G4_New Foam Pushes Up Sunken Concrete (Approaching)_02
Currently, there is a new method that is cheaper and easier than both mudjacking and replacement. This new method uses a chemical reaction to lift concrete slabs. This new process is called foam injection.
Injecting the foam is similar to the process of mudjacking. Small holes about the size of a dime are drilled through the concrete slab. The chemicals are injected into the holes. Within 30 minutes, the slab can support the weight of a car.
As you may recall from Science class, there are clues to chemical changes. One of those clues is the formation of a gas. When the foam is injected, the chemicals mix. During this mixing, a gas is produced that expands the foam. This expansion lifts the concrete slab back into place.
The chemical reaction does all the work. There is no need for high-pressure equipment.
What happens when tree roots have pushed up a concrete slab? You can ignore the problem if it is not too bad. One solution is to replace the area with new concrete. Simple mudjacking is another way to do it. Thanks to some cool Science, foam injection may be the cheapest and easiest way to go.