Info on Cob cistern and Cob Swauna (sweat:sauna)

[John Schinnerer]

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Aloha,

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From:	Vernon B. Johnston [SMTP:vajohnston at nas.com]
<...The other reason that I am willing to bet it will be fine is the =
synergy created by the use of cement mortar to line the inside of the =
tank.  Not only do I get a decent liner to keep my water in, I get =
increased tensile strength.  Anyway, that is what I decided to line the =
Cob tank with - about a half inch or so of cement mortar, either hung on =
chicken >wire or metal lath.=20

You may be aware of this already, but it is the metal reinforcing that =
provides tensile strength, not the cement/mortar (concrete has high =
compressive strength, very low tensile strength).  I'd recommend nice =
heavy chicken wire or even light concrete reinforcing mesh to be sure of =
plenty of tensile strength - one piece with only one  (vertical) =
seam/joint would be strongest.  By the way, how big is this cistern =
volume-of-water-wise?

John Schinnerer
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