|
It's probably cracked from shrinkage, which is normal. Concrete doesn't have much strength in tension. Large slabs are ordinarily sawn to a shallow depth every x feet in both directions to try and control where the cracks occur but this doesn't always work. Rebar in the slab won't matter; it will still crack.
I wouldn't worry about it. The important thing is how well the water in the soil is controlled. You want the area around and underneath a basement well drained.
JR
|