Preliminary Experimental Evaluation of Buildability Improvement Methods for Concrete for 3D Printing

Jordan Baldoceda, Guido Silva, Suyeon Kim, Gaby Ruiz, Miguel A. Pando, Javier Nakamatsu, Rafael Aguilar

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

3D concrete printing is an innovative construction process based on fully auto nomousmaterial deposition. One of the challenges of implementing this technology is the development of printable concrete formulations, as this material must exhibit particular fresh-state properties. Among these, buildability is one of the most important. This property describes the material's ability to support weight at very early ages, allowing a layer-by-layer construction. Therefore, this paper aims to evaluate two approaches for improving concrete buildability: the optimization of the super plasticizer dosage and the external application of quick-setting admixture. The results showed that reducing super plasticizer content improved buildability by increasing the static yield strength.However, this approach has a collateral disadvantage as concretes presented problems duringextrusion. On the other hand, the results of cylinder stability and Vicat tests indicate that the external application of quick-setting admixture leads to concretes with improved buildability without affecting the initial workability and a faster hardening process. According to these results, the latter approachcan potentially be applied in small and large-scale 3D printing.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publications Ltd
Pages161-167
Number of pages7
DOIs
StatePublished - 2023

Publication series

NameMaterials Science Forum
Volume1093
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Keywords

  • 3D printing
  • acceleratingadmixture
  • additive manufacturing
  • buildability
  • cement
  • concrete
  • mortar

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