Speaking about concrete substrates, one involuntarily thinks that these surfaces are durable and strong, but even such structures are not eternal. During operation, exceeding technical capabilities and simply wear of parts, surfaces, structures, cracks, chips, other defects arise on them, which entail partial or complete destruction. Fortunately, at the present stage of construction and the development of technological progress, there is no need to carry out major replacement or repair. It is enough to carry out restoration work, armed with a special system and seal / blow out cracks with a non-shrinking mixture.
What is it and how to use it, let's talk in more detail.
Features of repair mixes for concrete
Reliable adhesion of the composition and the concrete base is ensured by a specially selected component composition. Recovery mixtures differ in such characteristics:
- not afraid of frost;
- resistant to sharp and unpredictable temperature changes;
- vapor permeable;
- durable
- high strength;
- with increased grip;
- possess antiseptic properties;
- water repellent properties are increased.
When you need to treat a concrete structure with a non-shrink mixture
Prolonged use of concrete structures, active use of concrete foundations or violation of construction technology sometimes leads to the formation of defects on the surface and inside concrete. Today there is a great opportunity to fix them by buying a special composition. Such a mixture will be needed for concrete reconstruction, if you notice:
- the presence of potholes in the concrete base;
- open cracks from 0.3 mm;
- dust formation in excess of permissible standards;
- the presence of voids in the concrete structure;
- foci of deep or surface corrosion of concrete;
- chipped structures with exposed reinforcement elements;
- the presence of defects from 0.2 mm.
At least one of these “flaws” indicates that it is worthwhile to restore using a special non-shrinking mixture.
Species variety of concrete reconstruction mixes
Depending on the purpose and scope of the repair work, these types of compounds are divided into:
- Special restoring concrete mix structures (for columns, beams, slabs).
- Compounds used mainly for repairing pavement and flooring.
- Special non-shrinking mixes for concrete repair, characterized by protective anticorrosive properties.
A short description of each species
The former are ideal when leveling or repairing cracks in load-bearing concrete structures.
The second are characterized by distinctive frost resistance, enhanced protective and water-repellent properties, and excellent adhesion.
The third and last are used if it is necessary to prevent mold, fungal and corrosive formations on concrete.
Repair mixtures for vertical and horizontal surfaces: what is the difference
Another classification that you should not forget about is the membership of the compounds in:
- mixtures used for work on vertical surfaces;
- mixtures suitable for use on horizontal planes.
The former are characterized by qualities such as increased reliability and strength, since horizontal surfaces are influenced by ultimate loads, which is not difficult to assume.
The second - for vertical surfaces, have a high level of adhesion, providing reliable adhesion.
Shrink and without
Assuming that if we are talking about non-shrinking mixtures, then there are also those that shrink.
Those that shrink suggest more painstaking work, since in this case it is necessary to calculate the necessary indicator of the thickness of the application of the interlayer, which is compressed after a certain time. This necessitates reprocessing for higher reliability. But the use of shrink mixes takes place in the construction industry, moreover, they can not be said badly.
In turn, non-shrinking dry concrete mixes differ in such positive characteristics:
- increasing the speed of performing all stages of repair work on restoration;
- high level of performance;
- convenience in work;
- excellent durability;
- durability.
Overview of the popular domestic repair mixture
What kind of composition is it that has received many positive reviews from customers? Slightly open the curtain and present to the reader the Emaco repair mix that is sensational in the market.
The composition is used for the restoration of concrete structures, regardless of the type of complexity of the defect, which makes it universal in application, and, therefore, promotes it among competitors.
The manufacturer made sure that the product line was as useful, diverse and accessible as possible. Therefore, to restore concrete, the company produces goods that are suitable for five categories of concrete damage:
- The first: pollution, small shrinkage cracks and shells not exceeding 5 mm. Best choice: mix grade N 5100.
- Second: cutting or peeling surfaces, the presence of not too large chips. Best option: composition brand N 900, N 5200.
- Third: destruction, accompanied by rusty smudges and cracks up to 0.2 mm and a maximum depth of damage, not more than 40 mm. Best product: composition brand S 488 PG, S 488, S 5400.
- Fourth: the presence of cracks from 0.2 mm, bare sections of reinforcing joints, strong carbonization. Observation of damage with a depth of 10 cm. The best recommended grade: T1100 TIX, S 466, S560FR.
- Fifth: characterized by severe damage due to exposed aggregates and reinforcement, the presence of deeper chips with a damage depth exceeding 20 cm. Best choice: Nanocrete AP - protection of metal elements from corrosion processes, repair mixture "Emako" A 640.
Please note that the price of all concrete mixtures of the declared manufacturer ranges from 13 to 26 dollars per 25 kg.
As you can see, a non-shrinking concrete mixture of a bulk type or a dry composition can solve a lot of problems associated with the need to restore or repair the structure. Therefore, before you ruin and ruin something, desperate to find a solution, contact the construction company for help, where they will help you, advising the appropriate mixture option.