Thinking about the floor inside now.. New slab is 3/4 of the floor and old slab the rest..
My local ReStore has a load of Concrete Tiles, 1 X 1' are 3/8" thick, 1 X 2' are 1/2" thick.. Made in China is all I can find to identify the Mfg.. Looks like they have fibers imbedded in them, you can...