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Amalgamma develops new 3D printing concrete technique for large-scale structures – 3ders.org (blog)

by • January 20, 2016 • No Comments

Jan 21, 2016 | By Kira
A group of Masters students of the Bartlett School of Architecture has turn it intod a new method for 3D printing concrete that combines two existing 3D printing methods, extrusion and powder bed printing, to 3D print sizeable and structurally sound architectural elements or furniture pieces, while via the quite least amount of material possible. Called Fossilized, this new 3D printing construction method may contribute a additional viable solution for construction-based 3D printing.

Companies of China to Italy to the Netherlands have been racing to turn it into novel methods for 3D printing houses, turn it intoings, and architectural structures that are as cost-effective as they are safe, study, and realistically attainable. Many existing methods for 3D printing turn it intoings consist of either via incredibly sizeable 3D printing equipment to turn it into the house on-location, or extruding sizeable concrete blocks in a factory, that are and so brought to the site and assembled.
So far, yet, neither of these systemes has proven to be entirely viable. The former can be prohibitively expensive, while the latter, where sizeable blocks are assembled on-site, is not unlike traditional construction systemes.


Aiming to “challenge standardized concrete prefabrication techniques,” Amalgamma, comprised of Masters students Alvaro Lopez Rodriguez, Francesca Camilleri, Nadia Doukhi, and Roman Strukov, is instead proposing a fabrication method that combines two existing concreted 3D printing methods to turn it into a form of “assisted extrusion.”
The Fossilized 3D printing technique consists of extruding ready-mixed concrete via an industrial ABB robotic arm programmed to follow a linear fabrication tool path—this is fundamentally how the D-Shape or other construction 3D printing equipment work as well. The concrete is pumped out through a customized tool head that extrudes at 1cm resolution, turn it intoing up the pre-defined 3D structure layer by layer.


Alongside this extrusion method, yet, Fossilized in addition takes advantage of powder bed 3D printing, in that a binding agent is injected into the print bed, hardening powdered material into solid objects. Powder bed printing allows for for additional rigorous, oddly shaped 3D printed creations.
So, as equite concrete layer is deposited, a 2nd customized tool head in addition deposits a layer of granular or powdered assist material around the concrete. A binder is incorporated into the extrusion system that detects weaknesses and hardens sure parts of the granular assist, making a multi-material, 3D printed piece.

“Due to the assist, the resulting concrete is of a much higher resolution with sizeable overhangs,” said Amalgamma. “The assisted extrusion method has therefore presented the opportunity to create forms that are additional varied and additional volumetric, as opposed to the quite straight vertical forms so far completed in 3D concrete practice.”
“The finalized 3D printing system therefore combines a dual material nozzle of concrete and binder that connects to an industrial robot and print both materials in the same routine,” concluded the creators.
On the other hand they admit that the Fossilised concrete 3D printing method is not perfect for 3D printing entire architectural structures begin to finish, it may yet be utilized for 3D printing a floor-wall-ceiling assembly, or a stair-floor-wall assembly as one whole architectural chunk. But these ‘chunks’ may yet require to be assembled on-site, the new 3D printing system allows for for time and material savings, as well as entirely new ‘tectonic qualities’ compared to traditional construction methods:
“Through a combination of heterogeneous chunks that are fabricated by varying the properties of the material through a linear tool path at equite layer printed, it becomes possible to reduce material, save time and in addition complete a create that is evokes continuity, structural directionality, create hierarchy, density variation and multi-materiality and continuity in a single form.”

To demonstrate the Fossilised concrete 3D printing technique, Amalgamma generated a 3D printed table (pictured above) and 3D printed column, that were presented at the AD Bartlett show last October. The team intends to go on exploring the multi-material aspect of this concrete 3D printing method, and some day they hope to 3D print a non-standard wall-window assembly, “fundamentally, a translucent 3D printed concrete structure.”
Several other novel projects in 3D printed construction include the Apis Cor circular mobile 3D printing device, ETH Zurich’s Mesh-Mould 3D printing, and Joris Laarman’s 3D printed metal bridge in Amsterdam.

Posted in 3D Printing Technology

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