What happens to dry mortar when it gets old?

[Dea_34]

I have a bunch of bags of primer A and mortar and plaster C KC lying around that have become ~3 years old (indoors, dry).
What happens to the mortar when it passes the "best before" date?
On coarse concrete I used a while ago, it said that the chromate reduction was only active in the Portland cement for 12 months and that you should not use it after that, but I can't find this information on Finja's packaging.

/Dea

 

[dibb]

The micro-burnt binder using regular humidity. So after 3 years, it is mostly just ballast (sand) left.
A bag that is wrapped in plastic and carefully taped lasts for 12 months, then we usually throw them away.
So the strength in the mortar is gone.

 

[Dea_34]

Thanks for the info, then it will be ÅVC instead.