What is epoxy injection used for?

These products are ideal for repairing holes, chips and cracks in concrete, in both internal and external situations where heavy vehicle traffic is anticipated. Epoxy injections are designed and used to restore the strength and integrity of structural elements in cracked concrete.

What is epoxy injection used for?

These products are ideal for repairing holes, chips and cracks in concrete, in both internal and external situations where heavy vehicle traffic is anticipated. Epoxy injections are designed and used to restore the strength and integrity of structural elements in cracked concrete. But these cracks must be relatively dry for the epoxy to achieve adhesion. After all, epoxy injections will not shift or react with water.

Therefore, they are ineffective in waterproofing a leaky crack. Epoxy injection is commonly used to restore the pre-cracking condition of the member without increasing its strength. The epoxy tensile bond to the concrete substrate is stronger than the tensile strength of concrete. Future cracking may occur with the same load as that of the original seamless member, but at different locations.

Reinforcement is achieved by installing additional reinforcements along the fault plane in combination with resin injection. Often, internal or external reinforcement is installed in combination with epoxy injection for strengthening and restoration. Crack injection can be successfully performed in cracks as narrow as 0.013 mm wide with general epoxy injection resins. Cracks with less width can be injected with epoxy or other polymer systems having a low viscosity of 200 cps.

In short, epoxy injections are ineffective in sealing cracks or preventing water from seeping through the other side of concrete structures. Another option for small leaks is to clean the injection epoxy and use paraffin or crayon to seal the holes. Injection ports, which can be surface mount ports or plug mount ports, are the means by which epoxy resin will be supplied into the cracks. If water seeps continuously through the crack, the flow must be stopped for the epoxy injection to produce a proper repair.

Once the capping paste is used, the ports are drilled or installed, and any loose materials and dust are removed from the cracks, epoxy injection can begin. While this method may appear to leave some ports uninjected, it provides maximum pressure to force the epoxy into the smaller areas of the crack. Epoxy resins are formulated with specific fillers to allow the penetration of small cracks and a low exotherm for larger cracks. Although injection of epoxy resin presents an excellent means of repairing cracks in floors and walls, it is not designed to seal leaks.

Most epoxy injection repairs are performed with injection machines or guns that are placed at an air level suitable for the given application. The epoxy injection process can be performed in any climate and environment as long as special precautions are taken to ensure that the temperature remains within the range for optimal application. Epoxy injection is a resin-based sealant that is forced into cracks inside the concrete to prevent the rebar from being damaged and to prevent water from accumulating on the base. Epoxy and other resins lose strength when exposed to fire or sustained elevated temperatures and flame retardant protection is required for such structural repairs.

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