Concrete Basement Stairs Covering

http://keeganfyld985.unblog.fr/2019/06/24/this-is-your-brain-on-house-slabs-melbourne-calconstructions-com-au/

The concrete pumped into a crawl area has more water added to it so that the concrete can self level itself. Choosing to have damp, permeable concrete set up in the crawl area is like including 300 lbs of water