Concrete Floor Grinder Bunnings
https://jasperlepx393.skyrock.com/3324102564-Why-You-Should-Forget-About-Improving-Your-Basement-Concrete-Moisture.html
The concrete pumped into a crawl area has more water added to it so that the concrete can self level itself. Choosing to have wet, permeable concrete installed in the crawl area is like adding 300 pounds of water