ABSTRACT
Grouting of rock and soil mainly serves for sealing and stabilization. Grout materials may be made of Portland cement, blast-furnace cement, finely ground grouting cement and ultra fine cement. The degree of pore filling and the water content of the suspension at the beginning of hardening determine the quality and the life of the grouting zone. A low sedimentation rate improves the workability of a suspension and favours its behaviour in the sense of grouting techniques. Pastes demand careful colloidal processing and increased pressure for supply and grouting. The permeability of the grouting zone as a whole depends on the degree of pore filling. Strength development related to the time after start of hardening is of interest for grouting zones to be excavated and then fully loaded, as for instance underpinnings. Actual data are rarely known since grouting at extreme temperatures is a rare case and many experiences remain unpublished.
