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dc.contributor.author
Jipa, Mihail-Andrei
dc.contributor.author
Aghaei Meibodi, Mania
dc.contributor.author
Giesecke, Rena
dc.contributor.author
Shammas, Demetris
dc.contributor.author
Leschok, Matthias
dc.contributor.author
Bernhard, Mathias
dc.contributor.author
Dillenburger, Benjamin
dc.date.accessioned
2021-09-30T06:36:10Z
dc.date.available
2021-09-30T06:32:20Z
dc.date.available
2021-09-30T06:36:10Z
dc.date.issued
2018-11-28
dc.identifier.uri
http://hdl.handle.net/20.500.11850/507716
dc.identifier.doi
10.3929/ethz-b-000507651
dc.description.abstract
This research puts forward a pioneering construction method which uses 3D-printed formwork for casting or spraying concrete in any conceivable shape. 3D printing overcomes the geometric limitations of traditional methods for fabricating formwork, enabling the construction of integrative concrete elements with elaborate, free-form and highly detailed surfaces. The proposed method was used in a full-scale architectural context for the Smart Slab, a 78-m2 prestressed concrete slab which consists of eleven 7.4-m-long prefabricated one-of-a-kind segments (Fig. 1). The Smart Slab is a fully functional structural element which showcases an exquisite digitally designed geometry, with a deeply folded surface and millimetre-precise details. Beyond the new and radically expressive aesthetic, this extensive and tolerance-free fabrication freedom for concrete enables the precise integration of the complete suite of building services and structural features necessary for a working building. Weighing over 9,000 Kg, the 3D-printed formwork for the Smart Slab relies on two different 3D printing technologies: binder jetting for the most part, as well as fused filament deposition for locally integrating building services within the slab. The formwork facilitates the accurate provision of functional voids within the slab for electrical conduits, water ducts, light fittings, fire sprinklers and rebar form ties, as well as for the accurate spatial curving of the posttensioning ducts. The integration of building services during prefabrication streamlines assembly on site and considerably reduces construction tolerances. Furthermore, a major achievement enabled by the 3D-printed formwork was the structural optimisation of the Smart Slab and consequent weight reduction of almost 70% in comparison to a conventional solid concrete slab. The optimisation distributed the material in a hierarchical curved rib structure, which varies between 30 and 60 cm in thickness, while the interstitial surfaces are only 2 cm thick. These results have implications beyond the Smart Slab itself, showcasing how the material strength of concrete can be advantageously combined with the geometric freedom of 3D printing in a new construction method for free-form load-bearing elements.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich, Digital Building Technologies (ITA)
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Concrete
en_US
dc.subject
Formwork
en_US
dc.subject
3D Printing
en_US
dc.subject
Digital fabrication
en_US
dc.title
3D-Printed Formwork for Prefabricated Concrete Slabs
en_US
dc.type
Conference Paper
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-09-30
ethz.size
9 p.
en_US
ethz.code.ddc
DDC - DDC::7 - Arts & recreation::720 - Architecture
en_US
ethz.event
1st International Conference on 3D Construction Printing (3DcP)
en_US
ethz.event.location
Melbourne, Australia
en_US
ethz.event.date
November 26-28, 2018
en_US
ethz.notes
Conference lecture held on 28 November 2018.
en_US
ethz.grant
Digital Fabrication - Advanced Building Processes in Architecture
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02602 - Inst. f. Technologie in der Architektur / Institute for Technology in Architecture::09566 - Dillenburger, Benjamin / Dillenburger, Benjamin
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02602 - Inst. f. Technologie in der Architektur / Institute for Technology in Architecture::09566 - Dillenburger, Benjamin / Dillenburger, Benjamin
en_US
ethz.grant.agreementno
141853
ethz.grant.agreementno
141853
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
NCCR (NFS)
ethz.grant.program
NCCR (NFS)
ethz.date.deposited
2019-02-21T12:30:51Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-09-30T06:32:30Z
ethz.rosetta.lastUpdated
2022-03-29T13:41:21Z
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/507651
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/326671
ethz.COinS
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