Concrete Jacks' foam jacking process works to stabilize and lift settled or unsupported concrete by injecting high density polyurethane foam below the affected area. By choosing between different densities of foam, from 2 pounds per cubic foot to 6 pounds per cubic foot, Concrete Jack can raise and support slabs and structures of all sizes efficently and cost effectively.
Typical installations involve drilling dime-size holes through the surface of the concrete and injecting plural component foam through the holes. There do not need to be voids for the process to work. The components mix at the injection point and travel as a liquid before expanding to push the concrete or structure upwards. Different densities of foam have different rise times, so slabs of all sizes can be repaired. Smaller slabs which are more sensitive to lateral movement of the foam before lift are usually done with a fast reacting foam, whereas larger slabs or those that just need to be void filled under are typically repaired with slower reacting foam.
Some of the repairs Concrete Jack has completed using high density polyurethane foam jacking are:
- 18,000 square foot monolithic driver training slab (up to 7 inches of lifting)
- 2,500 square foot commercial floor (up to 6 inches of lifting and 16 inches of void filling)
- roadway utility cut void filling (free spray from trench into voids under adjacent slabs)
- data center floor (battery rack room)
