Concrete crack repair can be done temporarily according to concrete contractor Gulfport MS by mixing a polymer-modified cement product with water in a bucket, then troweling the resulting mud over the fissures. While neither a long-term nor a structurally sound repair, doing so will work if the fractures are merely signs of concrete’s maturation process — little fissures that appear when concrete dries when the mix is excessively wet. However, if the cracks were caused by outside forces like a tree root or ground swell, such as pressure or torque, a rapid remedy will not be sufficient.

In the past, the only effective way to repair a fracture in concrete was to completely remove the break, which involved scraping away the surrounding concrete and repouring the affected area. Removing concrete, however, might compromise the structural integrity of the concrete and cause severe harm in situations where the concrete bears heavy loads or is supported by rebar.

Fortunately, modern epoxies have improved to the point that they frequently have more tensile strength than concrete once they have dried. Therefore, using industrial epoxy greatly reduces the possibility of compromising the structural integrity of a wall or flat construction. Epoxy can reduce or stop the growth of cracks, but it does not have the same visual consistency as entirely filling in the fissures and starting again on a cracked section of concrete.

There are three different kinds of concrete cracks: those without rebar, those with rebar, and those that provide structural support. Understanding the function of the concrete is necessary to choose the right repair for a crack.

Concrete Not Supporting Weight Without Reinforcing Bars

Rebar is not required for pouring concrete for non-weight-bearing constructions like patios, sidewalks, and driveways. Concrete that has cracked but does not have reinforcing bar can be repaired by using a concrete saw to cut off the damaged area, breaking up the concrete with a sledgehammer or jackhammer, and then filling the hole with new concrete. Prior to adding more concrete to the area, it’s crucial to identify the root cause of the concrete’s first cracking and take corrective action to avoid further damage. Concrete cracks in flat work often result from roots. By cutting the roots and pouring a substantial amount of rock salt on the ground before re-pouring the section is generally a long-term solution to root problems.

Fixing ground swellings is a more challenging issue. The easiest way to stop ground swelling is to dig a hole in the earth and fill it with a substance that is extremely porous, like crushed rock, or extremely non-porous, like clay. The portion can be kept from cracking again by filling the hole with concrete up to the level of the current concrete.

Concrete That Is Not Weight-Bearing And Has Reinforcing Bar

Repairing minimal-weight-bearing cracks using rebar is the same as doing it without it. There is one more step, though. It is essential to use the concrete saw sparingly, simply cutting a few inches into the concrete at a time to avoid damaging the rebar. When rebar is present, it is not a good idea to use a jack hammer to break the concrete out since the chance of cracking or breaking the concrete around the broken portion that needs to be removed increases enormously. To reduce the risk, use a carpenter’s hammer and a hand sledge. Repour the portion after taking further precautions to ensure that the new concrete doesn’t break due to the same problem.

Weight-Bearing Concrete With Rebar

It is substantially more challenging to fix weight-bearing concrete cracks with rebar than it is to fix cracks in concrete that only support a small amount of weight. The structural integrity of weight bearing concrete, such as retaining walls, footers/foundations, and columns, can be compromised by cutting away pieces. The catalyst for the cracking must be removed as a first step. For instance, to repair a retaining wall that has cracks, it is necessary to remove the material from behind the wall, install an appropriate drainage system, fill the cracks with industrial epoxy, and then fill the space with a less prone to swelling material.

Cracks in Footers/Foundations, Block Walls and Columns

Epoxy can also be used to fix cracks in block walls, footers, and foundations, but it’s still important to address the root of the problem first. To stop a house from settling further, for instance, a boot may need to be built on the outside of the foundation. Another important problem is a column that has cracks in it. Although there are ways to patch up the cracks, the main challenge is avoiding additional deterioration. To support the weight above, extra columns might need to be added. Another alternative is to construct a rebar cage around the column, pour more concrete around it after constructing the cage, form six-inch holes in the existing concrete, drive rebar into the holes, and link the rebar to it.

Keep in mind that every job is unique.

Concrete crack repair is a job-by-job decision. Do the concrete’s load bearing capacity and rebar presence need to be taken into account before deciding what is necessary? If not, the solutions are rather straightforward.