Concrete floors and subfloors can be repaired using one of three common methods. All this involves covering the existing concrete slab with a new layer of concrete or a layer similar to concrete and finishing the new layer as desired. These methods can be used on interior and exterior surfaces and are intended only for surface restoration; they are not suitable for repairing major cracks or other structural problems in existing concrete slabs. To treat concrete with a weak or soft surface, apply a concrete densifier or hardener.
These types of sealants contain sodium or lithium salts that chemically reinforce the concrete surface and further solidify the crystal lattice that forms the glue in the concrete. In areas where the tape removed the paste from the surface, you can apply a microlayer (see Concrete overlays) or a colored patch material to match the existing finish. Using a small brush, coat the surface of the crack with adhesive adhesive for concrete. Allow the adhesive to dry completely.
I painted the concrete floors in my kitchen with a concrete paint purchased from a local hardware store. One of the most important characteristics of self-leveling concrete is that it can provide a very dense and durable concrete floor. Concrete floors should be repaired with a surface covering only when the concrete slab contains surface or fine cracks or has aesthetic surface defects. Cracks in concrete are considered long-term durability and maintenance problems because they increase the permeability of concrete.
Crack cracks occur when the concrete surface dries and contracts at a different rate than the underlying concrete. Concrete sealing and coating compounds are applied to cured and dried concrete as a maintenance and repair procedure to reduce or prevent the penetration of water, aggressive solutions or gaseous media. Resin injection is used to repair cracked or delaminated concrete, as well as to seal cracks or joints in concrete that is experiencing water leakage. His problem indicates that the concrete was not porous enough to accept the primer or paint, a very common problem when painting concrete.
From the details you have provided, it appears that the concrete replacement sections are failing and are soft, either due to poor concrete mixing and placement design or post-applied chemicals. As more and more have concrete floors in their house, it will be very important to repair or try to avoid any of the problems you described at the time the concrete is poured. A stamped concrete treatment is similar to a microtopping, but it contains more sand and provides a rougher concrete surface finish.