CreteMaster.com

CreteMaster.com Repairs Sinking Concrete by Jacking/Lifting the Concrete!!! Concrete Jacking also known as Slabjacking or Mudjacking, is a specialized environmentally friendly concrete repair technology. In essence, slabjacking can lift a sunken concrete slab by pumping an organic grout using hydraulic pressure through holes drilled in the concrete slab, effectively pushing it up from below. Accounts of raising large concrete slabs through the use of hydraulic pressure date back to the early 1900s. The slabjacking process generally starts with drilling small diameter access holes in the concrete, strategically located to maximize lift. These holes are generally 1 1/2? in diameter for traditional slabjacking applications. Initial material injections will fill any underslab void space. Once the void space is filled, subsequent injections will start lifting the concrete almost immediately. After the slabs are lifted, the access holes are patched and the work is complete.