#Concrete slab crack repair products how to#

Preferably, contamination should be removed by vacuuming or flushing with water or other specially effective cleaning solutions. Contaminants such as oil, grease, dirt, or fine particles of concrete prevent epoxy penetration and bonding, and reduce the effectiveness of repairs. The first step is to clean the cracks that have been contaminated to the extent this is possible and practical. The effective modulus of elasticity of a flexible adhesive in a crack is substantially the same as that of a rigid adhesive because of the thin layer of material and high lateral restraint imposed by the surrounding concrete.Įpoxy injection requires a high degree of skill for satisfactory execution, and application of the technique may be limited by the ambient temperature.Įpoxy injection Procedure Clean the cracks The use of a low-modulus, flexible adhesive in a crack will not allow significant movement of the concrete structure. Wet cracks can be injected using moisture tolerant materials, but contaminants in the cracks (including silt and water) can reduce the effectiveness of the epoxy to structurally repair the cracks. With the exception of certain moisture tolerant epoxies, this technique is not applicable if the cracks are actively leaking and cannot be dried out. One is to rout and seal the crack, thus treating it as a joint, or, establish a joint that will accommodate the movement and then inject the crack with epoxy or other suitable material. If the cause of the cracks cannot be removed, then two options are available. However, unless the cause of the cracking has been corrected, it will probably recur near the original crack. The technique generally consists of establishing entry and venting ports at close intervals along the cracks, sealing the crack on exposed surfaces, and injecting the epoxy under pressure.Įpoxy injection has been successfully used in the repair of cracks in buildings, bridges, dams, and other types of concrete structures (ACI 503R). Methods of Concrete Crack Repair Epoxy injectionĮpoxy injection method is used for cracks as narrow as 0.002 inch (0.05 mm). On the other hand, if the cracks are due to a continuing foundation settlement, repair will be of no use until the settlement problem is corrected. Once the cause is known and type of crack is established, then suitable method can be selected.įor example, if the cracking was primarily due to drying shrinkage, then it is likely that after a period of time the cracks will stabilize. Suitable method for repair of cracks in concrete can be selected based on evaluation of the crack in structure for its causes.

#Concrete slab crack repair products how to#

How to Select Suitable Method of Concrete Crack Repair?

Overlay and Surface Treatments of Cracks.

Additional Reinforcement for Crack Repair.

How to Select Suitable Method of Concrete Crack Repair?.