Epoxy injection has been successfully used in the repair of cracks in buildings, bridges, dams, and other types of concrete structures. High strength epoxy adhesives are commonly used to seal, bond, and reestablish the strength and integrity of the distressed slab.
The epoxy bonds the two sides of cracked slab together and the surface is ground smooth after the epoxy cures. This method is applicable for minor cracks in slab.
a. The crack is cleaned and prepared for epoxy bonding
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b. Temporary injection ports are bonded to the slab directly over the crack.
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c. The crack is sealed on the surface with a temporary bonding agent
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d. The two part epoxy is mixed and pressurized into the crack with a high pressure injection
gun. The epoxy penetrates the full depth of the crack
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e. After curing of the epoxy, ports are stripped and slab is ground smooth.
*****Sometimes steel reinforcement is utilized on slightly larger cracks with a vertical offset. This method is typically referred
 to as "slots", staples, or stitches, and is used to obtain a greater strength at those distressed areas. |
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