality problems if the ratio is unreasonable, and various problems will occur after the putty powder is scraped with substandard quality, such as common foaming, powdering, peeling, falling off and other problems.

Problems caused by climatic factors.

Putty scraped in summer and winter is more likely to cause blistering problems than putty scraped in spring and autumn. Too high or too cold is not suitable for putty.

It is best to scrape putty in the season when the spring flowers are blooming and the autumn is crisp.

Blistering caused by wall problems.

Although putty powder is suitable for all kinds of walls, the quality of the scraping effect is also closely related to the wall! For example, if the wall is smooth and pollution-free, there will be no excessive blistering when scraping putty. If the wall is rough and uneven or there are cracks and sanding, the speed of batch scraping when the putty batch scrapes the wall is relatively fast, resulting in the air in the hole is not discharged, and small bubbles will be formed.

If the wall is too dry, the water absorption rate of the wall will be too high after the putty batch is scraped off, which will also lead to an increase in bubbles.

Other problems that may arise with wall scraping putty are yellowing of putty.

After the putty is completed, it will soon be partially or completely yellow. Causes:

1. The alkalinity of the base layer of the wall is high, and the putty is chemically changed by the alkalinity after scraping the putty.

Causes the putty to appear yellowing.

2. After the putty is scraped, other constructions are carried out before the putty is completely dry, such as furniture painting, paving the ground, etc., which produces volatility during the construction process.

The organic gas reacts with the undried putty, causing the putty to turn yellow.

Solution: 1. For the wall with high alkalinity of the base layer, oxalic acid should be applied.

The dilute solution is rolled on the wall for acid and alkali neutralization, and after drying, the wall is rolled twice, which can effectively prevent the putty from turning yellow due to alkali.

2. After the putty is scraped, wait until it is completely dry before other construction, such as the construction must be carried out in a hurry, the use of decoration materials containing organic volatile gases should be avoided, which can effectively avoid the putty from reacting and turning yellow.

Putty cracking After putty construction for a period of time, the surface cracks. Causes:

1. The construction of the base layer is not completely dry, and the moisture content of the base layer is required for construction.

2. The bottom layer of putty is not completely dried, just over the surface, the surface layer is dried first, and the inner layer is still in the process of drying, resulting in different degrees of drying between layers and easy to crack.

3. When the base layer is treated, the joints and leveling materials are not completely dried, and the interior wall putty with strong hardness is applied on it, which is easy to cause cracking.

4. The construction is too thick, the internal drying is slow, and the surface drying speed is faster, which is also easy to cause cracking.

Solution: 1. The putty that has cracked needs to be removed, if the crack is not too large, flexible putty can also be used for the first construction, and then the construction is carried out according to the standard construction method. 2. Each construction should not be too thick, and the front putty should be thoroughly dried before the rear scraping.

There are a lot of bubbles after scraping putty on the wall, there are two main reasons, the first is that the wall is not cleaned before scraping the putty, the wall contains impurities resulting in bubbles, and on the other hand, the scraping of putty is not uniform enough to cause bubbles.

When the construction personnel scrape the putty on the base layer of the wall, if the putty layer is too thick, more than 2 mm, it will cause the air in the putty hole to not be squeezed out, which will naturally lead to the foaming of the putty powder on the wall.

The main reason is that when stirring the putty powder, it is not stirred evenly at all, and there is a lot of air mixed in it.