This is a great application of polyurethane grouting, to fill voids and stabilize soil behind a seawall at the Port of Los Angeles. Check out the video below from EagleLIFT.
NCFI Polyurethanes’ TerraThane Product Line Quickly and Quietly Improving Bottom Line for North American Geotechnical and Geoenvironmental Businesses
MOUNT AIRY, NC—The distinctly American company, NCFI Polyurethanes, is known for pioneering innovative, improved, and unique uses for one of their main product offerings: polyurethane foam. Since the company’s scientists and engineers began formulating polyurethane foam back in 1967, other chemical systems companies have been saying, “wonder what they’ll come up with next?” So, it was really more of a “holy cow” moment in the 1990s when NCFI began formulating foam systems for geotechnical uses: highway and roadway repair, bridge approach repair, concrete lifting, leveling and void fill. And it’s no surprise that like all NCFI product lines, TerraThane geotechnical foam is quietly changing the way entire industries work for the better.
The American Society for Testing and Materials, or ASTM, No. 57 stone is often used as sub base fill material below road surfaces and buildings. It is a fragmented stone with angular edges and is regularly utilized as a drainage layer when used with geotextile fabric. Although the material is touted by many as "self-compacting," excess voids left from zero compactive effort in locations with little confinement may not eliminate the possibility of future settlement. What happens when the environment above the No. 57 stone causes it to settle?
[Editor] Read on for the answer to this interesting question in the case of settlement of a structure at the University of North Carolina at Chapel Hill. The contributed article by Katherine Witt describes how URETEK Mid-Atlantic used their high-density polyurethane resin to stabilize the No. 57 stone beneath a settled foundation as well as lift the surrounding slab back into place. [/Editor]