[Zeke]

Nothing like a bunch of car enthusiasts weighing in on how to remove concrete. Like the one comment about using a lawn edger with a diamond blade. Seems to me I might have tried that when I was like 14 or so and found out the thing didn't have enough weight or HP behind it to cut plastic.

If the slab has any reinforcement in it, especially going into the walls, you will have to break it out in chunks. I try to cut through any concrete all the way cutting all the rebar and mesh. I always pry and lift out the biggest pieces I can transport once it is free.

I broke concrete into rubble twice in my long construction career, one time in a basement where it was tied with mesh and the whole thing had to come out and once on an outdoor patio which was the biggest mistake of all. The next week I saw a front loader take up a 20' by 20' driveway in less than 10 minutes.