Help! its blue cement pvc pipe glue...
The only thing I have ever found that cuts pvc glue is acetone. I use that to get it off my hands, but never have tried to get it off cement. Have you tried scraping it with a razor blade? G.L.
if the cement is for a sidewalk for driveway and does not have paint or coatings you can use a the rough side of a brick. You can use the same method for concrete /morter / paint splatter / glue and caulking.