Start by running the chisel through the crack to remove any obviously loose pieces of concrete. Concrete floors and subfloors can be repaired using one of three common methods. All of this involves covering the existing concrete slab with a new layer of concrete or a concrete-like cover and finishing the new layer as desired. These methods can be used on interior and exterior surfaces and are intended for surface restoration only; they are not suitable for repairing major cracks or other structural problems in existing concrete slabs.
Using a small brush, cover the surface of the crack with a thin layer of adhesive for gluing concrete. Allow the adhesive to dry completely; you'll know it's dry when it changes from an off-white liquid to a clear coat. Make sure that the bonding liquid in the depths of the crack has dried completely. This can take at least an hour.
Smooth the surface with a spatula or trowel. Anchor cement expands as it hardens. It is mainly used to anchor bolts in drilled holes in concrete, but it also works well here. Keep the area moist until the patch heals.
Anyway, if I were to demolish a house, I would make sure to hire a concrete slab sawing service, as they are equipped with the right tools and equipment. Reclamation has a large inventory of aged concrete that is experiencing deterioration resulting in cracking or exacerbated by cracking. As a first step to increasing the likelihood of a successful repair, it is essential to use a consistent and systematic approach to concrete repair. A concrete slab is one of the most stable and durable floor surfaces out there, but over time, the slab will inevitably develop small cracks and chips.
Holes 1 inch or deeper require a concrete mix with coarse-crushed stone aggregate, which adheres well to existing concrete. Once the offending rocks are removed, you'll want to remove any weakened concrete in the slab crust around the emerging depression. I am certainly guilty of letting concrete problems persist until a larger and more costly solution is required. The following describes some concrete floor repair methods that could be used according to the need for concrete floors.
Occasional cracking is common in almost all concrete slabs as they age, and such cracks are usually not a major concern. A simple method of repairing damaged concrete is by using a caulking gun to apply the elastomeric masonry crack filter to fill these cracks. A stamped concrete treatment is similar to a microcoating, but contains more sand and provides a rougher concrete surface finish. If the surface has too many bumps for individual repairs, or if during the repair the surface suffered delamination, contractors should consider using a thin bond concrete layer.
Simply pouring wet concrete into a hole in the driveway, sidewalk, or basement floor will not make the repair durable. With the right tools and materials, you can perform durable and aesthetically pleasing repairs of common concrete surface imperfections.