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Pouring Concrete in Highrises

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Pouring Concrete in Highrises Warm Worm 08-08-2008
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Posted by Warm Worm on August 8, 2008, 2:24 pm


When concrete is poured into the rebar molds and dries(?), what
happens to the next batch of concrete the next day on top of the
previous concrete-- specifically at the juncture between the two? Is
there a crack and/or weak spot? Is the old concrete wet enough and/or
new concrete heavy/wet enough to somehow merge and form a complete
bond?

AppliancePartsPros.com, Inc.
Posted by gruhn on August 10, 2008, 3:21 pm


There is an approach called "continuous pour" that iiuc is all about
making sure the previous batch and the next batch get confused and
think they are part of the same piece of concrete. Let me poke the web
and see what it says... iirc St. Louis arch, CN Tower... that sort of
thing, benefit from this tech.

Right, that bit of research didn't help. And my books are all packed
up right now. Maybe somebody else can add real info. Talking about
moving/crawling/walking forms might be interesting too, hint hint.

Posted by Warm Worm on August 11, 2008, 3:30 am


> There is an approach called "continuous pour" that iiuc is all about
> making sure the previous batch and the next batch get confused and
> think they are part of the same piece of concrete. Let me poke the web
> and see what it says... iirc St. Louis arch, CN Tower... that sort of
> thing, benefit from this tech.
>
> Right, that bit of research didn't help. And my books are all packed
> up right now. Maybe somebody else can add real info. Talking about
> moving/crawling/walking forms might be interesting too, hint hint.

Slipform: http://en.wikipedia.org/wiki/Slipform-- concrete extrusion.
Cool...
I think that's kind of how spider-webs work too...
"Although silk is produced as a liquid within the silk glands, it
usually emerges from the spigots (as the spider moves away from an
attachment point or pulls the silk out with its leg claws and
bristles) as solid silk fibres. Different parts of the silk gland
secrete different types of proteins (spidroins) into the gland cavity.
These form an inner core and then outer sheathing layers. The very
viscous silk flows as a liquid crystal fluid through a long,
progressively narrowing duct whose lining cells extract water from the
protein. It is then subjected to a mild acidic bath and increased
pulling stress which help convert the liquid protein into a solid
fibre."
-- http://www.amonline.net.au/spiders/toolkit/silk/factories.htm

=2E..http://cannabis.net/drug-webs.html
I think I'll try extra-hard this week to quit caffeine.

Posted by Warm Worm on August 11, 2008, 5:24 pm


>
>
>
>
> > > There is an approach called "continuous pour" that iiuc is all about
> > > making sure the previous batch and the next batch get confused and
> > > think they are part of the same piece of concrete. Let me poke the we=
b
> > > and see what it says... iirc St. Louis arch, CN Tower... that sort of
> > > thing, benefit from this tech.
>
> > > Right, that bit of research didn't help. And my books are all packed
> > > up right now. Maybe somebody else can add real info. Talking about
> > > moving/crawling/walking forms might be interesting too, hint hint.
>
> > Slipform:http://en.wikipedia.org/wiki/Slipform--concreteextrusion.
> > Cool...
> > I think that's kind of how spider-webs work too...
> > "Although silk is produced as a liquid within the silk glands, it
> > usually emerges from the spigots (as the spider moves away from an
> > attachment point or pulls the silk out with its leg claws and
> > bristles) as solid silk fibres. Different parts of the silk gland
> > secrete different types of proteins (spidroins) into the gland cavity.
> > These form an inner core and then outer sheathing layers. The very
> > viscous silk flows as a liquid crystal fluid through a long,
> > progressively narrowing duct whose lining cells extract water from the
> > protein. It is then subjected to a mild acidic bath and increased
> > pulling stress which help convert the liquid protein into a solid
> > fibre."
> > --http://www.amonline.net.au/spiders/toolkit/silk/factories.htm
>
> > ...http://cannabis.net/drug-webs.html
> > I think I'll try extra-hard this week to quit caffeine.
>
> Here's one that was fed Big Macs...http://www.telegraph.co.uk/news/worldn=
ews/1572474/Spider-'attacks'-Na...

Corrrect.

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