Soil mixing is the process of mixing cement or other binders with insitu soils by means of augers or other specially designed mixing tools.

Soil mixing is one of the most versatile geotechnical construction techniques and is used for a wide variety of applications including ground improvement, tunneling support, support of excavation, hydraulic cut off, and environmental remediation. Depending on the application, the additives that are mixed with the soil may be selected in order to stiffen, to bind, or to decrease permeability.


Key Elements


The mechanical blending of in-situ soils with cementitious materials and other admixtures.


The cement and admixtures are mixed with the soil to increase stiffness; improve bearing, shear and settlement characteristics; and in some cases, to reduce permeability.


To mitigate risk of liquefaction; support and enhance stability of earthen embankments, dams and levees; create stable working surfaces; and bind/neutralize contaminants.

CMC techniques for soil

First panel: Soil mix columns
Second panel: Mass stabilization/shallow mixing

Advantages of Soil Mixing Include:

  • Extremely versatile technique
  • Wide variety of ground improvement, ground treatment, and geotechnical construction applications
  • Relatively free of vibrations
  • Columns and panels can be installed in a variety of configurations
  • Can be used to form stable work platforms for follow-on construction activities

Download our soil mixing technique sheet:

Featured Soil Mixing Projects