Concrete lifting, or slabjacking, comes at a fraction of the cost of a slab tear-out and replacement. And this repair method is also faster, easier and more effective. It works to restore just about any type of sunken slab, including sidewalks, driveways, patios, porch steps, pool decks and garage floors.
But how, exactly, does concrete lifting work?
In general terms, the repair involves filling air pockets in the soil under a sunken slab and using pressure to raise it into the proper position. But the more details of the slabjacking process requires a bit more explanation.
Small Holes Are Drilled in the Sunken Slab
The slabjacking process starts with drilling a series of small holes in the concrete, each roughly two inches in diameter. Placement is carefully planned, as the holes must align with the air pockets under the slab.
Professional slabjacking contractors drill only the number of holes needed, which varies depending upon the size of the project. Sometimes, the holes can be hidden within the concrete cracks or grout lines.
Cement Slurry Is Pumped Through the Holes
When the drilling is done, professional contractors mix up a proprietary cement slurry. Typically, this contains cement, water and fillers like dirt, sand or limestone aggregate.
Next, the contractors fit a hydraulic pump into the drilled holes and use it to deliver the cement slurry through the sunken slab. The mixture spreads to completely fill the air pockets and stabilizes the soil. When the pockets are filled, the resulting pressure raises the slab back to its original position.
Caulk Is Applied to the Holes & Concrete Cracks
Once the sunken slab has been raised, professional slabjacking contractors wipe up any spills and fill the drilled holes with fresh concrete.
Caulking is the final step to the slabjacking process. The holes and concrete cracks need to be sealed to prevent water penetration. Applying caulk can be a do-it-yourself job, but many homeowners and businesses choose to let professional contractors handle the task.
For an experienced Michigan Concrete Lifting Service, please contact Creative Concrete Raising at (866) 724-7348 for a free quote.