Stonework: After the Crash

So I loved this grand stone BBQ when we moved into this place.













But after I found out just how obnoxiously difficult it is to actually cook on, I made plans for its removal. What I didn't know was just how much of the monolith was cement/mortar.  So upon examination prior to destruction, I noticed a crack up the back of the chimney. It took maybe 10 lbs. of pressure to make a 4'x2' slab fall four feet to the ground.  The rest of it came down almost as easily, the tough part being separating the mortar from some of the stone, and clearing the cement pad on the bottom.


Now, what am I to do with all this cement?