On 03/28/2019 10:01 PM, Jac Brown wrote:


"Ed Pawlowski" wrote in message
...
On 3/28/2019 10:44 PM, Jac Brown wrote:


"rbowman" wrote in message
...
On 03/27/2019 10:27 PM, wrote:
As your article says, Florida loves tilt up. It is a fast way to get
to the wind code. They were in love with Y Tong concrete for a while
but it went away just as fast. I am not sure what happened there.
That is interesting stuff (air entrained) it floats.

I wonder if you could adapt it to ferro-cement boat building?

Cant see that working because of the curved hull required.

Not convinced it would work for a barge either, hard to
do the joints.

Duh, its been done
https://en.wikipedia.org/wiki/Concrete_ship

http://www.concreteships.org/ships/ww2/

I wasn’t talking about concrete ships, of course those have been don’t.
I was talking about push up concrete slabs for walls, can't see that
working for a normal ship or even a barge for the reason I stated.

But with 20/20 hindsight when not so early in the morning,
he may have been talking about YTong concrete that floats.
Not convinced about that either because those blocks are
autoclaved and its hard to see how you would make a
viable boat out of concrete blocks. The mortar between
block doesn’t glue the blocks together, its actually just
a way of bedding the edges so they don’t rock or leak.

I was thinking of some sort of molding technique using shotcrete or
gunite. The autoclave part might be technically if not economically
feasible. At least it wouldn't be as nasty as fiberglass with a chopper.