Repair of concrete floors
Experts for the past many years,They note that the concrete floors have won the love of consumers and are widely used. Due to such a situation of concrete floors of their performance characteristics and superior performance. So, they are not only high strength, but low rate of dust separation, chemical resistance and deformations. Everything else, the cost of concrete floors is small, which is also their undoubted advantage. Despite the many advantages, sooner or later the repair of concrete floors is inevitable.
- The need to repair concrete floor
- Causes of defects in floor
- The destructive effect of the soil
- Various internal factors
- Influence of external negative
- Repair cracks in the concrete floor
- Repairs small cracks
- Repair of deep cracks
- How to repair shrinkage cracks
- Other types of defects in concrete floors
- Local delamination of the front surface
- Any cracks in the concrete floor
- Eliminating horizontal irregularities
- Loosening the top layer of concrete.
The need to repair concrete floor
Obviously, however was not durable floor, itconstantly exposed to a wide variety of influences: mechanical or chemical. This leads to the appearance of defects on the surface of the coating varying complexity. However, modern technology and materials make it possible to successfully eliminate the majority of the damage and return the original aesthetic appearance of the concrete floor.
Obviously, timely and quality repair concrete floor will increase its service life and eliminates the unwanted money and time spent on laying a new floor.
Before recoveryworks, it is necessary to conduct a thorough diagnosis of injuries and as accurately as possible to determine their causes. This allows to choose the right technology to eliminate defects.
Causes of defects in floor
To date, all the causes of various defects in the concrete floor can be grouped into several groups.
The destructive effect of the soil
The main problems include the expertsheave in the winter in a poorly heated rooms; low quality bulk soil compaction; occurred since the shrinkage of the structure; undermining groundwater and many other problems.
In such situations, the facial concrete coating canlook quite attractive and match the existing operating conditions, however, when it detects internal defects require major reconstruction.
Various internal factors
These usually include educationcracks due to shrinkage or lack of care of the floor surface in the first hours after laying; detachment from the surface layer of concrete. In the event of such situations the concrete floor surface is subject to restoration work only after necessary in a particular case, a complex repair.
Influence of external negative
External factors influencing thethe condition of the concrete floor and leading to its destruction, can be considered a dusting of concrete as a result of natural wear surface coatings; dents and chips from the impact of heavy objects on the floor; chemical corrosion.
If the damage are local in nature and do not affect the entire surface of the floor, steps shall be taken to eliminate the existing defects and strengthen the floor by special trains.
Otherwise, when wear damagewidespread, eliminating defects will not be enough. Experts recommend to resort to the elimination of the old concrete pavement and new floor unit.
To date, all the defects of the concrete floor can be subdivided into several groups, depending on their complexity. The most common problem of the floor is considered to be cracking.
Repair cracks in the concrete floor
Undoubtedly, the cracks on the surface of the concrete floormay be different, both small and larger and deeper. Repair of deep cracks is more complex, it requires more time and cost.
Repairs small cracks
Such repair cracks in the concrete floor does not take much time, does not require a massive and complex equipment, occupying, respectively, less time.
Thus, elimination of cracks is necessary to start withits thorough examination. It will help to identify the presence of chips next to it, if ignored, could lead to negative consequences, in particular, to the appearance of holes in the floor.
To prevent such a situationyou need to use a chisel and walk them along the cracks, tapping the tool with a hammer. This measure will help to discover hidden chips, which can be subsequently removed.
Using the same chisel a crack in the surface of the concrete floor is shaped conventional cone. Then it is removed from the dust and any debris, and she watered the crack.
It was a preparatory stage repair cracks inconcrete floor. Upon its completion, should prepare a cement mixture, in which the PVA glue is added. The result should be quite liquid formulation that is filled into the crack.
When pouring the mixture should be remembered that it shrinks. That is why the solution should be poured slightly above floor level. Surplus removed with a spatula or a conventional wooden slats.
After drying the surface of the cement solutionfloor sander is processed, and in its absence - abrasive wheel. To eliminate concrete dust floor surface is locally filled with water.
Repair of deep cracks
If the concrete floor found quite deep and large cracks, the improvised means do not work.
So, you need to use for the start of worka circular saw to make along existing fissures special cuts. They are necessary in order to eliminate part of the concrete floor, exposed strain.
It is worth paying attention to the fact that the diamond blade is used when working with a circular saw.
Using a chisel and a hammer, all concrete must be removed from the cut. The resulting "flap" is cleared of dust, that is, filled with water. Furthermore, it will improve the adhesion of the mortar and concrete.
As in the case of small cracks, prepared in advance by the grout poured into the crack a little above the floor. After that the floor surface is subject to the grout using a grinder.
After removing the excess solution can enjoy the view of a smooth concrete floor.
How to repair shrinkage cracks
In the event of shrinkage cracks usingSpecial machines made their "rasshivanie" to a depth of 5 mm. Then removed the concrete dust is carried out priming and filling cracks repair its structure.
Used repair mortar must not shrink!
After repairs and complete solidification of the cast in the composition of the floor surface crack zashlifovyvayut.
To prevent the occurrence of shrinkage cracksExperts recommend the use of special mineral-polymer complexes, which are added to the concrete at the stage of its mixing. These compounds compact the structure of concrete and compensate for its shrinkage.
Other types of defects in concrete floors
Today, in addition to traditional crackingthere are quite a number of other defects in the concrete floor, which are subject to removal. Their complexity determines the need for the use of certain equipment and the concrete floor recovery techniques.
Local delamination of the front surface
If there is on the surface of the concrete floor of local delamination of the underlying base can take advantage of special formulations.
Typically, this solution based on epoxy resins, characterized by low viscosity are introduced by injection through the face cover.
When the mass character of the peeling is recommendedcompletely remove the existing coating and to carry out laying of the new concrete floor. However, all work must be carried out only after careful preparation of the underlying base.
Any cracks in the concrete floor
Quite often, on the surface of the concrete floor there are potholes. Most often, their occurrence is associated with a fall to the floor a heavy object.
Available potholes should be thoroughly cleanedfrom debris, dust and oils, if they occur. Then the priming is done that improves the adhesion of concrete and repair mortar. As a rule, prepared by a pothole filled with a cement composition with the addition of reinforcing agents.
Special attention is recommended to be given to the circumstances inwhich repair mortar should cure. Thus, the concrete floor areas subjected to repair, must be stored under cover in a humid environment. Furthermore, for 8-10 days the floor surface must be protected against any loads.
Eliminating horizontal irregularities
Horizontal irregularities are the result ofsubstandard casting concrete floors and violations of relevant technologies. To eliminate these irregularities, a special machine, with the help of which the concrete subfloor is milled to a depth of 1 cm.
Thereafter, the surface is polished to eliminate unevenness. Then you need to remove concrete dust and soak the floor with polyurethane primer. The alternative may be an epoxy equivalent.
Prepared land filled repair compound, and after curing the surface is ground again.
Loosening the top layer of concrete
Wear of the concrete floor can lead toloosening the surface appearance. If failure of this nature do not exceed a depth of 3 mm, then this section is sufficient to remove the top layer of concrete by grinding. It is carried out prior to receipt of a solid surface that is thoroughly cleaned from dust.
Then the concrete is processed with special hardening and de-dusting compositions, which have a chemical effect. They may become an alternative formulations or polymer-polymer.
Thus, by analyzing a number of reasons thatlead to the appearance of the surface of the concrete floor or other defects, these types of defects and removal technology, it can be concluded that the recovery process of the floor concrete is rather time-consuming and responsible.
To perform high quality repair of concretefloors need to take care of the availability of all necessary tools and equipment. Just for reconstruction projects should take into account all the nuances and to comply with the technology. Otherwise, the result will be short-lived.