[Strawbale] adobe for wet climate

[andre schnabel]

hi there 

I found something about lime (german:kalk):

Lime (CaO) is manufactured from limestone (CaCO3 ) and dolomite (CaCO3MgCO3) by heating in a lime kiln resulting in the evolution of carbon dioxide

Karbonisierung     
wird das Erhärten von Kalken (teilweise auch von Zementen) durch Aufnahme von Kohlensäure der Luft im Gegensatz zum hydraulischen Erhärten genannt.   

the lime CaO reacts with carbonic acid (H2CO3) which evolves out of the natural reaction between CO2 (Carbon dioxid) en H2O (water). which takes place inside the newly plasterd wall.

this process is called carbonisation and hardens the plaster

andre


strawbale at amper....muni.cz schrieb am 06.12.02 14:58:57:
> Carbonisation ! ah !
> Is there a scientific reference/formula of what's happening...
> I don't know what lime is (mixture of clay and organic material-?- No that's
> adobe).... Er... Lime is CaC03 ?
> 
> On 06-12-2002 13:37, "Harald und Margit Wedig" <avantgarden at wxs...> wrote:
> 
> > SVEN AERTS wrote:
> >> 
> >> On 05-12-2002 18:50, "Barbara Jones" <strawbale at lineone...> wrote:
> >> 
> >> I'm a biochemist, can someone tell me what this 'carbonation' refers to ?
> >> I'm trying to imagine what type of chemical transformation you are referring
> >> to... But... Can't think of anything.  Perhaps difference of language ?
> >> 
> >> Sven-Belgium
> > 
> > Hello Sven,
> > when natural lime is burned ( in medieval times a lot of forest was used
> > for this process) it looses its carbon.
> > Once mixed with water and applied to the wall as a render or used
> > between bricks as mortar ( thus drying), the processed or burned lime
> > gets its carbon back from the atmosphere. This is called carbonisation.
> > Harald
> > 
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