Blown plaster question

[peaps]

Lime doesn't stay dry, it soaks in water and then it naturally evaporates, is one reason it was used.

Eh? The evaporation is just the first (and brief) part of the curing process. Thereafter the process is carbonation where the lime (calcium hydroxide) slowly absorbs carbon dioxide from the atmosphere and thus turns into calcium carbonate (which is what limestone is). In this case "slowly" means years and years, which is why lime mortar used by Romans is rock-hard - it has actually become rock. Lime plaster and mortar does NOT wear out - something must have caused it to deteriorate.

I think your point is that while that process is going on, it is still flexible and so is able to absorb tiny cracks - which is why it should be used on old buildings, and one reason why it is wrong to use cement on them.

It's used for it's ability to soak water and evaporate it. Nothing to do with the cure process. Oh it BREATHS

Lime mortar degrades over time, everything does

 

[Possel]

Lime doesn't stay dry, it soaks in water and then it naturally evaporates, is one reason it was used.

I think I see what you meant now: I thought you meant that it was "soaking in water", as opposed to "sucks water in". If you'd used the word breathe" it would have been more obvious to me. I think we agree violently, apart from the question of it degrading over time - it gets stronger as it carbonates, as I explained.

 

[peaps]

Lime doesn't stay dry, it soaks in water and then it naturally evaporates, is one reason it was used.

I think we agree violently, apart from the question of it degrading over time - it gets stronger as it carbonates, as I explained.

You are wrong onthid also.