A slabjacking pump is.
How to fill void under concrete slab.
Use a drill equipped.
A sand cement grout can be used to fill voids under concrete slabs.
Connect a hose to a slabjacking pump then run the hose to the holes leading to the void.
How to fill voids under a concrete slab step 1.
Rather than using a mechanical jack as you might with a car soil and other material is used.
Smaller slabs such as walks can be packed with gravel or sand to fill voids but this is not practical for larger slabs such as driveways or patios.
This is a means of filling voids underneath concrete slabs by injecting pumping filler materials into the defective areas.
Slabjacking is as the name might suggest raising up all or part of a concrete slab.
These need a method that supports but doesn t lift the slab.
Drill at least four holes through the slab at a point that s centered on the void beneath.
There are several conventional and alternative void filling materials which can be employed to achieve a similar effect.