Concrete Slab Pinning / Pea Fill
To prevent against concrete cracks, tilting or settling, use pea fill around your concrete foundation. Pea fill is a mixture of coarse sand and pea gravel that is perfect to use for large, empty spaces because it compacts and eliminates air space. If you're building a new home, and you don't have this around a slab of concrete that comes in contact with your foundation, you can always pin your slab following these pointers.