When concrete begins to crack and settle, there are two ways to handle the problem. Either replace the slab entirely or raising the slab by pumping a slurry-like mixture underneath in a process called mud jacking. Mud jacking is also known in the industry as slab jacking, and slab raising. Mud jacking is popular as it is a much more efficient and cost-effective way to level out settled concrete.
Mud Jacking has its pitfalls as well. Considering how heavy the slurry mixture is when mud jacking, the potential for the slab to fall even farther exists if the ground underneath is not entirely stable. The weight of the mixture, added to that of the existing slab can further complicate mud jacking.