Repairing Concrete Cracks Using Epoxy
Throughout the United States and Canada, the number of homes built on poured foundations has significantly increased. Per Item 786 in the Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges, the Texas Department of Transportation requires unidirectional high-strength carbon fiber fabric, fully saturated with compatible epoxy resin per manufacturer's recommendations, to form a CFRP system when making concrete repairs.
In this method, the hand placement of a low water content mortar is done by tamping or ramming of the mortar into place to make intimate Epoxy Injection contact between the mortar and the existing concrete. Once the ports are installed, you will need to seal the top of the crack.
The technician begins the epoxy crack injection through the lowest injection port until epoxy travels up the crack and becomes visible in the injection port immediately above it; then the lowest injection port is capped-off and epoxy is injected into the port immediately above it. This process is repeated until the injected epoxy is seen exiting the crack at the top of the foundation, or until the crack has been filled up to grade.
This paste is applied over the entire length of the foundation crack and, in conjunction with the soil outside, serves as a barrier to confine the epoxy within the foundation crack so that the injected epoxy is contained over the entire length of the crack.
1. Two-component epoxies, which effectively seal a crack and at the same time reinforce the repair area to be actually stronger than the un-repaired concrete area around it. Epoxies are always the preferred material when the structural integrity of the concrete is open to question.
As a result of our extensive experience in performing epoxy crack injections, AquaGuard Injection & WaterproofingŪ uses epoxies with differing viscosities as dictated by the characteristics of the concrete crack being injected; this is required in order to prevent the epoxy from bleeding through the crack into the soil on the outside during the curing process, which takes several hours.
Injection ports are placed over the cracks, which removes the need for holes to be drilled. Polyurethane is flowing into the crack, but not showing up at the next port. Epoxy injections are considered structural repairs and will weld the foundation back together when done properly.
Repair cracked concrete beams are investigated. Polyurethane foams are injected into the basement crack in a liquid form. NextStar concrete crack repair products used to repair poured foundation cracks. However, the urethane injections can only be applied to small cracks.
Epoxy can be used only in cracks that are completely dry. The epoxy level will drop as it penetrates the sand, but should cure and provide a seal to the bottom of the crack. Smaller cracks may require higher pressure. Minor epoxy leaks through hairline cracks can be sealed using paraffin wax.
This method was eventually adapted for basements via low-pressure injection of either epoxy or polyurethane foam, with use of a manual dispensing tool. With epoxy, it used to be that the homeowner would need to wait for the rain to stop and the ground to completely dry out before foundation repair could even begin as epoxy will not adhere to wet concrete.
Rely on our epoxy injection company to see that the repairs are made quickly. Building up our strength in concrete repairs. Slab is a water-based acrylic latex caulk for concrete crack repair. The injected foam expands 20 times its volume after interacting with water to seal off all voids from front to back.