Cellular Grouting

Better Methods, Better Results

Cellular grout is an ideal material for filling the annular space between the carrier pipe and tunnel, as well as for slipline projects. For decades, we’ve used lightweight cellular grout as backfill for lined tunnels on projects all over the country.

There are many advantages to using cellular grout instead of regular sand-cement grout. Major advantages of cellular grout include the considerably lower density, superior fluidity, and unique stress-deformation characteristics. The density of lightweight grout is one-third to one-half the weight of regular grout. Therefore, the buoyancy effects of the conduits will be one-third to one-half as much. This greatly reduces the possibility of deflection and flotation of the conduit.

With increased fluidity, the cellular grout readily flows into irregular voids, requires no consolidation, and improves the pumpability of the mix. Therefore, less pressure is needed to pump the mix, which reduces the risk of collapsing the ducts. The stress-deformation characteristics of the cured cellular grout allow it to adapt to the movement of the confining media without applying too much stress or distortion to the carrier pipe.

Midwest Mole is a trained and licensed contractor of cellular grout. We can install lightweight grout for geotechnical fills, abandoned structures, and annulus grouting for sliplining and carrier pipe installations.

Benefits of Cellular Grouting:

  • Cellular grout is a low-density material
  • Highly fluid, flows easily into irregular spaces
  • Can be excavated more easily

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Are you interested in leveraging Midwest Mole's industry-best services for your project? Drop us a line with some basic information about the job, and we'll get back to you with a pricing estimate as soon as possible.

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