This is a very clean source of material and works well on the top of Central Florida “Sugar Sand”.  Typically Broken Tile is about the size of a deck of cards.  This material has not been on a roof, but is the same material.  Broken Tile supports itself well on bare ground and makes an excellent road/driveway when topped with Crushed Tile.  There may be a little plastic from the bands that hold the tile on pallets, but nothing that would affect tire or pedestrians.