How to prevent cracking of pouring flooring and how to prevent cracking of concrete floor

Floor often occupies an important position in modern architecture, according to the requirements of industrial production technology and industrial test, the ground must have the characteristics of wear-resistant, able to withstand frequent use, no dust, no chalking, no hollowing, environmental protection and no pollution, and used to contain raw materials, semi-finished products or finished products. Flooring experts have said that in order to control the quality of the ground well, post-construction treatment is essential. It is a relatively common phenomenon for cracks to appear in the ground after the construction of the floor, if we do not control it, over time, many small cracks will be connected into large cracks, resulting in a series of problems.

Since the floor will crack, we need to learn to control it. belowUnai flooringWe will talk about how to control floor cracks from the two aspects of elastic lines and cutting seams to ensure the quality of the ground.

The steps to control the ground crack from the two aspects of elastic line and cutting seam are as follows:

a.First, the layout of the separation joint is to set a separation joint 20mm along the axis of the building and the center line of the span, and then set a blocked quadrilateral separation joint at the position of the four corners of the structural column at a distance of 20mm.

b.Then the cutting construction is carried out, and the ground elastic line must be carried out according to the layout of the separation joint of step A, and after the elastic line, the road cutting machine is used to cut along the elastic line, and the general cutting depth is 50mm.

c.We generally use a high-pressure air pump to blow the fine seam after cutting, to clean the dust in the cutting seam, and then use a flexible sealing material to fill it flat.

Add more steel bars, lay anti-crack nets, and cut joints in time after the ground is done.

1. Grassroots construction.

The base construction has a great impact on the overall construction quality of the project, but because the base construction is carried out on the ground, it is very susceptible to other factors.

If the strength and compactness of the foundation construction are insufficient, uneven settlement and even cracking will inevitably occur in the future construction and use, which will lead to various quality problems in the project.

In view of this phenomenon, it is necessary to formulate a scientific and reasonable construction plan according to the actual situation, and meet the following conditions, the basic quality of concrete helimb soil must meet the national standards; It is necessary to control the thickness of the aggregate-free concrete cushion, and it is necessary to improve the foundation compactness of the foundation.

2. Jumping warehouse pouring construction.

During pouring and setting concrete, temperature changes have a great influence on it. When the construction worker pours a large area of concrete, there is usually no large area of condensation in the setting stage, and there will be no large cracks.

However, this is obviously inconsistent with the current construction, which requires us to pour concrete by jumping the warehouse and control its construction quality in actual work to ensure its construction quality.

3. Ground segmentation technology.

In the construction process of concrete engineering, ground segmentation technology is an important construction link, especially Chan Gaoshi is in the construction of super-large area reinforced concrete project, the application technology of ground segmentation can achieve the ideal construction effect.

After practical analysis, the concrete is usually poured 24 hours after the formwork installation is completed. At this stage, the construction crew can divide the oversized reinforced concrete project into several small unit concrete floors. This can not only ensure the normal pouring of concrete, but also avoid quality problems such as cracking in the concrete setting stage.

4. Sliding energy release layer setting technology.

Considering that both the base layer and the surface layer of the concrete are concrete, it is particularly important to alleviate the concrete crack problem caused by the energy release between the base layer and the surface in order to reduce the release of the internal stress of the concrete under external constraints.

Usually, before pouring the concrete surface layer, a layer of plastic film is laid on the base layer to achieve the purpose of reducing the sliding resistance between the base layer and the surface layer and reducing the external binding force.

6. Strengthen maintenance.

The hydration reaction of concrete requires a humid environment. Moisture curing can improve the early strength of concrete and improve crack resistance. In addition, wet curing makes full use of the "dry shrinkage and wet expansion" characteristics of concrete, reducing the probability of shrinkage cracks in the initial stage of concrete pouring.

Concrete is used more widely than you think, and on this blue planet, perhaps the only thing that can match it is water.

Because it is the basis of today's building materials, providing the foundation for the construction of houses for billions of people around the world. There is no substitute for the achievements in health care, transportation, education, and industrial energy.

Although concrete is widely used, it has a problem.

Prone to cracking. It cracked by accident, making the owner suspect that he had purchased inferior materials and built a fake floor.

In fact, Zhiwu concrete, if done properly, can be one of the most durable and long-lasting building materials. However, there are not many construction teams that can make durable, hard, and crack-resistant concrete.

The reason - to add water to the concrete too. Many. Finish.

In actual construction, in fact, there is no need to add too much water to the concrete, which can give full play to the effect of concrete, so that the concrete floor can reach the maximum hardness.

But in the actual construction, the construction master likes to add a lot of water to the cement.

Why is that? Because adding more water, it is really convenient for construction. Construction work is not simple manual work, and if it can make the work a little easier, no one can refuse.

However, this operation, although the construction becomes simpler, can be due to excess water, will reduce the strength of the concrete clump bending soil, resulting in the construction of the concrete floor service life is not long.

It doesn't take long for cracks to appear.

The most essential cause of cracks is the evaporation of water. You may wonder what the evaporation of water has to do with concrete?

In fact, it has a lot to do with it, because after the extra water is evaporated, the concrete will shrink, just like the ** on the face, after drying in winter, it will crack, and the concrete will too.

Therefore, in order to avoid such a situation, it is best to understand the amount of water used by the construction party before concrete construction and stop it in time, so that the constructed concrete ground can be more durable and durable.

Of course, if the construction has already been done and cracks appear, then another topic is a different topic.

1. Test crack width: Concrete floor cracks, first of all, you have to test with a ruler, for example, your crack width reaches 1cm. If the depth of the repaired crack is relatively deep, about 2cm, then it is possible that more material will be used at this time, and for small cracks, the repair material is relatively small.

2. Clean up the cracks: you have to find a skin water pipe first, and then connect one side to the faucet, and the other side to the inside and around the cracks to wash, so that the internal residue and floating ash can be washed clean, if necessary, then you can also use a broom to clean, the best purpose of this is to ensure that the cracks are as clean as possible.

3. Stirring: You can buy 16% standard cement pavement repair materials with water, you can take an electric drill (manual mixing without an electric drill can also be used) to mix water and Wu Chao car material evenly, note: 16% water is the best water-cement ratio of repair materials, and the amount of water you use determines the solidification speed (2 hours of fast setting), solidification strength.

4. Filling: The next step is the filling, you can take a putty shovel to mix the evenly mixed repair material coating film at the cracks, then you can coat the cracks, so as to ensure that the cracks are all poured into the cracks, and the time control is as much as possible within half an hour, because of the reason for rapid solidification, then here to remind me that the gap is too large and too long to solidify, and there are gaps inside.

5. Adhesive tape: After the completion of the previous step, in order to ensure that the repair material is smoothed with the ground, there is also a purpose to make the repaired pavement more natural, so it can be said that this step must be done, that is, after the joint, the tape is fixed on both sides of the crack, the purpose of this is to prevent the repair material from overflowing, which also has an impact on the aesthetics of the pavement.

6. Coating film again: Glue the tape, so that you don't have to be afraid of too much repair material and a lot higher than the road surface, and then apply the film evenly on both sides, so as to ensure that it is OK to be 1mm higher than the original road surface.

7. Tear off the tape: Tear off the tape after evenly expanding to both sides.

8. Trimming: At this time, you remember to fuse the part of the tape on both sides with the road surface, and then you use a putty shovel and a brush to make the road surface integrate.

Kiss is happy to answer for you: how to prevent cracking on retro floors Answer: Kiss 1, pay attention to the material and water-cement ratio The material of concrete is:

Ratio of cement, sand and water. There are various varieties of cement on the market, and the quality of cement materials is unqualified, which is the most direct factor for ground cracking. The ratio of cement sand and gravel should also be in accordance with the specified requirements, and if conditions permit, try to choose commercial concrete.

2. Construction technology In terms of construction technology, this is related to the experience of the construction personnel, especially for the ground of secondary pouring, the ground foundation needs to be cleaned and moistened before construction, and the base treatment of the ground must be tamped. At the same time, in the process of concrete pouring, insufficient vibration, or leakage vibration, over-vibration, etc., will cause concrete segregation, poor compactness, reduce the overall strength of the structure, and increase the risk of cracking. Attention needs to be raised...