Use a drill equipped.
Fill void under concrete steps.
Filling in under your steps is an important step to prevent not only pests but also seepage into your foundation through small cracks or openings that may be hidden from view.
This mix of sand cement and water is pumped through holes drilled to fill up the voids.
How to fill voids under a concrete slab step 1.
Geo polymer void filling is the best method we currently have for void filling but it cannot affect deeper layers of un compacted fill so you are left with supporting and densifying through polymer injection.
Drill at least four holes through the slab at a point that s centered on the void beneath.
Once the holes have been set the geolift is injected in between the concrete and the dirt.
A sand cement grout can be used to fill voids under concrete slabs.
A sono tube is a cardboard tube available at home depot.
It seems to me that i need to remove the gravel and fill the void with dirt and pack it in as tight as i can get it.
Holes should be no less than six inches away from the edge of the concrete.
The grass will eventually fill in.
The first step is to drill holes in the problem concrete.
1 what material should i use to fill the void under the porch.
Use a hoe or fabricate a pushing stick and stuff the concrete into the crevice.
You might need two bags.
Once it hardens use some soil around the low spots and slope it away from the steps packing it down firmly.
I would fill the area with concrete stone mix.
The foam will fill up the parts of the concrete that are uneven and will raise it to the proper height.
Quickcrete concrete mix is also available at home depot.
Mix the concrete to a thicker consistency.
Smooth it out on the outside.
2 there is currently a few inches of gravel under the porch.
Immediate replacement of settled concrete or concrete with voids is not a good choice as settling is not yet complete.
While this method of slab jacking is cost effective there are major drawbacks to opting for this type of repair.
Connect a hose to a slabjacking pump then run the hose to the holes leading to the void.