
Slabjacking is a procedure used to raise sunken concrete. After drilling 1 1/4" holes through the slab, a mixture of mason sand, portland cement, bentonite and water is injected under controlled hydraulic pressure to fill all voids and hollows. Once the voids are filled, the injected mixture "floats" the slab to the desired height. The holes are then cleaned and filled with mason sand and cement. The patched holes will be a different color at first, but given time will blend the the existing concrete.
By carefully controlling the proportions of the slabjacking mixture, we can raise the slab precisely, while maintaining material which will not shrink or settle with time.