Grout injections involve pumping a cementitious mixture, known as grout, into the cracks or voids in the concrete. The grout mixture is typically made up of cement, water, and other additives, such as sand or fly ash. The grout is pumped into the cracks or voids under pressure, which helps to fill in the spaces and create a solid, cohesive mass. Once the grout has been injected, it is allowed to cure and harden, which helps to restore the structural integrity of the concrete.
Epoxy injections, on the other hand, involve injecting an epoxy resin into the cracks or voids in the concrete. The epoxy resin is typically a two-part mixture, which includes a base resin and a hardener. The two parts are mixed together and then injected into the cracks or voids under pressure. The epoxy resin flows into the cracks and voids, filling them in and creating a strong, durable bond. The epoxy resin also has the added benefit of being able to bond to both dry and wet surfaces, which makes it a versatile option for concrete repair.
Both grout and epoxy injections have their advantages and disadvantages, and the choice between the two will depend on the specific situation. Grout injections are generally more cost-effective and can be used for a wider range of applications, while epoxy injections offer a higher level of strength and durability. It is important to work with a qualified professional to determine the best method for your particular situation.