The first step in repairing concrete is to fix the problem that caused the damage. Otherwise, the damage will just reappear later.
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If you’re dealing with a crack in concrete that doesn’t extend to the perimeter of your slab, you can usually repair it using a commercial crack filler and trowel. However, if you’re dealing with a more serious issue such as a structural failure or soil instability, it may be better to seek professional assistance.
First, you must identify the type of crack you’re dealing with. Narrow cracks typically are less than 1/4 inch wide and can be easily repaired with a simple concrete patching compound or filler. Wide cracks are usually deeper and require more extensive repair procedures that involve foam backer rods and a concrete patch. Cracks that are expanding can be a cause for concern as they will eventually compromise the integrity of the concrete structure.
Next, you must thoroughly clean the area around the crack. This is a vital step to ensure that the concrete crack repair job lasts. Use a pressure washer or a wire brush to remove any loose dirt or debris that is present. It’s important to remove as much loose material as possible so that the crack filler will adhere to it.
Once the area is completely cleaned and dry, you can then move on to step two. Apply a thin layer of bonding adhesive to the entire area around the crack. This will improve adhesion and increase the resilience and flexibility of the crack repair.
Finally, apply the concrete crack filler or compound. You can use a concrete mix, pre-mixed compound from a bucket, or a concrete patching compound. Be sure to follow the instructions on the label. Once the patching compound has been applied, smooth it out with a trowel to create a smooth, even surface. If the surface will be exposed to the elements, anchor a piece of plastic loosely over the crack for 24 hours to keep it dry.
Once the crack has been repaired, you should consider applying a protective concrete coating to prevent future problems with water ingress and weed growth. There are a variety of different types of protective coatings available, including water-based acrylic, epoxy, and polyurethane.
Slab Leaks
Slab leaks can be a big deal. They can result in water damage to walls, furniture, appliances, carpeting and flooring, and the foundation itself. In the worst cases, slab leaks can lead to mold, dangerous respiratory problems, and severe structural damage due to rotting support structures. It’s a good idea to call a local plumber as soon as you notice any sign of a slab leak, such as unexplained high water bills, damp spots on the floor, or an earthy, chlorine-like smell.
Pipes in a concrete slab can fail for a variety of reasons, including faulty installation, weakened water lines, chemical reactions between metal plumbing pipes and the metals in the soil beneath a home, and shifting ground conditions that weaken and crack pipes. Another cause is abrasion, which happens when pipes rub against other surfaces like gravel, concrete, or each other. This friction can gradually wear down pipes and create small holes or nicks that eventually lead to leaks. This problem is particularly common with pipes that carry hot water because the heat causes them to expand more than colder pipes.
A qualified plumber can diagnose and repair a slab leak with minimal disruption to your home. They can use a combination of visual and electronic techniques to search for and isolate the source of leaking water. This may include remote cameras and listening devices that evaluate the external traces that water leaks leave behind, as well as specialized inspection methods that are based on extensive professional training.
One way to fix a slab leak is to reroute the water line. This requires the creation of access holes, video inspections, cleaning and sealing of existing pipes, and a new line to be placed in the correct location. This option eliminates the leaking pipe and prevents it from causing future problems, but it can be time-consuming. Another option is to use a process called pass-through, where the old copper pipe is used as a sleeve for a new line. This option is quicker, but it can still take several hours to complete the job.
Loose Aggregate
Concrete is a versatile construction material that offers both durability and beauty. However, like all building materials, it requires regular maintenance to prolong its life and retain its appearance. Exposure to harsh weather and traffic can damage exposed aggregate concrete, resulting in loose and unattractive surfaces. Fortunately, concrete repair products can help extend the life of your property’s exposed aggregate concrete and restore its visual appeal.
The first step in repairing damaged concrete is to thoroughly clean the affected area of dirt, debris, and loose aggregate. This will allow the patching material to adhere effectively and prevent future damage.
Next, you will need to choose the correct concrete patching mix for your needs. A commercial concrete repair product that includes a high-quality concrete sand can ensure the proper balance between strength and aesthetics. For damaged exposed aggregate, a patching material that closely matches the existing texture is essential to achieve a seamless blend.
Once the patching mix is ready, it’s time to start repairing the damage. Begin by clearing the crack, hole, or dent of loose aggregate and any rough areas with a power washer or wire brush. You should also sweep the repaired area to remove any remaining loose aggregate.
Loose aggregate can pose a safety hazard for pedestrians or vehicles, especially in driveways and parking lots. It can also lead to surface damage, such as chipping painted surfaces or creating a slipping hazard for vehicle tires. Additionally, it can interfere with drainage and create structural issues. To address this problem, you should use a quality concrete repair product that contains an aggregate sand with low water absorption to minimize the risk of loose aggregate.
Finally, you will need to tamp the patching area and smooth it with a trowel. Once the patch is level and free of bumps or ridges, you can apply a concrete sealer to protect it from moisture and other damaging substances.
Although concrete repairs may be time-consuming and challenging, they are vital for extending the lifespan and improving the performance of your property. With a little bit of preparation and the right tools, you can complete these projects quickly and easily. For personalised advice, a quote, or more information, contact the team at Concept Concrete today.
Crack Repair
For linear dry cracks in concrete that are not caused by heaving or settlement, you can use a variety of repair materials to fill and seal them. Before using a crack repair product, clean out the crack by removing any loose debris, chiseling the edges to create a backward-angled cut (to prevent the crack from backing out) and vacuuming away any dirt or water. This will help the crack repair material adhere to the surrounding concrete surface.
Once the crack is cleaned, a cement-based patching compound should be mixed per the manufacturer’s directions and troweled into the crack. Force the product into the crack to ensure it is fully filled and to eliminate any air pockets. Once the patch is applied, it is a good idea to use a dry brush to feather the compound into the surrounding concrete to minimize any visual impact of the crack.
If the cracks are heaving or moving, you may want to consider a different repair method such as grouting and anchoring or epoxy injection. These methods are more intensive and require the assistance of a professional concrete contractor.
Epoxy injection is a cost-effective way to fix structural cracks in concrete foundations, basements and other concrete structures. It can be used to repair both active and dormant cracks, but the cracks must be dry before injecting the crack repair product. Once the product is injected, the packers must be sealed with a weberep epoxy adhesive (weberep epo 412 CRY) to prevent it from escaping during injection.
Another popular concrete repair technique for cracks that are heaving or moving is called routing and sealing. This method is ideal for repairing major cracks where the tensile strength must be re-established in the concrete. This method is most effective in preventing further movement of the cracks, but it does not completely close the fissures.