Seal cracks in concrete: methods. cement-lime mixture.

Concrete pavements have long been popular among consumers due to their durability. They are used not only for the manufacture of floors in the production workshops or as a roadbed, but also in private housing construction. This material will explain how the incorporation of cracks in concrete occurs, which is often a problem of coating.

Their appearance is associated with:

• low tensile strength of the material when the structure is compressed and shrunk when the structure dries;
• mechanical and chemical damage to the coating;
• temperature drop;
• corrosion of reinforcement.

Tip: it is necessary to repair any cracks as soon as possible, regardless of the reasons for their occurrence. This is one of the main tasks that can prevent further destruction of the structure.

Repair options

At home, use:

1. Cement liquid "dough" - for cracks whose dimensions do not exceed 3 mm.
2. Compositions with epoxy resin.
3. Special repair mixture.

Tip: if the dimensions of the cracks exceed 3 mm, use a special mixture (Portland cement 1 part, water and sand - 3 parts each, and also PVA glue).

There is also such a concept - self-healing of cracks, which implies their spontaneous filling. Usually the method works only for very small defects with a size of no more than 0.1 mm.

Technology

Below is a guide that will help you understand the entire cycle of work.

Pre-prepare the tools and materials:

• hammer;
• zubilo;
• cement;
• sand;
• PVA glue;
• water;
• brush;
• putty knife;
• mittens;
• paint brush;
• trowel;
• wooden rail;
• pieces of wire;
• metal treadmill;
• grinder.

Tip: if you forgot to leave the technological channels in the foundation, floor or walls, diamond drilling of holes in concrete with the desired diameter will help you.

Reconstruction methods

Cement-lime mixture

Now you will learn how and how to seal cracks in the concrete floor and not to be mistaken when using the composition:

1. Conduct preliminary workplace training. To do this, check the crack itself and the area next to it, so that there are no chips on it, which in the future may become shallow pits.
2. Before closing the cracks in the concrete, take a chisel and a hammer and go through the entire length of the defect to embroider it.

Tip: in case of detection of hidden chips should remove this piece of concrete.

1. Clean the surface with water, a brush and detergent.. To remove dust from cracks, you can use a vacuum cleaner. Remove any excess water with a sponge.
2. Take a spatula and deepen the defect to about 5 mm, then the cement-lime mortar will be able to fill the entire space of cracks and will hold firmly and for a long time..

1. Prepare the solution, taking 3 parts of sand, 1 part of cement and add PVA glue to the mixture. Note that the solution should not be thick or liquid.
2. Take the trowel and pour the mixture into the crack, then moisten it with water.

Tip: if you use a polymer composition, it is not necessary to moisten with water.

If the cracks in the floor are of medium size and the reinforcement is visible from them, they must be cleaned and treated with a solution that protects the metal from corrosion. You can also put in the grooves pieces of wire of the same length and O4 mm.

1. Brush the adhesive composition and distribute it over any irregularities.. The thickness of the layer should be about 3 mm.
2. Fill them with a solution, without waiting for the composition to dry.. Try to do the filling gradually, then the solution will fall more tightly.
3. Using a wooden batten, level the surface by removing an extra layer of mixture from it..

Tip: if the defect is very deep and large, apply the solution in several layers, wetting each with a small amount of water.

Laying laminate or paint concrete surface can be literally after 24 hours, but you should not be in a hurry with gluing ceramic tiles.

Be sure to remember the following rule - the fill layer should be above the floor level, the solution after drying will shrink. Further work is carried out with a concrete grinder.

Tip: to expand the crack in the floor, which has large sizes, you will help cutting the concrete with diamond circles, after which the process is similar to working with defects of medium size.

Applying a flexible sealant

It is also possible to seal a crack in the concrete floor with the help of an elastic sealant, among the variety of which silicone is most widely used. It is used to repair defects of various sizes.

The process is no different from working with the CIS. You will also need to clean the cracks or make additional grooves.

Tip: when applying sealant must be moistened surface.

Its main advantage is the drying speed, which is much faster than that of the cement-lime mortar. But the price of this method will also be higher.

Conclusion

Сегодня вы узнали, чем заделать трещины в бетоне лучше и быстрее всего, а также то, что ремонт необходимо начинать как можно скорее, иначе может произойти дальнейшее разрушение участка поверхности. Это увеличит стоимость процесса в разы (см.также статью «Заливка бетона зимой: недостатки и преимущества»).

In this article, two main methods were proposed for dealing with defects in concrete floors and walls.

The video in this article will help you find additional information on this topic.