Strawbale Archive for June 2002

> Willy,
>
>  Lime (Calcium hydroxide)  is not corrosive to metals except lead......or
to
> anything else.....exception is Calcium Oxide, where the heat generated
when
> mixed with water to make putty, whitewash,, etc, is sufficient to burn the
> skin....from the heat, not from chemical action.....
>
> Some Hydrated lime bags do carry warnings due to the fact that some of the
> dry  hydrated lime powder may contain un-hydrated calcium oxides...Once
mixed
> with water and aged, all the oxides react, and then is no longer corrosive
> due to the heat generated when reacting with water....
>
> Lime water was regurlary used as a mouth wash, is the liquid in calamine
> lotion, etc..NOT CORROSIVE, and fed to babies for calcium supplement and
> upset stomach, etc.
>
> Quicklime is listed as a corrosive substance because when mixed with water
it
> generates quite a lot of heat ( and this classification ONLY APPLIES to
the
> transport of quicklime by airplane). Once fully slaked into hydrate putty,
it
> is no longer listed as corrosive. It will remove oil from the skin tho,
and
> allow the skin to become irritated due to loss of moisture and oil...So
use
> gloves and hand lotion when messing with lime putties, stucco, etc..
>
> Cements are often corrosive as they generally contain soidum and potassium
> hydroxides and chlorides ( Corrosive materials), derived from the clay or
> shale used im making the cement.
>
>
> Harry Francis
> Blacksburg, VA.
>
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