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Tag Archive: polyurethane grout

  1. 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 insert into the core hole.  The probe contains a port where polyurethane can then be injected to permanently seal it off. The polyurethane used was SealGuard II, which is manufactured by SealGuard, Inc.  SealGuard II is a dual component polyurethane grout that reacts in about 3 seconds to produce a rigid foam.  The cured foam has a 900-psi compression strength.

  2. Horizonal Drilling and Hyperflex Grout

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    To install a pipeline underneath an interstate, a horizontal directional drill was used. However, the drilling discovered that the area consisted of large voids / karst zones. The pipeline itself needs to have a solid foundation to rest on. To fill the voids, polyurethane grout was injected into the problem areas. The grout used was Hyperflex, manufactured by SealGuard, Inc. Hyperflex reacts with the moisture in the ground which creates an expanding foam to provide a solid base for the pipeline. Hyperflex is NSF/ANSI/CAN 61 for contact with potable water. The grouting was done by Sub-Technical, Inc.

    Horizontal Directional Drilling and Void Filling with Polyurethane Grout.