The Henchman wrote:
A few weeks ago I posted a question regarding getting rid of ceramic
tiles. Thanks to all who posted their answers. I appreciate it. I
elected to use a hilti and floor scraper.

Now my problem is getting rid of the dry glue and dealing with the
cement floor.

This is a basement hallway and bathroom that will have heavy foot
traffic. I am having a really tough time getting the glue up. It's
yellow in color. I tried Maurtic acid, brute force, heat guns, with
tile scrappers, sanding, steel brushes. The only way I can soften it
up a bit is steam from a wallpaper steamer and scrape but it needs
several minutes of steam and then it only gets some of the glue up.

The new floor is a floating vinyl tile floor (15 1/2" tiles) called
Dura Ceram. it has a powered limestone base and textured vinyl
coating.
How smooth does this floor have to be for the floating vinyl. I
can't get all the glue up and I have to re-epoxy or recoat the floor.
Can I leave the glue in place, smooth out any trowel marks and ridges
as best I can and also can I even re-epoxy over this glue or does all
this glue have to come up.

When using vinyl tile, think of the fairy tale of "The Princess and the
Pea." The least little thing will cause a bump in the tile (eventually). It
may not be reasonably possible to get sufficient stuff off the floor without
resorting to some sort of grinding technique.

If it was me, I'd just bury the corpse, so to speak; cover the stuff with
quickset or floor leveling compound.

Afterthought: As you're trying to remove the existing nastiness, application
of COLD might help. Buy a 25# block of dry ice, place it on a section of the
floor, let it sit for a minute. Move the block of dry ice to the next
section, and chisle away the frozen crap. Move to the next section.

Never tried it, but it would be a fun experiment.