How Concrete Slabjacking is Done
Related Links: What Causes Foundations and Slabs to Sink? Warning Signs of Foundation/Slab Failure Methods of Repairing Sunken Concrete Correct Method: (Slabjacking or Piering?) Foundation Supports ("Piling" or "Piering") Typical Steps in a Piering Installation Slabjacking (also "mudjacking") How Slabjacking is Done A pattern of holes typically between 1-1/2 and 2 inches are drilled or cored through the sunken slab. A grout mixture is pumped under low pressure (about 10 PSI) under the slab using a 2-inch hose with a nozzle that fits into the holes. Once any cavities or voids are filled, the grout becomes pressurized, hydraulically raising the slab to the desired height. The grout is typically comprised of water, Portland cement, Bentonite or flyash and sand. Additives are used to prevent shrinkage. The drilled holes are patched using a concrete mixture. Find a Concrete Contractor 24 Services in 221 Metros -- U.S. and Canada 
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