stormwater sinkhole repair

Polyurethane Grout for Ground Improvement

Geotechnical Polyurethane Grout

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Polyurethane grout for ground improvement is the application of plural component geotechnical polyurethanes to increase the density and stability of in-situ soils. Polyurethane grouting for ground improvement has been in use in United States since the 1950’s. For a period from the 1990s to the 2010’s the use of plural component geotechnical polyurethane grouts was largely covered by patents held by Uretek. The patents have since expired. The process is in use in lieu of cementitious grouts for the following applications throughout the United States:



Time is money.  Minimizing downtime and speeding return to service is a key benefit of choosing CJGrout polyurethane grouts.  Unlike high mobility cement-based grouts which may take hours, if not days, to accept traffic, CJGeo’s polyurethane grouts can take traffic within minutes of placement.  Even rail traffic.


Settlement usually starts with poorly consolidated underlying soils.  CJGrout polyurethane grouts are significantly lighter than traditional cement based grouts, but still provide excellent bearing capacities.  Using polyurethane grout decreases the burden on underlying soils. This helps to reduce the likelihood of resettlement from increases in dead loads.  The half life of geotechnical polyurethanes is generally greater than 150 years.

CJGrout Polyurethane Grout Systems

These are some of the most common CJGrout polyurethane grout for ground improvement systems that CJGeo uses.

SystemIdeal Use
20FDSSprayed applied above grade lightweight fill
20SDBPoured or injected mass void filling
28FDLLight duty differential settlement correction
35NHV61Leak stopping, wet environment void filling & compaction grouting
40NHLMedium duty differential settlement correction & compaction grouting
48NHLHeavy duty differential settlement correction & compaction grouting

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Facing a challenge related to polyurethane grout for ground improvement? Give us a call or send us an email by clicking on the state marker to locate the Preconstruction Manager that services your area.