Repair mixes for concrete: types and choice

Not a single construction field is complete without concrete. This material is highly durable, it is reliable and durable, so no replacement has yet been found for it. However, even the most resistant concrete structures are destroyed over time. And the reasons for the formation of cracks, chips and other defects can be very much. This and the influence of the environment and mechanical stress, violation of the technology of mixing the main elements of the solution, the load and the like.

After creating mixes for the reconstruction of concrete, the builders no longer need to completely replace the deformed sections. Now, thanks to special repair substances, you can save large amounts and time to complete the restoration of the initial parameters of the concrete system. With the help of restorative mixtures, the defective product gets an attractive appearance and returns its original properties.

The composition of the repair compounds is designed in such a way that the concrete base and the mixture itself securely interlock with each other. After they have completely frozen, you can not worry about the fact that the updated system will soon become unusable. High-quality repair mixtures from well-known manufacturers do not need a quick replacement, since they differ in a number of positive properties.

Among them:

• frost resistance;
• resistance to sharp drops and high temperatures;
• vapor permeability;
• long period of service;
• high adhesion level;
• antiseptic abilities;
• water repellent capabilities.

The repair mixture is used in case a large number of cracks, potholes and other defects appear on the concrete surface, which are revealed by 0.3 mm or more. In addition, almost all concrete structures are characterized by increased dust generation, this fact is also indicative of the use of the repair composition.

Concrete structures can become covered with voids, suffer from rust, they can form a variety of defects. All these moments and serve as a reason for the application of the reducing composition.

In most cases, repair mixtures are sold in the form of a powder, which must be diluted with water before use. Some manufacturers add certain components to their products to improve the properties of the concrete base.

Classify repair substances by destination:

1. for the regeneration of concrete systems that are under load, for example, supporting building structures, beams, columns;
2. for the reconstruction of concrete flooring;
3. to protect reinforced structures against rust.

In addition, there is a division into dry and molded mixtures.

Dry mixtures carry out the reconstruction of the original properties of concrete and the strengthening of solid structures.

Due to such parameters as strength and endurance in conditions of high humidity, restoration materials often perform waterproofing of concrete. Dry material is environmentally friendly, safe for human health, because it can be used for domestic purposes, for example, to restore the old type of containers for drinking water.

The latter criterion determines the division of repair mixtures into industrial and household.

Molding masses are used to fill cracks cleared of dirt and small holes in advance. They expand during casting, securely stick together with concrete, and practically do not shrink when cured. Filling the voids, the solution hermetically closes and seals the damaged area. Casting mixtures restore the horizontal plane.

The complexity of the original composition of the mixture emit:

• monocomponent - cement formulations with large and small particles;
• two-component - prepared using synthetic resins;
• multicomponent - liquid polymer repair masses.

The modern market also provides reducing compositions for concrete with limited operating conditions.

The name itself suggests that such products quickly dries and hardens. As a rule, after 30 minutes after pouring, it is possible to carry out work with the use of loading heavy equipment.

These types of mixtures very much help out when it is necessary to make repairs in the shortest possible time. For example, in factory warehouses, where different loads are constantly moving, and being idle at work due to involuntary repair will be a real disaster. If you need as quickly as possible, but at the same time to qualitatively repair the concrete structure, then high-speed mixtures are the best solution.

Shrinkage refers to deformations that appear as a result of a reduction in the amount of cement stone in a concrete solution. They are formed during the volatilization of water from the adhesive mixture, therefore, the more fluid is required for the mortar, the deeper the shrinkage will be.

A simple mortar shrinks to 5 mm, which is considered to be a fairly large number in the construction industry. Such shrinkage can cause shrinkage cracks.

This kind of repair substances was created specifically for the repair of vertical surfaces and walls that are tilted. Due to the design features does not need the use of auxiliary batten.

It can be used during the winter period at negative temperatures.

The modern market is distinguished by a wide range of different restoration compositions for concrete structures that have lost their original appearance and characteristics. They differ in composition, functionality, consumption, cost, quantity in packaging and, of course, the name of the manufacturer.

To date, the most successful in sales, and, consequently, the highest quality, according to consumers, are several manufacturers.

It is used to improve the properties of concrete products that have minor damage. The components of the dry mixes of the company are: fine quartz, polymer additives viscous, non-toxic and absolutely safe for humans. The solution removes large and deep cracks from 2 mm to 2 cm.formed on concrete foundations.

The frost resistance of the compositions of this brand allows you to perform regenerating work at sub-zero temperatures. Products for the restoration of the brand "Birss" is durable and the ability not to miss the water.

A worthy representative of domestic producers of the market. Brand products are ideal for the regeneration of various systems of concrete. Does not sink during solidification, it is firmly engaged with concrete.

Mortar is designed to operate in conditions of high degree of humidity. When freezing does not subside. After full hardening a coating is formed that is resistant to moisture and low temperature, all flaws are closed.

Ideal for waterproofing concrete. In addition to leveling the surface, the mixture gives moisture resistance to the structure and vapor resistance. The main advantage of the building material is the absence of toxic components and convenient packaging of 5 kg, it is possible to work with it both indoors and outdoors.

Another representative of Russian manufacturers. Repair mix NC60 is a material that can be used to recreate various concrete surfaces.

The manufacturer promises easy reconstruction of concrete. When hardening, the solutions of the brand sit down a little, but do not crack, the surfaces do not wear out for a long time. The SW series is applied on reinforced concrete products.

Its advantage is resistance to the influence of negative environmental factors: increase and decrease in temperature. Thanks to the moisture-resistant composition, you can quickly carry out repairs.. When solidified, the solution creates an anti-corrosion layer and is considered an excellent hydro insulator.

Reconstruction goods of the brand are used for repair and reconstruction, to correct the defects of concrete, reinforced concrete, foam concrete surfaces, as well as aerated concrete.

They fill the cracks, technological grooves and holes, close up chips, erosion and voids, correct defects of old concrete products, concrete floors, walls and ceilings.

A popular series of B25 repair mixes from a Russian manufacturer, designed to update cement-sand screeds, remove concrete pouring defects and fill in inter-panel joints.

To select and buy high-quality repair mix, you need to use the advice of professionals.

• At the first stage, it is necessary to conduct a visual inspection of the concrete surface and determine:
  • type of flaws;
  • their sizes;
  • possible loads.
• To choose a manufacturer, you should consider at least two options, compare the cost of products of this segment, its features and study the composition (the mixture should be non-toxic and safe for humans).
• Having calculated the thickness of the future layer and the area of ​​reconstruction, you need to buy the appropriate amount of the mixture.
• If you need to strengthen the concrete foundation, it is better to buy a deep-penetrating solution.

• For strengthening vertical surfaces, tixtotropic mixtures are best suited. They have a thick texture, well adhere to the concrete, so they will firmly hold on the walls.
• Mixtures for leveling the surface must be distinguished by high adhesive properties.
• Important characteristics that you need to know before buying a repair mixture are:
  • solidification period - the smaller it is, the better;
  • material consumption - in the instructions on the package, as a rule, it is indicated how much the mixture is required to perform a specific task;
  • UV protection degree sun, frost and chemical effects;
  • shrinkage - there are non-shrinkable repair mixes, it is better to buy them.

How to repair cracks in concrete, see the following video.