Cob lime-stabilized cob

[Will Firstbrook WCB of BC]

Hi Frank,

There was a discussion of this in Nov 1996 on the coblist. There was a
listing about two types of hydrated lime. ASTM C207 Type N & Type S.
Type S is superior as it has a limit on the oxide content in the lime
where as the N type has no limit. The oxide is what causes the lime to
swell when wet. I wonder if Hydrated means low rated expansion when wet?

Lime putty is a mixture of Hydrated Lime (N) or (S) that is soaked in
water for a week or more till it becomes plastic like.  One recipie
recommended 5 bags type N lime in 55 gallon drum of water ,mix well and
let set for a week..

Regards,
Will



>-----Original Message-----
>From:	Frank Duffy [SMTP:frank at chimney.demon.co.uk]
>Sent:	Tuesday, February 24, 1998 12:44 AM
>To:	coblist; WFIRSTBR
>Subject:	Re: Cob lime-stabilized cob
>
>
>Michael,
>
>It certainly is of interest.  Thanks.  But can you tell us whatare the
>differences between hydrated lime, non-hydraulic lime and lime putty?
>
>Thanks again.
>--
>Frank Duffy
>