With the time of use in the floor pits and cracks form, and sometimes even cardinal changes are required at all for the convenience of movement around the apartment or at home. 
Scheme of concrete floor. It turns out that it is quite possible to repair the concrete floor with one's own hands, the main thing is to determine exactly the degree of complexity of the forthcoming works. The importance of this moment is determined by the need to purchase materials and learn the sequence of actions in a given situation.
Dusty floor in the apartment
Entering a new house or apartment, a personoften already has some kind of floor, say, concrete. But modern builders rarely care that the coating, that is, its last layer, is made of special impregnation:
- polymer;
- inorganic.
These materials can increase the strength of the concrete floor several times, if they are selected correctly. Therefore, the first repair may eventually result in the processing of the concrete floor from its dustiness. 
Table of polymer impregnations. Existing impregnations in fact assume a certain porosity of the concrete. It is laid at the design stage. Taking up the business of pouring floors from the zero stage, you can achieve the strength of the surface no worse than on the runway. But considering the situation with the repair, it should be noted that it is also possible to choose polymer or inorganic impregnation by trial and error. The principle of action of polymeric materials is reduced to two possible physical processes:
- sealing of the surface layer due to polymerization;
- modified neoplasm of concrete.
The latter is achieved with the entry of concrete intochemical reaction with active elements of chemical impregnation. Given that the floors are initially ground, after polymerization and possible refinement using a diamond film, the resulting surface will be as glossy. If you add an acrylic dye, it can become the desired color. Back to contents</a>
Easy floor repair
When a person is sure that a floor screed is not required, cosmetic repairs can be enough. This means:
- sealing small potholes and pits;
- elimination of minor cracks;
- removal of roughness on the surface.
Stepwise repair of large cracks on the screed. Repair begins with cleaning the concrete floor from dust, dirt, foreign objects. The next step is the cleaning of the roughness, which can be performed using a grinding machine. Before preparing the mortar, in order to repair cracks and fissures of existing concrete floors, it is necessary to clear them to the logical end. That is, so that when you touch their edges were strong enough and did not fall off. This can be done with a jigsaw. Using a working vacuum cleaner, collect accumulated debris. Further, a concrete composition is made, into which sand, water, cement enters. Determine the proportions necessary based on what kind of composition is already available for the finished concrete floor. If it is difficult to do by yourself, it is better to consult a professional. All the ingredients are thoroughly mixed, poured into the right places. This can be done in various ways, for example, using a construction syringe, then the solution will accurately fill the entire required volume. They give the composition to freeze, once again pass the surface of the grinding machine. When performing minor repairs, pay attention to the following points:
- Special hydrostable impurities are added to the bathroom solution;
- The temperature difference on the balcony: the floor must be stable to them;
- the kitchen should have a heat-resistant surface.
Therefore, we must carefully study the compositionof the mixture to be purchased for the solution. It is necessary to look at the conditions for pouring floors by yourself including. Some experts believe that it is possible and necessary to add PVA glue in small quantities to the repair mortar. Back to contents</a>
Leveling and priming under the screed
Scheme of using a self-leveling mixture. Sometimes the floor really needs major repairs. Then it is necessary to carry out a new coupler. This is a very laborious work, as it will be necessary, except for the performance of a high-quality fill, to ensure leveling of the concrete floor level. You will have to start by cleaning the surface of debris and dust, you can use water. After that it will be possible to assess the current state of the concrete surface. If necessary, it must be cleaned of detached concrete. In order to repair the concrete floor was of sufficient quality, it is convenient to use the construction hydro level. To work with him will need two people. The principle of its use is based on the fact that under the influence of atmospheric pressure the water line in two communicating flasks will always show the horizon. Moving them through the sections of the room, you can calculate a relatively ideal horizontal plane, which will later become the surface of concrete floors. During the leveling of the floor, a zero level is set, from which the distance is set, which will determine the thickness of the pouring not less than 3 cm. To increase the ability of adhesion of concrete floors with the solution to be poured, a primer is produced. This repair phase is performed solely in order to avoid spreading of concrete, which very often happens with certain properties of the concrete mix. Priming is necessary in the case of a large takeoff in the thickness of the floor. It will promote uniform drying of the solution along the entire perimeter. Back to contents</a> Setting beacons 
The scheme of installation of beacons on the floor. To equalize the filling of concrete floors, it is necessary to install metal slats, prepare small wooden blocks in advance, the guides will be fastened to them. Need self-tapping and drill.
- the maximum distance between the beacons is 1.2 m;
- the first is set through the highest point of the surface;
- T- or U-shaped billets are used.
Observe the two directions of the rails: each of them must be installed horizontally, and they must all be parallel to each other. In order not to become a waste of time, you must:
- To install wooden blocks along the determined lines, at the appropriate height;
- The prepared solution is placed along the same lines with small bumps;
- Put a metal frame on the uneven bars and mortar, removing the excess;
- attach the screws to the floor bars and slats.
Be sure to monitor the place where thethe highest point, acting on the principle of "measure 7 times, and cut one". Sometimes there is a need to take brusochki of different sizes in height or to put improvised construction debris, which is undesirable, because during pouring it can imperceptibly come off, which in the future will give rise to a crack or pore. Back to contents</a>
Pouring and finishing work
To complete the repair of concrete floors,prepare a grout of proper quality. Following the instructions recommended by the manufacturer of cement or cement mix, in a large container with a construction mixer make a kneading solution for the concrete floor. Some firms offer electronic calculation of the required proportions, as well as the volume of the finished solution. The mixer can be made from a drill provided with a suitable nozzle. Apparently, such repairs will require the owner not only to have wits and ingenuity, but also to own a rather large arsenal of household appliances, appliances and improvised tools. Some of them can be taken from friends or borrowed from construction teams. But the fact that the solution tank should be large enough. The finished solution is spread along the beacons, between them, and is constantly trimmed with a strip, removing the excess, lightly pressing the solution, extending the tool to itself. Slowly, moving around the perimeter of the room. When the entire floor is flooded with mortar, for the strength of future concrete floors work should be suspended, allow the mixture to dry and freeze. To complete the repair, you can grind the resulting irregularities, you can use the recommendations for dust removal of the floors. But at home, they are increasingly using such additional coatings as:
- linoleum;
- parquet;
- ceramic tile.
The story would not be complete enough withoutmention of self-leveling bulk form of concrete floor. It refers to the finishing works, is poured on the already prepared surface and does not require grinding on hardening. Under the condition of applying such a fill, it is recommended to go through the priming step twice, and make the layer thickness at least 5 cm.
