A concrete floor is the most common and durable foundation, but there are a number of factors that can compromise its integrity.
There are many reasons for damage to concrete structures and foundations:
- subsidence of the soil under the screed
- insufficient screed thickness or lack of reinforcement
- absence of expansion joints over a large area of the room
- violation of recommended standards when mixing and pouring the coating
- unplanned stoppage of the mortar laying process
- insufficient structural connection between the old and new coating
- insufficient warming up of the freshly laid structure, non-compliance with temperature conditions.
Pro Tip: Professional concrete contractors in Guelph! Get high-quality services for driveways, sidewalks, patios, and more. Contact us today for a free estimate!
As a result, we get a concrete surface that can be covered with cracks to varying degrees. These can be thin and shallow cracks up to 1 mm wide, or 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 and are characterized by increased bending strength. From the tools we will need a mixer (this can be a drill or an electric drill) with a nozzle, a grinder with a diamond disc, and improvised tools in the form of a hammer and spatulas.
We begin to prepare the surface.
To do this, it is necessary to saw the cracks 2-5 cm deep and 1-2 cm along the edges. The edges of the cut are knocked down to form a recess. After that, it is necessary to blow out and clean the cut areas. Now we treat the slots with a primer mixture, wait for it to dry. To prepare the solution, pour the required amount of water into the container, gradually add the mixture and mix with a mixer for 5 minutes. Then we let the solution stand for 3 minutes and mix again for 2 minutes until a homogeneous mixture is obtained. We fill the cracks with the prepared solution. It is worth noting that cracks in the floor that appeared as a result of shrinkage of the poured solution must be expanded to a depth of 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 this qualitatively and in a short time. To repair larger damage, you can use Teknogrout EX , this mixture is characterized by increased fluidity and increased resistance to freezing and exposure to chemicals.
Remember that using high-quality materials, as well as following manufacturers’ standards and recommendations, will allow you to perform any work with high quality and will practically eliminate the need for further repairs.
CD Roofing