Smooth it out on the outside.
Fill void under concrete steps.
A slabjacking pump is.
A sono tube is a cardboard tube available at home depot.
Holes should be no less than six inches away from the edge of the concrete.
2 there is currently a few inches of gravel under the porch.
The grass will eventually fill in.
Quickcrete concrete mix is also available at home depot.
The first step is to drill holes in the problem concrete.
Should it be removed or do i add the void filling material directly on top of the gravel.
Once it hardens use some soil around the low spots and slope it away from the steps packing it down firmly.
Immediate replacement of settled concrete or concrete with voids is not a good choice as settling is not yet complete.
I would use an 8 diameter sono tube cut to 30 which is your frost line fill it with quickcrete concrete mix.
Use a drill equipped.
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.
Drill at least four holes through the slab at a point that s centered on the void beneath.
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.
A sand cement grout can be used to fill voids under concrete slabs.
Once the holes have been set the geolift is injected in between the concrete and the dirt.
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.
I would fill the area with concrete stone mix.
While this method of slab jacking is cost effective there are major drawbacks to opting for this type of repair.
Use a hoe or fabricate a pushing stick and stuff the concrete into the crevice.
1 what material should i use to fill the void under the porch.
This mix of sand cement and water is pumped through holes drilled to fill up the voids.
You might need two bags.