Slab jacking is the process that can raise a slab back to its original position by pumping a mixture of sand, cement, and other additives beneath the slab. The most common reason why slabs may sink, can be a result of poorly compacted fill under the slab, sub-surface erosion, or shrinking soils.

The slab jacking process is usually performed with the same type of equipment as the cementitious pressure grouting. Holes are drilled on a grid pattern in the concrete slab to reach the void under the slab. With the help of special pressure connectors (packers) the grouting equipment is connected to the holes. Grout is pumped under controlled pressures in a sequential manner in each hole until the slab is lifted back to its original elevation.

Applications:	Buildings, Pulp and Paper Industry, Chemical Plants, Grain Terminals, Food Processing
Benefits:	Restores floor to original position Cost effective repair Quick process, minimizes plant downtime Performance of the repair visually proven

See also:
Cementitious Grouting
Epoxy Injection
Chemical Grouting