Specialty grouting strengthens target areas in the ground and controls ground water flow through rocks and soils by reducing their permeability.

Specialty grouting is applicable to both new construction projects and to repair and maintenance work. Other applications include excavation support, settlement control and geo-environmental products such as diaphragm (slurry) walls to protect adjacent ground from contamination. Common techniques include compaction grouting, jet grouting and fracture (compensation) grouting. Particular techniques developed by Keller include Soilcrete jet grouting, which enables grouting to be applied to a very wide range of soil types compared to traditional methods, and Soilfrac compensation grouting.

Compaction grouting

  • When low-slump compaction grout is injected into granular soils, grout bulbs are formed that displace and densify the surrounding loose soils. The technique is ideal for remediating or preventing structural settlements, and for site improvement of loose soil strata.
  • Compaction Grouting

Soilfrac compensation grouting

  • Soilfrac® is a process used to control or reverse the settlement of structures. It consists of the injection of material into the soil between the foundation to be controlled and the process causing the settlement. The material injected is forced into fractures thereby causing an expansion to take place counteracting the settlement that occurs or producing a controlled heave of the foundation.
  • Soilfrac Compensation Grouting

Jet grouting

  • Jet Grouting is an erosion/replacement system that creates an engineered, in situ soil/cement product known as Soilcrete. Effective across the widest range of soil types, and capable of being performed around subsurface obstructions and in confined spaces, jet grouting is a versatile and valuable tool for soft soil stabilization, underpinning, excavation support and groundwater control.
  • Jet Grouting

Latest results

Register for alerts

Keller at a glance


staff world-wide in more than 40 countries


Keller at work

Worldwide contacts

Keller is in over 40 countries across six continents

From our history


Keller is established


Keller acquired Hayward Baker (US)


Keller IPO on London Stock Exchange


Acquired Mckinney (US)


Acquired Piling Contractors (Australia)


c.10,000 employees, Acquired Bencor (North America) and Austral (Australia)