Grinding concrete floor with your own hands

Before applying the finish coating, it is necessary to make sure that the surface of the concrete is flat. Before applying for impregnation, exhausting, treating varnishes or paints, it is customary to grind the concrete floor. A competent approach is able to provide reliable adhesion of concrete with a polymer coating. Adhering to certain stages, you can easily grind the concrete floor yourself.

Content:

The purpose of the floor is grinded

The concrete floors that have been polished using modern technologies over the past couple of decades have confidently displace the usual floor coverings. High -quality grinding concrete floor makes it spectacular and extremely practical, it does not require significant costs for caring for it, there is no need to restore restoration, appropriate within any interior design, is suitable for use at open street facilities; Because it is waterproof, resistant to aggressive chemical influences, intensive traffic of visitors and the movement of heavy equipment.

Concrete grinded floors were widely used in stores and supermarkets, office buildings, residential premises, warehouses and hangars, business centers, cafes and restaurants, hotels, theaters, salons, educational institutions and medical institutions. At home, concrete ones make sites in front of buildings in the yard, floors in garages, cellars, summer cottages and outbuildings.

Grinding the concrete floor is a type of construction processing, which is necessary to remove the old coating, leveling the base of the concrete floor and gypsum screed before applying strengthening impregnations, protective varnishes, decorative thin -layer paints and bulk polymer coatings. The preliminary grinding of the concrete floor is carried out on the third fifth day after the casting of the base of the concrete floor. Finally, grinding is carried out only after the final hardening of the surface of the flooring.

If the concrete is new, then it requires the elimination of lime milk, which is formed during filling when the solution is stratified. If it is old, its upper and most damaged layer should be removed. Also, grinding helps to eliminate any pollution, to align the deformed areas that have cracks, chips, bumps, ripples, zabins and an influx of a local nature. After grinding in both cases, the upper layer becomes fresh and with increased adhesion.

Also, grinding of the concrete floor is used in polishing or applying any coating that requires the ideal state of the base. When installing bulk floors, preparatory work is carried out, which include grinding. In this case, the upper fragile layer is removed, irregularities and surface defects are eliminated. The grinding process is also necessary to restore a worn concrete floor, when the upper destroyed layer is removed. If you do not grind the floor, it will lose its strength.

In addition, unnecessary concrete will absorb moisture. At minus temperature, the water crystallizes and increases in volume, and this can destroy the material, which is especially bad for the first floors. Remember that the grinding does not adjust the horizontal direction of the floor, this should be done even when filling. She cannot cope with the wave drops of concrete fill or plates, because the grinding apparatus moves close along the surface, repeating exactly its profile. This can only be avoided in the process of reloading the floor.

Types of grinding concrete

Grinding concrete can be carried out in a wet and dry way, the price of grinding the concrete floor depends on it, but the equipment is always used the same. This can be explained by the fact that the grinding tool should cope with concrete and stone surfaces.

Wet concrete grinding is used mainly when grinding the floor with mosaic or coating with marble chips. A similar type of grinding requires the use of abrasive segments in the work, as a result of which an almost perfect floor surface is formed, which is no different from the polished in appearance.

For a concrete surface, it is better to use a dry method of grinding. It is worth noting that dry grinding requires much more time than wet. During it, a lot of dust rises into the air, but this is better than a wet cement sludge that greatly covers his eyes. Therefore, the visibility of the work is the best and the master can immediately correct his mistakes. To remove dust, you can use industrial vacuum cleaners. During wet grinding, water supply is used.

Equipment and tools for grinding

Tools for grinding can be found in any construction store. Most manufacturers are America and Europe. As for domestic instruments, there are no worthy options on the market. Today, special grinding machines and ordinary home tools are produced.

Needless to say, professional equipment is better? It has a system of planetary mechanism - a large disk with fixed auxiliary wheels that move in one direction and on which diamond nozzles are fixed. The wheels rotate in the opposite direction. Thanks to this complex diamond movement system, the concrete floor is very even and smooth.

Professional grinding machines for the concrete floor are endowed with adjustable speed, they can also adjust the supply of water for wet work, collect dust and sludge. The heavier the weight of the machine, the better the grinding will be. The price of such models is very high, but there are inexpensive options.

You can also use the grinder. This will complicate your work, but for home repairs it makes no sense to buy an expensive car. Moreover, grinding with a grinder is well performed in hard -to -reach places where a large machine cannot pass. If you want to polish the concrete with a grinder, you will need two nozzles, an abrasive disk or a diamond bowl.

The larger the circle, the greater the load can carry the Bulgarian. This tool should be treated very carefully, since the circle can jump off a person or another item. As for polishing, it is designed to create a flat and beautiful surface. The polishing machine is quite compact and convenient to use.

Material for grinding

If you want to get a quality result, do not rush events. Absolutely any concrete can be grinded, the main thing is the result, which depends on the brand, the age of the coating and fillers. The layer can be tightened up to three centimeters, the presence of tubercles and holes is also allowed, but the difference in the difference between them should not exceed five millimeters.

To choose a material for a concrete screed, it is necessary to take into account the purpose of the room, which affects the cost of grinding concrete floors. For a production workshop, garage, a small warehouse and squares on the street, concrete with a marking from M150 to M300 is suitable. This material is very reliable and endowed with good qualities for future grinding.

If the floor should be more durable, you can use the material with the marking more M300. The most optimal filler of concrete screed for grinding is crushed stone of small fractions of magmatic and metamorphic rocks. If in the future you want to carry out polishing work, you can use gravel of granite or marble crumbs, which will create an original surface.

Small fractions are best for grinding. Material with marble chips is very easily processed, and sedimentary gravel and granite are the most difficult. To carry out grinding work, it is undesirable to use the greater density of the filler, but too low density can reduce the quality of the floor.

Preliminary stage

Take carefully to the preliminary stage. During the preparatory work, the listed points should be paid attention to:

If any coatings were applied to the old concrete surface, try to determine the degree of complexity of getting rid of them. After removing the old layer, deep scratches or furrows may form. Usually they are removed by a long grinding method, so financial costs can increase.
Be sure to check the evenness of the plane. This can be done using the three -meter ruler. If you find bugrs, potholes or pit, you will have to increase the number of diamonds.
Pay attention to the deformation and shrink seams and carefully inspect the cracks. If they are, it is necessary to carry out mandatory reckoning work and additional grinding of problem areas.
To determine the degree of strength of the concrete screed and the underlying layer, it is necessary to tap the entire area. If you find a site with a lack of strength, you will have to shift the floor.
Check the voltage, because this is a very important stage. For working with equipment, a stable operating voltage and current strength is required.
According to construction standards, the presence of seams in concrete, as well as cracks between skirting boards and the surface of the coating, must not be allowed.
To check the stiffness of the floor, it is necessary to treat a small section of a grinding machine.

Preparation of concrete floor

Before polishing the concrete floor, you should make sure that there is no reinforcement or reinforcing metal mesh in its upper layer, which can damage the planetary mechanism of the grinding machine. If there is still metal in the concrete floor, then cut it by hand with a grinder manually.

First you need to remove all the irregularities on the new concrete surface and destroy the old coating. This can be done by milling of fragistral cleaning. You can also use a special grinding tool. Experienced experts advise using diamond boards with a granularity of 25-30. They help to eliminate excess cement from the surface of concrete. If you need to polish only the first layer, you can use a disk with a granularity of 40.

Next, it is necessary to eliminate various defects - cracks, potholes, shrinkage seams, etc. To do this, you can use epoxy mastic, which perfectly fills unevenness. It needs to be applied in such a way that a grinding machine can easily go through the flaws and not cling. Soft concrete planes are polished better than hard and look more shiny. But they will need more diamond nozzles.

Grinding the concrete floor

Grinding work is carried out a couple of weeks after the screed dries. During this time, the coating gains strength and is ready for further use. It is known that concrete includes gravel, granite, marble, limestone, etc. If you start grinding on a low surface, the equipment will simply tear out crushed stone with diamond cuts. Manually you cannot polish the unprepared floor.

Now you can start grinding the concrete floor with your own hands with diamond discs with a granularity of 40. It is necessary to treat the floor with a hardware - a special mixture that reacts with calcium hydrolying. As a result of this, a mineral-legging substance appears on the surface of concrete, closing the pores and making concrete much stronger and more resistant to moisture.

If you use discs with a granularity of 400 and above, you can create a very durable concrete layer that can withstand even very large loads. This stage is final and the surface does not need additional care. But if you want to achieve perfect evenness and glossy shine, you can apply polishing with granularity diamonds of 1500-3000.

After machining, you can install a skirting board and conduct surface treatment. In order for the surface to be glossy, you can use polyurethane varnishes, which are applied using special rollers and brushes immediately after grinding on a plane cleaned from dust. As a rule, the floor is varnished in several layers.

Elimination of potholes with grinding

During prolonged use, various deformations can form on the coating. Often they arise due to non-compliance with technology when laying the floor, since the correctly laid floor has very high strength. If you find a pothole or crack, you should immediately carry out repairs by grinding.

If a pothole is detected, it is necessary to carefully cut the damaged part of the floor (in the form of a rectangle) to a depth of at least twenty millimeters using a diamond disk. After that, you must take out the site yourself or use a perforator. The resulting cavity should be freed from dust using a conventional vacuum cleaner or sandblasting, and then treated with a primer and filled with a special composition for sealing with a spatula.

Next, you need to leve a site using a rail or rule. When the repair mixture freezes, you need to polish it and eliminate all the irregularities. If the damage is too deep, the mixture should be applied in layers in several stages. When a small crack is formed, you can expand it to a depth of ten centimeters using a diamond disk.

Then the site is also freed from dust, treated with a primer and filled with a repair mixture. Quartz sand is ideal as a filler. When the mixture goes, it is necessary to lay the second layer. After solidifying the repair composition, grinding is also carried out.

If the crack is too deep, a slightly different technology should be applied. You must cut a crack to a depth of at least fifty millimeters using a diamond disk. On both sides of the crack, channels are cut out to extract damaged concrete. The zone must be deepened and released from dust. Next, all of the above work are done.

Grinding concrete floors will help you eliminate small defects, smooth out irregularities and open pores. If you already know how much the grinding of a concrete floor costs, then you understand that it is better to do everything with your own hands. At the same time, observe all technological requirements for the grinding of concrete floor to ensure good wear resistance and excellent decorative indicators of the flooring. Such a floor does not require frequent repairs and is very convenient to operate.

Site search