How do I remove dried thinset mortar that held down ceremic tile from a concrete floor?
Answers:
Not so easy. However, you can get a diamond embedded grinding wheel for a big angle grinder that works pretty well; lots of dust though.
Other answers:
Unfortunately,the only way seems to be scraping it off.
Unfortunately,the only way seems to be scraping it off.
Go to your local rental store and get a chipping hammer, if they have a thinset blade, all the better.