Tunnel Passing Through Fault Zone helped with Polyurethane Injection

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The polyurethane grout, SealGuard II, was needed to mine forward in this tunnel.  The tunnel was in a fault zone, and all the voids were to be filled with concrete.  However, when injected, the concrete leaked out of the face.  To contain the concrete, polyurethane grout was injected to provide a buffer. SealGuard II reacts […]

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Water Leaking through Old Mine Core Hole Stopped with Polyurethane

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This underground mine, which is 1,100 feet below the surface, mined into a core hole taken from the surface.  The core hole was dumping significant amounts of ground water into the mine.  To stop the water inflow, a high-pressure probe and polyurethane grout was implemented. Grouting contractor Sub-Technical, Inc. used their specially designed probe to […]

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Wastewater Basin Exterior No Dig Polyurethane Grout Injection

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Groundwater was leaking through the joints of these underground chambers at a wastewater treatment plant.  Injecting polyurethane grout from inside the structure would provide an ideal fix to stop the groundwater from infiltrating.  However, these chambers have various pipes and support structures that would make entry and performing the work nearly impossible.  The solution was […]

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Elevator Shaft Repair and Water Control with Polyurethane Grout Injection

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This elevator shaft was leaking groundwater in between the floor and the first course of concrete filled block walls.  Although this shaft has a drainage system, it needed to be dry to pass the final building inspection.  To stop the unwanted inflow, polyurethane grout was injected to seal the leak paths. The grout used was […]

Tunnel Boring Machine Brush Replacement and Water Control

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A view of the tail seal brushes on a tunnel boring machine.  In this situation, the tail seal brushes needed replaced and there was water flowing through seams in the tunnel segments. To control the heavy flow of water, polyurethane grout was injected around the leaks.  The grout used was SealGuard II, which is manufactured […]

Effective Precast Concrete Water Sealing

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Click to Expand Water intrusion can cause serious structural damage to buildings, leading to costly repairs and potential safety hazards. That’s why selecting an effective water sealing solution is crucial for any construction project. Precast concrete structures have low permeability rates, which means they can effectively prevent water intrusion and provide reliable and durable sealing. […]

Everything You Need To Know About Manhole Repair

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Click to Expand Manholes are essential to any urban infrastructure, providing access to underground utilities such as water, sewage, and electrical systems. However, they can deteriorate, crack, or collapse over time due to constant exposure to heavy traffic, weather conditions, and corrosive materials. These failures can cause accidents, traffic disruptions, and even sewer backups, resulting […]

Leaking Pipe Intrusion Sealed

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Water leaking around pipe intrusions can be stopped with polyurethane grout.  In this instance, a hole was drilled at an angle to reach the annular space in-between the pipe and the concrete.  SealGuard II, a dual component polyurethane grout, requires a static mixer to mix properly.  The mixer gets inserted into the drilled hole, then […]

Directional Drilling Water Control

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When water is encountered during directional drilling, the most common method to try and stop it is pumping concrete. However, if there is a large volume of water, the concrete simply washes away and doesn’t seal the leak.  Concrete also shrinks as it dries, so new leak paths are formed.  In this instance concrete was […]