There are numerous chemical grouts in use today.
Sodium silicate is the most commonly used structural grout for clean, sandy soils.
The silicate mixture is injected and permeates the soil resulting in a hardened mass similar to a soft sandstone. Excavation support for major addition at Orange County Civic Center. Excavation was 12' beneath existing structure Orange County, FL Soil Beneath existing foundation stablized with silicate grout Bay Hill, FL Ink room addition at the Orlando Sentinel. Grouting at the initial elevation will continue until the pressures indicate sealing of limestone is accomplished. Once the limestone is sealed, grout injection will continue as the pipes are slowly withdrawn thereby displacing, recompacting and reconsolidating loose soils above the limestone.