SLABJACKING
Slabjacking is an alternative to replacing an entire concrete slab. Operators can float a slab back to its original position by pumping a mixture of sand, cement, fly ash, and other additives beneath the slab.

They drill strategically placed holes into the slab. Using a portable pump and flexible hoses, they fill the holes with the special mixture.

Benefits of slabjacking:
Performed in virtually any weather.
Little or no disruption to landscaping.
Nothing needs to be removed from the slab, as the pump can lift the weight of the slab and anything you have placed on it.
Takes little time.