EPOXY RESIN INJECTION
Understanding cold joints
Cold joints typically occur when concrete is placed in multiple stages or delivery is delayed, causing the first batch to begin setting before the second is poured. Though these joints may not pose a severe threat under static loads, they can compromise a foundation’s ability to dampen machinery-generated vibrations, creating long-term weaknesses.
Why epoxy resin injection?
Studies like ACI 503R-93: Use of Epoxy Compounds with Concrete confirm that resin injection can restore cracked or flawed concrete to near-monolithic strength. By penetrating potential voids and bonding separate pours, epoxy injection:
- Eliminates minor voids or gaps and prevents moisture ingress.
- Reinforces the contact surfaces so they function as a single, cohesive block.
- Enhances the foundation’s vibration-dampening capability.
Alphatec Engineering’s proven repair solution
Our repair process for cold joints and cracks involves injecting epoxy resin at either high or low pressure, depending on the extent of the damage. When necessary, we apply a small quantity of ALPHATEC® 440 between pours, for proper load transfer and vibration absorption. This method is suitable for a wide range of concrete structures—walls, slabs, columns, piers—and helps ensure the foundation regains near-pre-cracked strength.
Key benefits
- Restored Stability: Repaired sections regain structural integrity, extending the foundation’s service life.
- Optimised Vibration Control: Properly sealed cold joints allow the foundation to absorb and dampen machinery-induced stress.
- Proven Durability: Our methods align with established ACI guidelines, offering reliable, long-lasting solutions.
- Versatility: Epoxy resin injections address a variety of concrete issues, from minor cracks to more significant structural concerns.
For a closer look at our process, feel free to explore our resin injection video. If you have concerns about cold joints or suspect existing foundation issues, contact us today for an assessment. Our goal is to help you safeguard your operations by keeping your foundation stable, resilient, and vibration-ready.
