"ARWadworth" wrote:

I also have a path to concrete. Foot traffic only and it will eventually
have paving slabs on top. I might buy new cement for the posts and use the
old stuff for the path. It has been stored indoors not a shed and seems to
be in good condition.


Cement is incredibly hygroscopic - meaning it powerfully absorbs
moisture. Even if kept indoors, there is always moisture in the air
and cement will absorb it and partially hydrate. If you leave a bag
of cement long enough it will almost completely hydrate and you will
be left with one large lump - cement bags do not include an effective
barrier to moisture.

Cement is not ridiculously expensive, so I would recommend that you
replace it with new.