welding 3d printing ...It seems more like a game ... when I was a teenager
during the summer job I did the welder ... it was fun to do this kind of
game ... obviously we never did a bridge ... otherwise the Boss would find
out!! ... I see it hard to do any kind of control that is not damaged by
sparks and fumes ... maybe the most futuristic thing is to use the gas of
the welding machine itself ... but this would eliminate the sparks only at
the cost of a disuse of gas. .. and the finishes would remain questionable.
bkt
2017-06-21 20:10 GMT+02:00 BRIAN GLACKIN <***@gmail.com>:
> The name "concrete" is misleading. The paste is more of a grout using fine
> aggregates whereas concrete typically has coarse aggregates. With the
> absence of coarse aggregates, the vibration requirement is minimized. As
> for reinforcement, simple paste as shown would be weak indeed unless they
> are adding fibers to the mix (glass, polyester, metal are typical) which
> would be likely in this case although not stated. The "laminations" would
> likely impart some strength as well.
>
> As for fireproof, the structure has little in it (other than furnishings)
> that would be combustible.
>
> A final concern is the strength of the mix. Typical cement mixes achieve
> ~15% of their strength in 24 hours (full strength in 28 days). Again
> additives or high early strength mixes could be used which could solve
> that. Either way, I would want the structure to fully "cure" prior to
> moving in. That means for me waiting a month no matter how fast they print
> it.
>
> I find the technology interesting and in certain circumstances could be
> useful for developing structures in remote areas where transporting
> pre-engineered structures and or components might be cost prohibitive.
> Apic Cor has a video of them printing a "house" and how they reinforced and
> insulated the structure for -35C conditions. Kinda smallish but it can
> easily be nested with other units to create office/work and or living
> spaces.
>
>
>
> On Wed, Jun 21, 2017 at 11:49 AM, Nicklas Karlsson <
> ***@gmail.com> wrote:
>
> > > 3D concrete printing
> > >
> > > https://www.youtube.com/watch?v=zb3zuk1qNDk
> >
> > Without rebar and vibration concrete will be weak, maybe it's good enough
> > for a real firewall?
> >
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