h a l f b a k e r yactual product may differ from illustration
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New way of constructing formworks for concrete structures.
This idea consists of a huge 3D printer. It has all the elements of
an ordinary 3D printer. Just like one of these machines:
see the '3D printers' link below
But over 50 times as large. So the plastic sausage that comes out is 50
times as
large as well.
This machine is capable of printing structures that can replace the conventional
formwork needed for casting concrete.
This printer can print very complex formworks which are filled with special fiber reinforced concrete or 3Dprinted metal reinforcements.
In this way an unprecedented design freedom for concrete buildings can be achieved at lower costs.
Not only complex but also relatively simple structures like bridges and tunnels can be constructed
this way.
If the concrete is cured, the plastic mold can be removed. The remains of the plastic are then
shredded.
These granules can be upcycled as new raw material for the 3D printer to create a new formwork for a new project building project somewhere else.
3D printers
http://www.craftsma...d-instructions.html
[liquid98, Jan 11 2013]
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Annotation:
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I think we did this before, but printing the concrete
directly rather than printing formwork. |
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Did not know that, DrCurry. Can you point me some pictures
? |
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Forms are usually wood or reinforced polystyrene. For a 3D printer the latter could be brought to the site in compressed (non-aerated) form. |
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A bit of reshaping afterwards and the foam could be instantly reused as insulation. |
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I think this would be great for making otherwise flat surfaces ornate. |
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I don't think your printer would need to be as large as
you described. The actual framework is normally built
with 2x4's or 2x6's so a 3 inch by 7 inch machine
should be big enough. Like a meat grinder, with
plastic inside; as the fame work is extruded,
manipulators can make surface changes and folds as necessary. |
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"Print" formwork from fast-setting pure cement mix. Then fill the
void with concrete. Et viola. |
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Pure cement lacks strength... it's too friable. You
need to add fibres or sand or aggregate to the mix or
it will simply
crumble. |
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