Make a wood frame about six inches high and a little bigger than an
individual tile. Place the frame on a tile and fill it with dry ice. You
will hear a pop when the glue releases the tile. The glue has frozen solid
and losses its grip. Use a long handled scrapper to move the tile off the
floor. It will not really need scraping, just something to move it. You
might be able to remove a good deal of the adhesive with the scrapper before
it thaws out.

I've seen a flooring operator remove all tile, quite cleanly, from a 10'
X 10' area in less than thirty minutes without breaking a sweat. He got
most of the glue as well at the same time. It is also safer than using heat
which might generate fumes and, of course, there is no fire risk.

Good Luck.

"M.Burns" wrote in message
news:WKaSb.2549$CJ1.468@lakeread01...
What is the best way to remove some very old tile from a concrete floor?
Where tile had been wet or had something sitting on it, some tiles are
already loose and pop up. But on most of the floor tile is still firmly
attached with what appears to be a black adhesive. The hammer and chisel
routine just brings up 1 to 3 inch square chunks. Tile is the plyable
stuff
..not ceramic. Also 12x12, not the 9x9 asbestos.
Any ideas for something faster?