Sodium Silicate Chemical Grouting

Sodium Silicate Chemical Grouting is the injection of a high viscosity mixture of Sodium Silicate, reactant, and water. Upon injection, the chemical grout material permeates granular soils and quickly sets (hardens), essentially gluing the individual particles together.  The result is a solidified mass of hardened soil, similar in strength to a weak sandstone.  The chemical grout is injected through pipes installed in a predetermined pattern beneath the foundation, slab, or other structure to be supported.  Spacing, depth and injection criteria are designed to form a mass of strengthened soil to increase the bearing capacity or to support an excavation beneath or adjacent to the structure.


  • Only clean granular soils can be treated
  • To strengthen soils beneath existing foundations and slabs
  • Support of excavation for existing foundations and slabs
  • Can be used to control water inflow

Construction Advantages

  • Installed with small equipment that can access tight work areas
  • Can eliminate the need to replace slabs and other damaged components
  • No need to unearth foundation or slab

What to expect

  • Small holes must be drilled through slabs for interior work
  • Monitoring structure for movement.
  • Monitoring of adjacent utilities for grout inflow