advisable storage method of cement?
Not sure I understand the question - Is it a ready mix powder, already mixed and you want to keep it so it can be applied later, or hardened cement that you want to dispose of? if A) Ready mix powder can be stored in any water tight container (bag, box or barrel). B) Mixed powder must be applied before the curing sets in. From the moment you add the water, the curing starts. Curing in cement is aided by water, not by oxygen. So unless you can freeze the mixture, it will be very difficult to slow, much less stop the curing process. So, for all practical purposes, you cannot store cement. Think of curing like a bucket of chain links - at first all the links are separate and you can easily stir the bucket (well, OK - lets assume these are small chain links...). But as the curing proceeds, the chain links connect with each other. So no imagine that you try to stir the bucket of linked chain. Even if the links are only 50% linked (meaning there are still 50% of the links with not even their first link completed) the bucket becomes progressivelyy hard to stir, until eventually you just have a bucket of metal links all attached to each other - You would be able to stir or re-shape it anymore. C) Lastly if you want to dispose of cured cement (say after your done working) it can be disposed of in the regular trash, but many cities like you to bring it to the dump vs having your plastic trash bin suffer the effects of a heavy, sharp-edged object being tossed around in it as well as the safety issue it poses to the trash collection worker.
I know your friend and she (if I'm correct) is very much missinformed as to storage technique. As much as we both love her, (she's a fine lass) toss the advice. Your little friends need open air! There should be a small hook just under the hairline, on the neck, in the back...Find a comfy spot in the sun and hang 'em...they'll love you more for it.