Concrete Crack Repairs Using Epoxy
Concrete cracks are repaired using different techniques and methods, such as epoxy injection depending on how wide, long, and/or deep the crack is. Most of the concrete cracks are related to shrinkage, heat, wrong joint placements, over stress and loading conditions and movements caused by external factors. Some of these repairs are completed by using epoxy injections applied directly to the crack. The procedure is different and varies depending on the crack location and whether the concrete cracks are horizontal or vertical. Some cracks might require additional steps, but this article will focus on concrete cracks repaired using epoxy.
When cracks go through a concrete surface, and there is visibility from both ends of the concrete element, the epoxy can be injected from both ends. Sometimes the application might require to make the epoxy more flowable or use another method to inject the epoxy into the concrete. The builder might also want to inject the epoxy more closely than usual so it gets into the deepest part of the concrete crack. Before deciding whether or not to use the epoxy repair, you will need to confirm that the cause of the crack is solved and no further movement is permissible. When the concrete is still subject to additional movement, then the epoxy injection process is not recommended.
There are some instances in which this process is not recommended. Structural cracks or cracks that are wide enough should not be repaired using this method, instead, consult your engineer and determine whether some chipping and demolition are needed. When there is water into the crack and it cannot be dried out, make sure to use a water repellent epoxy product. Concrete cracks due to corroded steel should not be repaired using the epoxy, as the steel will continue to decay and new cracks will appear. Kits for concrete repair are available handling cracks up to 1/4 inch wide.
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