DIY concrete floor repair

Of course, the reliability of the concrete floor has been tested over the years. The popularity of this version of the floor device is due to the long service life, high resistance to environmental factors and the relatively low price of the material. But, regardless of this, even such a high-quality coating requires some attention and timely repair. In order for the repair of concrete floors with your own hands to be successful, the properties of the old screed and new concrete should be coordinated.


Reasons for the destruction of the concrete floor

Even if you have laid the concrete mix correctly and cut expansion joints in the surface, over time you will still have to face the repair of the screed. Before starting restoration work, it is recommended to diagnose damage to the concrete floor and determine the causes of their occurrence. This will allow you to correctly select the technology for eliminating various defects of the concrete floor..

All the reasons for the occurrence of various defects in the concrete floor are combined into several groups:

DIY concrete floor repair

If the damage to the screed is of a local nature, then it is necessary to take measures to eliminate defects and strengthen the concrete floor with special compounds. If screed damage is widespread, then it is not enough to eliminate defects, you need to equip a new floor.

1. Mixing the solution

One of the best ways for small self-repair is to impart rheological and thixotropic properties to fresh cement slurry. In hardware stores, a wide range of all kinds of thixotropic-rheological mixtures for repairing concrete floors, made on the basis of polyurethane and epoxy resin, are offered..

However, for repairing a concrete floor in an apartment, which is in relatively stable conditions and is weakly loaded, you can prepare a thixotropic composition with your own hands. To do this, the busylate or PVA glue must be diluted three to five times with water and mixed with a cement-sand mortar on the resulting suspension in a ratio of 1: 3.

If there is a large amount of work, then it is advisable to immediately purchase a PVA putty. But PVA suspension is not suitable for repairing deep deformation cracks, you will have to buy a proprietary thixotropic primer for concrete and a repair compound.

It is impossible to mix the solution manually: the finished mass should be as “dry” as possible, that is, the suspension or water is added in a minimum amount, and it will take a very long time to pound such a viscous mixture so that it acquires the desired homogeneity. To mix a small volume of repair building materials, it is customary to use a perforator or an electric drill at low speeds with a mixer nozzle.

The principle of operation of such a nozzle is no different from the functioning of a cocktail mixer. In stores you can find a wide selection of different mixers, sometimes quite a bizarre configuration. But you can make a mixer yourself, from a flat bar that has a diameter of 8-10 millimeters and a length of half a meter, the end of which must be bent into a ring or simply folded in half.

When kneading, the tool is driven in a bucket in a circular motion, in a trough – transverse zigzag movements are performed. A bucket of water should be at hand, because the mixer must be rinsed immediately after mixing. In addition to the mixer, prepare a wide spatula for repairing the concrete floor. The rule, on the contrary, should be purchased from a factory, it is not worth saving on it.

2. Surface preparation

The main preparatory process before repairing concrete floors is as follows:

3. Removing potholes

If the technology of arranging concrete floors has been violated, and with a large mechanical load over time, potholes appear in the screed, which must be immediately eliminated in order to avoid further destruction of the coating:

4. Sealing cracks

Repair of all kinds of cracks should also be carried out immediately after you have discovered a defect so that the gap does not increase, the edges do not crumble, water and debris do not get inside, and the crack in the concrete floor does not damage the floor covering:

5. Correction of irregularities

When using concrete floors, unevenness may appear, which negatively affects the condition of the flooring and most often occurs in new houses:

6. Grouting

Expansion joints that are in the concrete floor lose their strength over time, crumble and collapse. Noticing such violations, you should immediately repair the concrete floor screed:

7. Dedusting the concrete floor

Concrete floors sometimes start to get dusty. Dustiness affects people staying in such a room. In this case, it is not enough just to carry out wet cleaning. Salvation in this situation can be a special coating or painting. For floors in a residential area or with a small load, you can make a thin coating with Elakor, Poroprime, Neomer.

Concrete floor repair technology in this case is economical and simple. The surface, free from dust and debris, is covered with a thin layer of primer, paint or varnish. Modern substances of this type penetrate deep into the surface, prevent the appearance of dust, increase frost and wear resistance, increase the resistance of the concrete screed to aggressive substances.

8. Overhaul of the floor

The above concrete floor repair methods are applicable if the damage to the screed is minor. And if the area of ​​the damaged area exceeds 30% of the total area of ​​the concrete floor, then it is advisable to completely replace the old screed. Also, this option is chosen when they want to arrange a warm floor or lay a clean floor, and the humidity test gave an unfavorable result..

The process of overhauling a concrete floor is not very difficult, but it requires strict adherence to some rules:

Thus, the procedure for repairing a concrete floor with your own hands is not as simple as it seems, and an ordinary grease with cement mortar will not be able to stop the destruction of concrete, level the floor and block the access of vapors through the concrete floor. To keep the costs of maintaining the concrete screed to a minimum, the process of repairing the concrete floor is recommended to be carried out in the event of minor defects that reduce the integrity of the entire structure..