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Repairing Concrete: Hiring the Pros Once signs of cracks are found on the concrete, a professional concrete repairer will always first evaluate the condition of the concrete and check whether the cracks are a structural or superficial kind of damage, such that if it is a structural crack, it should be likely a large diagonal crack running across a concrete beam, which is a delicate and critical job that can be repaired by an engineer. During the evaluation, tools like a hammer and spray paint are used, such that by pinging the concrete surface with the hammer, if delaminated areas are found, which produce a dull, hollow sound, these are outlined by the spray paint as a way of marking them. After evaluating the concrete damages, the length of damage is measured documented by taking notes on the evaluation, as well as taking photos of them. The second step in the procedure of repairing concrete damage is identifying the concrete problem and its causes; therefore, here are the most common problems: corrosion of reinforcing steel, which is caused by the presence of chloride ions in the concrete that react with the steel that eventually results to rusting; freeze-thaw disintegration, which results when the concrete is porous such that water seeps in and freezes and breaks the concrete surfaces; alkali-aggregate reaction, which is a result of reactive aggregate in the concrete that forms a gel around the aggregate particle, such that when the gel gets wet it expands the aggregate and the expansion destroys the concrete; drying shrinkage cracks, which is a condition when the concrete has more moisture content, such that when water evaporates there is tendency for the concrete to shrink; plastic shrinkage cracks, which is a condition when the concrete surface dries out first before the concrete can gain strength, a pattern of cracks will form on the surface; blisters or delamination, which is a condition which results into bubbled concrete surfaces caused by premature finishing and sealing of the concrete surface, which seals in air and bleed water; and cracks from structural loads. Once the evaluation of the concrete damage and problem determination are done, the next step is to find out the type of repair to be done, such as: full-depth repair, which is cutting out the damaged concrete, replacing the reinforced steel and replacing the concrete; partial depth repair, which is cutting around the edges of the damaged area, removing the damaged concrete, cleaning or replacing the reinforced steel, then placing a repair mortar; and overlays, which is an effective procedure to cover up a surface problem for as long as the surface preparation is used.
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For simple cracks at home, an easier method to permanently repair the cracks is by using low-pressure injection of an epoxy or polyurethane foam material and this method can also be used for the repair of concrete floor cracks.If You Think You Understand Services, Then This Might Change Your Mind