Soil Stabilization

Soil stabilization is the permanent physical and chemical alteration of soils to enhance their physical properties. Stabilization can increase the shear strength of a soil and/or control the shrink-swell properties of a soil; therefore, improving the structural capacity of the soil

Stabilization can be used to treat a wide range of sub-grade materials from expansive clays to granular materials. Stabilization can be achieved with a variety of chemical additives including lime, fly-ash, and port-land cement, as well as by-products such as lime-kiln dust (LKD) and cement-kiln dust (CKD). Proper design and testing is an important component of any stabilization project. This allows for the establishment of design criteria as well as the determination of the proper chemical additive and admixture rate to be used to achieve the desired engineering properties.

Benefits of the stabilization process can include:

  • Higher resistance (R) values
  • Reduction in plasticity
  • Lower permeability
  • Reduction of pavement thickness
  • Elimination of excavation, material hauling and handling, and base importation
  • Aids compaction
  • Provides "all-weather" access onto and within projects sites

Typical material used in soil stabilization can include

Equipment for the stabilization and modification processes includes:

  • chemical additive spreaders
  • soil mixers (reclaimers)
  • portable pneumatic storage containers
  • water trucks
  • deep lift compactors
  • motor graders