Containment, Stabilization and Treatment of Contaminated Soils using Insitu Soil Mixing

Soil Mixing is a technique that has increasingly been relied upon for the insitu remediation of contaminated soils. Depending on the application, large or small diameter (4 to 0.3 meter) mixing augers can be used to inject cement, bentonite or other reagents to modify soil properties and thereby remediate contaminated soils and sludges. A major advantage of the method is the capability to treat soils at depth (up to 35 meters deep) without excavation, shoring or dewatering. Recent advances in soil mixing technology include lower permeability additives for groundwater barriers, additives for the fixation of waste-contaminated soils and combination of soil mixing with hot air injection and vapor extraction technology to remove volatile organic chemicals.