Nowadays, there are more and more shear walls, so how to solve the shear wall painting hollow?

There are these ways to solve the hollowing of shear wall stucco: 1. The thickness of putty powder should not be too thick every time; 2. Do not open the window or blow with high-power electrical appliances at the interval between putty powders; 3. Wait until it is dry before going on a second time.

First of all, we should check that the surface of the concrete is smooth and lead to poor adhesion, secondly, to see whether there is a release agent on the concrete, and finally to see the position of the concrete stubble on the back wall surface, we should polish the smooth concrete before painting, and then the wall can be sprayed, and finally the stubble position should be hung with steel mesh.

It can be easily sanded for concrete walls. Simple sanding is the application of a visible barrier agent to the concrete wall. This is because this layer of release agent will seriously affect the adhesion of the plastering layer to the concrete surface.

There is also the hairspraying treatment of the wall. The so-called spraying treatment means that we must make some fixing points on the concrete wall, and the function of these fixing points is to strengthen the combination of cement mortar and water-concrete wall. The most common method is to spray your hair.

and other repair methods.

There may be several reasons for the partial hollowing of the plastering mortar shear wall:

Problems with the quality of building materials.

In the process of construction of Qingsui, if the quality of the building materials used is not good, such as uneven bricks, unreasonable cement mortar ratio, etc., it will lead to the plastering mortar and the base layer is not tightly combined, resulting in local hollowing.

Improper construction workmanship.

Improper construction technology is also a common cause of local hollowing of plastering mortar, such as insufficient stirring when applying mortar, uneven application thickness, unreasonable application time interval, not complete compaction, etc.

Ambient temperature and humidity issues.

When the ambient temperature is too high or the air humidity is too high, the drying speed of the plastering mortar will become slow, resulting in the internal air can not be released, and the local hollowing phenomenon will occur.

Duration issues. When the construction period is tight and the schedule requirements are high, the construction personnel may take the way to speed up the construction, resulting in some details not being processed in place, which causes the problem of local hollowing.

In order to avoid the problem of partial hollowing of the plastering mortar shear wall, it is necessary to carry out sufficient material screening, quality inspection and inspection and construction plan arrangement before construction. At the same time, in the construction process, it is necessary to pay attention to grasp the humidity, temperature, compaction and other factors to ensure that the plastering mortar is firmly combined with the base layer, so as to improve the overall strength and stability of the wall.

One is cracked but not hollow, and the other is both cracked and hollow. For the treatment of the crack fine lines of the former problem, a layer of vitrified fiber mesh cloth can be pasted with glue at the crack when the putty is batched in the next process, and then the batch putty construction can be carried out.

1.The wall is not watered thoroughly when plastering, and the mortar shrinks too quickly after combining with the wall and cracks!

2.The ratio of cement mortar is unqualified, perhaps because the amount of lime is too much and the amount of cement is too much, because if the concentration of these two auxiliary materials and sand is too high, the shrinkage will be too large, and cracks will occur!

If the roof cracks are severe and need to be repaired, the only way to repair them is to hire a professional leak repairer. 3. If there is a large area of water leakage or multiple leakage points on the roof, the professional staff should check whether there are cracks, deal with the water leakage cracks first, and lay the waterproof membrane on the entire roof, if you want to strengthen the waterproof effect, you can also lay the heat insulation board, because the height of the heat insulation board is more than 20 cm, which can achieve the dual effect of protecting the waterproof layer and heat insulation.

Around the tile: hollow out the surrounding of the tile, and then use the perfusion tool to carry out pure cement paste or tile binder pouring, pour some water before pouring for lubrication, so that just grouting in, the moisture of the slurry will be absorbed by the wall and the tile, and the remaining dry grout will block the entrance, causing difficulties for continued pouring. If the hollow drum position is in the upper part of the tile, you can tap the tile at the same time as pouring to make the grout fill the vacant part more fully, if the hollow drum part is in the lower part of the tile, you can not beat the tile, and the grout will flow out when you knock it.

If there is a problem with only a few bricks, you can consider finding a professional brick laying master to reinforce, if there is a large area of hollowing, the best way to deal with it is to remove the problem of the wall tiles and the vicinity, and re-pave the wall with structural glue under treatment.

It is to replace the tiles of the hollow drum, if the wall tiles appear in a large area of hollow drums, although the first method can be handled, but the amount of work is huge, so frog suggests replacing the tiles.

It can be achieved by reducing the shrinkage difference between the mortar layer and the base layer, or by increasing the bond strength between the mortar layer and the base layer. Reducing the shrinkage difference can be achieved by reducing the shrinkage rate of the mortar itself, adding chemical auxiliary shrinkage reducer to the mortar, selecting the construction season, reducing the wall placement time, and layering the mortar. Much has been written in this type of literature.

However, due to the high cost and the ever-changing construction environment and construction conditions, there are many problems in the actual implementation of the project. It is more practical and more common to increase the bonding strength of the shear wall and disperse the shrinkage stress of the mortar.

1.You can choose a spraying machine for mortar spraying2The shear wall can be drilled with a sharp weapon, and the uneven surface is conducive to the combination of mortar and wall 3Mix the wall with construction glue and cement to beat and brush, so that the plastering binding force will be stronger.

I think that you can directly find a decoration company and redecorate the wall, so as to solve the problem of hollowing.

Causes of formation.

1.Non-standard: The plastering of the base layer of the wall is not treated as required or the garbage of the base layer is not cleaned up. Before tile paving, check whether the plastering of the wall base meets the requirements, and the wall base debris, dust and must be cleaned; When paving, the back of the tile is covered with cement mixed mortar or 107 cement slurry and taps the tile with a hammer handle or soft hammer to make the cement grout crowd the back of the tile, and then press hard to make the tile firmly combined with the wall base.

2.Not soaked in water Before paving, it was not soaked in water or soaked enough. Tiles (especially glazed tiles) should be soaked in water for more than 2 hours before paving, so that the tiles can fully absorb water, and then take out the shade to dry or wipe the clear water.

If the brick is not saturated with water, it will absorb the water in the mortar prematurely, resulting in the mortar shrinkage and hollowing, and it will also affect the strength of the paste.

3.Not full: When the tile is paved, the mortar is not full or the tile is not gently beaten and squeezed compactly. It's a situation where it's either cutting corners or cutting corners:

To save cement mortar, or to save time sloppy. There is another situation that mostly occurs when contracting labor and materials, that is, the quality of the tiles is too poor, and I am afraid that the tiles will be broken when tamping.

4.Precautions When the back of the tile is full of mortar, it should be plastered into a hypotenuse on the four periphery of the tile, leaving some gaps in the middle, so that when pressing and tapping the tile, it will not cause the mortar to overflow everywhere, but also make the mortar full, and the tile and the wall are firmly combined. After the mortar is solidified after the tile paving, you can use a small hammer to tap the surface of the tile to check whether the tile is hollow.

If you're checking for floor tile hollows, there's an even better trick: grab a nail and sprinkle it from one corner of the room as horizontally as possible to the other! Glance.

5.Resolution.

The common way to repair the hollow drum is to shovel the sand ash, refill it with quick ash, and re-batch the putty after drying. However, some hollow drums, due to the location and other reasons, it is difficult to chisel out, such as the hollow drum between the concrete protective layer and the base layer is more difficult, some more expensive stones, the hollow drum between the ceramic tile and the base layer, and the stone damage economic loss is greater after chiseling. This type of hollowing can be solved by the method of perfusion repair.

The AB resin grouting repair of some engineering crack treatment centers can inject high-strength adhesive into the hollow drum, and the empty position can be filled with full adhesion and compression resistance. This kind of grouting repair hollow drum method time is fast, does not damage the base, by its underground garage, plant and other sites, the construction process does not affect the use of the owner, is a more convenient way.

About hollow drums. The hollow drum is caused by the presence of air in the original masonry and the powder layer, when detecting, the plastering layer and the screed layer are knocked with a hollow drum hammer or hard object to make a knock sound for the hollow drum The "hollow drum" in the quality of the house generally refers to the hollowing phenomenon between the ground, wall, ceiling decoration layer (plastering or pasting surface bricks) and the structural layer (concrete or brick wall) due to pasting and unstable combination, commonly known as "two layers of skin."

Fresh! Strange! The shear wall is not dense, there may be holes, and even inner holes, but I haven't seen or heard of "hollow drums"! The so-called hollow drum is the inner surface of the empty expansion and the outer bulge. Nothing can be answered for what reason, it is even fresher!

The vibration is not compact; concrete segregation; The steel bar is too dense and the concrete cannot be compacted;

The reinforcement is too dense and the vibration is not sufficient.

1. Remove the old masonry mortar before plastering.

2. Wet the wall with water first, and the wetness is best to suck water into the brick 5-10mm, but there is no free water on the surface.

3. The plastering must be divided into two degrees (times), and the first degree of plastering must be touched with wood after a period of time (before the initial setting), for the reasons of a, so that the mortar and the wall are fully in contact with the bonding b, to ensure that the surface is not cracked c, to ensure the flatness. After touching it, use a long wooden strip to scrape it rough, so that the first layer and the second layer have a good joint.

4. The second plastering must also be pumped with wood as soon as the first time, and the iron sheet should be used to clean the light after the first time, 5. Maintenance, especially outdoor plastering, must be sprayed with a sprayer after the final setting.