Technologies for improving buildability in 3D concrete printing

Article

Muthukrishnan, Shravan, Ramakrishnan, Sayanthan and Sanjayan, Jay. 2021. "Technologies for improving buildability in 3D concrete printing." Cement and Concrete Composites. 122. https://doi.org/10.1016/j.cemconcomp.2021.104144
Article Title

Technologies for improving buildability in 3D concrete printing

ERA Journal ID21082
Article CategoryArticle
AuthorsMuthukrishnan, Shravan, Ramakrishnan, Sayanthan and Sanjayan, Jay
Journal TitleCement and Concrete Composites
Journal Citation122
Article Number104144
Number of Pages19
Year2021
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0958-9465
1873-393X
Digital Object Identifier (DOI)https://doi.org/10.1016/j.cemconcomp.2021.104144
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0958946521002122
AbstractBuildability is the ability to 3D print by adding concrete layer by layer continuously to the required level without significant deformation or collapse of the freshly printed component. This paper presents a systematic review of the reported studies to improve the buildability of concrete. The paper also presents original concepts and some results for improving the buildability of geopolymer concrete. Two methods to enhance the buildability are discussed: (1) Additives during initial mixing of concrete (2) Buildability enhancement at the print-head by an intervention (set-on-demand). The former method is the most widely studied, however, it affects the pumpability. The latter includes mixing accelerators, heating, ultrasonication, or magnetorheological control, performed at the print-head to rapidly increase the yield strength of the material immediately prior to extrusion. This method does not affect the pumpability of the mix until it reaches the print-head. Finally, the prospects of a new set-on-demand method are presented.
KeywordsBuildability; Concrete 3D printing ; Set-on-demand ; Active rheology control ; Active stiffening control ; Geopolymer
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020400505. Construction materials
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Byline AffiliationsSwinburne University of Technology
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