3D printing system for earth-based construction: Case study of cob

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dc.contributor.authorGomaa, M.
dc.contributor.authorJabi, W.
dc.contributor.authorVeliz Reyes, A.
dc.contributor.authorSoebarto, V.
dc.date.issued2021
dc.descriptionAvailable online 25 January 2021
dc.description.abstractDespite the dramatic development in digital manufacturing technologies in the recent years, 3D printing of earth materials, such as cob, still presents several challenges to the market-available 3D printing systems. This paper describes the development process of a 3D printing system for cob that fits the contemporary requirements of digital construction. The study first described the methodology of producing a revised cob recipe for the purpose of 3D printing. Then, the study conducted thorough investigations into the properties of three types of extrusion systems using both electromechanical and pneumatic methods, leading eventually to the development of a new bespoke dual-ram extruder. The study then explored systematically the relationship between the new 3DP system and the rheological properties of cob, followed by an exploration to the new geometric opportunities the new system offers. The study findings show that the new extrusion system improves greatly the 3DP process of cob in terms of extrusion rate, continuity, consistency, and mobility. The findings are expected to bring 3D printed cob construction closer to full-scale applications. On a broader scale the study contributes to the disciplines of architectural design and construction by providing a framework capable of bridging the knowledge gap between vernacular modes of building production and contemporary digital practice.
dc.description.statementofresponsibilityMohamed Gomaa, Wassim Jabi, Alejandro Veliz Reyes, Veronica Soebarto
dc.identifier.citationAutomation in Construction, 2021; 124:103577-1-103577-16
dc.identifier.doi10.1016/j.autcon.2021.103577
dc.identifier.issn0926-5805
dc.identifier.issn1872-7891
dc.identifier.orcidGomaa, M. [0000-0001-9463-4888]
dc.identifier.orcidSoebarto, V. [0000-0003-1397-8414]
dc.identifier.urihttp://hdl.handle.net/2440/130480
dc.language.isoen
dc.publisherElsevier BV
dc.rights© 2021 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.autcon.2021.103577
dc.subject3D printing; Additive manufacturing; Robotic construction; Digital fabrication; Extrusion system;s Cob; Earth-based material
dc.title3D printing system for earth-based construction: Case study of cob
dc.typeJournal article
pubs.publication-statusPublished

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