A couple of days ago I used some Mortar Mix (Sakrete or Quikcrete or similar) liberally dosed with Acryl 60 to parge the front of my house and repair some broken-out between-the-bricks mortar. The repairs are just now getting hard to the point where I can rub the surface and not rub off the mortar. Further the result seems excessively "sandy" although the mix looked normal. Whether this affects the final quality of the repairs remains to be seen.
The (opened) bag I used was at least five years old (maybe even ten) but the contents, although not flowing like...oh, flour...had only a few lumps which were easily broken up in the mixing process. I've used similarly old concrete mix without any problem but I wonder if there's something unique to mortar mix that causes a problem with age. Unlike shellac (for ex.) there's nothing on the container to indicate a useful life. I'm sure if asked the mfg would blame the consumer so that's pretty pointless.
Has anyone had a similar problem?