Cob: lime and pozzolans

[PJ Benet-Davis]

Hi!  This is P.J. (the lurker) here.  Want desperately to build with cob and maybe reinsulate an old trailer.  I've gotta say - - Hey guys - this morning in a treasure trove of wonderful material.  However, I have mentioned this to Cat and have wondered about how to overcome the problem of my not being able to print anything Cat sends.  Is anyone else having this problem?  

>>> "Amanda Peck" <ap615 at hotmail.com> 01/30/03 08:37PM >>>
Pozzolans is the technical term for the additive.  Rice husk ash is one.  
BUT I winced when I heard them talking about quicklime.  Charmaine will 
undoubtably chime in with information here.  Well aged lime putty is the 
usual base for lime creations--and truly well-aged can be generations, not 
hours, days or weeks. Quicklime is DANGEROUS!

Here's a random link:
http://www.buildingconservation.com/articles/pozzo/pozzo.htm 

"Materials which enable lime mortars to set more rapidly include ash and 
brick dust. Known as 'pozzolans' after the volcanic additives used by the 
Romans, these materials are widely found in the lime mortars used in old 
buildings and monuments."



Cat and the rest of us want a roman bath!
And the friends nearby to help us use it.
And someone else to do the work of maintaining it.


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