Driveways, side walks, steps, garage floors, shop floors... all of these are considered to be "flat work" in concrete terminology.  It has been said that concrete will do two things: GET HARD and CRACK. Concrete also settles!


Concrete will settle  because of several conditions. Sometimes the subgrade will get washed away during extremly wet conditions, caused by flooding, rain, poor drainage. over watering of shrubs or other plantings.  Settlement can also occur because of poor or no  compaction of the subgrade material, prior to concrete placement.


Settled or diminished  subgrade material does not always cause the flat work to settle. If this occurs a void is created under the flat work, and the concrete is forced to become a bridge, bearing only on subgrade where it still exsist, or being supported by dowels or piers. When the conditions get to this point the concrete will usually crack because of lack of support. Sometimes these areas support the weight of vehicles, or heavy machinery, and there have been times when the slab fell suddenly because of the massive void, and inadequate support.


Mud jacking concrete is a process of pumping a slurry under the concrete through a series of holes, causing it to raise hydraulically. it can be lifted to it's original elevation, or to an acceptable elevation, once the slurry replaces the subgrade material.


As mentioned above; concrete sometimes only has a void under it, and does not need to be lifted, this void can be filled using the same method as mudjacking, once the slurry has replaced the subgrade material, the pumping ceases. The concrete will now bear on the slurry material, and eliminate bridging of the slab, greatly reducing the potential of cracking.


Contact Alan Russell Construction for a quote on your mud jacking project!