How to repair cracks and damage in a concrete floor and screed
A concrete floor is the most common and durable foundation, but there are a number of factors that can compromise its integrity.
There are enough reasons for damage to concrete structures and foundations:
- subsidence of the soil under the screed
- insufficient screed thickness or lack of reinforcement
- the absence of deformation seams on a large area of the room
- violation of recommended standards when mixing and pouring the coating
- unplanned stop of the mortar laying process
- insufficient structural connection between the old and new coating
- insufficient heating of the newly laid structure, non-compliance with temperature conditions
As a result, we get a concrete surface that can be cracked to varying degrees. These can be both thin and shallow cracks up to 1 mm wide, as well as problematic deep and larger ones. And if in the first case, with good reinforcement of the screed, such cracks will not spread further and will not cause inconvenience, then in the second case, repair of problem areas is necessary.
For high-quality repair of a concrete floor or screed, we will need a suitable repair compound Teknorep 300 or Teknorep 300 EX. These mixtures contain polymer fibers in their composition and are characterized by increased bending strength. Of the tools we will need a mixer (it can be a drill or electric drill) with a nozzle, a grinder with a diamond disc, an improvised tool in the form of a hammer and spatulas.
We begin to prepare the surface.
To do this, it is necessary to cut the cracks 2-5 cm deep and 1-2 cm along the edges. The edges of the cut are knocked down to form a notch. After that, it is necessary to purge and clean the places of cuts. Now we treat the slots with a primer mixture, waiting for it to dry. To prepare the solution, pour the required amount of water into a container, gradually add the mixture and mix with a mixer for 5 minutes. Then soak the solution for 3 minutes and mix again for 2 minutes until a homogeneous mixture is obtained. We seal the cracks with the prepared solution. It is worth noting that cracks in the floor, which appeared as a result of shrinkage of the poured solution, must be expanded to a depth of up to 5 mm.
As you can see, the process of repairing cracks in a concrete floor or screed is quite simple and economical, and the use of special repair solutions Teknorep 300 and Teknorep 300 EX allows you to do it efficiently and in a short time. Teknogrout EX can be used to repair larger damages, this mixture is characterized by increased fluidity and increased resistance to freezing and chemicals.
Remember that the use of high-quality materials, as well as compliance with the norms and recommendations of manufacturers, will allow you to perform any work efficiently and practically eliminate the need for subsequent repairs.
