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Subject:
Re: Usage guidelines for BULLAMANKA-PINHEADS
From:
David west <[log in to unmask]>
Reply To:
BP - "where heavy conservationists hang out"
Date:
Fri, 6 Aug 1999 03:17:18 +0100
Content-Type:
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>>> Ralph Walter <[log in to unmask]> 6/08/99 12:07:34 >>>
wrote: 
"Huzzah for Young Mike Edison!  My only question is, does Jahn shrink 11% or 11/100 of 1%.  Would seem to me that the .11% you wrote, Mike, is pretty negligible."

I'd say 0.11% was correct.  This equates to 0.11mm shrinkage for 100mm length of patch.  Doesn't sound much.  But if you have a 2 foot long patch (600mm), then you get a total of 0.66mm shrinkage (26/1000ths inch), or 0.33mm (13/1000ths inch) at each end.  A crack of this width is easily visible, and certainly wide enough for water to enter.

Cheers

david west

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