Hello.
I have a pallet of mortar that has been outside under a tarp for a few years.
Some of the bags are made of paper, where the mortar is rock hard, but some are made of plastic and still feel okay.
How do you know if it's okay to use?
/ Regards, Fredrik
I have a pallet of mortar that has been outside under a tarp for a few years.
Some of the bags are made of paper, where the mortar is rock hard, but some are made of plastic and still feel okay.
How do you know if it's okay to use?
/ Regards, Fredrik
I found an opened paper sack in my stash that was at least 10 years old. I used what was in powder form or what could crumble into powder, and it became rock-hard concrete after I mixed it with water and let it cure.
If you're concerned, you can mix a small test batch and try it first.
If you're concerned, you can mix a small test batch and try it first.
Use older than a year can cause allergies during use. There is an additive that disappears, the additive is meant to reduce the risk of chrome allergy.
I don't know how the durability is affected, but if they are important constructions, I wouldn't take the chance.
I don't know how the durability is affected, but if they are important constructions, I wouldn't take the chance.
Exactly, the expiration date is for how long the manufacturer can guarantee that the amount of hexavalent chromium is kept within guideline values. Hexavalent chromium is not to be trifled with, so wear a respirator, gloves, and protective clothing if handling old concrete/mortar. However, maybe it's not a big deal every once in a while...H HSP said:
Concrete products, in general, last and work well for a long time as long as they are stored dry.