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Jay, Wilfried, and all,
Since I'm getting ready to plaster my ferro-cement hull soon I'm intrigued by
all thing cement ! I've been investigating some of these large
concrete pipe manufacturers here in California and I'm thinking of having them
do the concrete mix and pouring. (for my big concrete sub) The idea
I have is instead of making a wooden form, inside and out, to hold the
concrete while it is curing, is to instead build a ferro-cement form inside and
out. Then, once the concrete is poured and cured, the ferro-cement
form is simply left in place and becomes part of the sub. This way there
would be no need to remove forms. Another advantage of doing this
would be the interior details could be worked on before the structural concrete
was injected inbetween the ferro cement walls.
Brian
----- Original Message -----
Sent: Wednesday, February 14, 2007
16:45
Subject: RE: [PSUBS-MAILIST] concrete sub
- sand and gravel
Brian,
The quality
of the water is also important. Here in the Bahamas they
use slightly brackish water and their rebar quickly corrodes as a result
resulting in spauled concrete.
R/Jay
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Brian
Cox
Sent: Wednesday, February
14, 2007 12:04 PM
To:
Personal_Submersibles@psubs.org
Subject: [PSUBS-MAILIST] concrete sub -
sand and gravel
Wilfried,
Where you plan to build the concrete sub, what is the quality of the sand and
gravel ? According to concrete experts that I have talked to this is
very important for the ultimate strenght of the cured concrete. For
instance, here in Ventura
California where I live, the
geology of the area here on the coast, the rock here is not good for
strong concrete. I have to make sure I get sand and gravel from the
desert area where there are deposits of granite.
Brian
Cox
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