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Brian,
Did your consultant mention anything about using microspheres in place of
sand or at least a portion of it to reduce the weight? Did he mention
air-entrainment? Both methods increase the strength and durability as
well.
Jim
In a message dated 3/9/2011 8:39:45 A.M. Central Standard Time,
ojaivalleybeefarm@dslextreme.com writes:
The figure I was using to calculate the weight was 12lbs per square
ft. , that was suppose to be the high end of an average wieght figure
form the ferro-cement boat book that I've been using. The sand that I
used was reccommended by a concrete consultant as the best because of its
hardness, it was blasted from granite. So I think the sand I used was
quite a bit heavier than your run of the mill river sand. And I have
heavy duty ribs every 18 inches on the inside of the structure along with a
liberal amount of concrete in the area where the two halves
meet. So I'm looking on the bright side of this, I'm simply going
to add more volume ! , which I don't mind doing, I have played around with
this "contingency" design anyway, the only reason was not going to do it was
because of the extra cost. I figure I need an extra 50 cubic feet or so
to cancel everything out. More room to move around in!
Brian
On Wed, Mar 9, 2011 at 12:32 AM, Marc de Piolenc <piolenc@archivale.com>
wrote:
To what do you attribute the
error?
Marc
Archivale catalog: http://www.archivale.com/catalog
Ducted fans: http://massflow.archivale.com/
Polymath weblog: http://www.archivale.com/weblog
On 3/9/2011 12:03 PM, ojaivalleybeefarm @ dslextreme.com wrote:
Hi All,
Remember when I said I calculated my ferro ballast
superstructure at
around 4000 lbs (on land), well I was off by a factor
of 1.75, She
wieghed in at around 7000 lbs. I wieghed the beast this
morning
on the truck scale in the yard where I am. So I looks like I
may
be adding another room on the back! At least I don't have to
buy
any
lead.
Brian
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