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

Producción científica: Capítulo del libro/informe/acta de congresoCapítulorevisión exhaustiva

Resumen

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.

Idioma originalInglés
Título de la publicación alojadaMaterials Science Forum
EditorialTrans Tech Publications Ltd
Páginas161-167
Número de páginas7
DOI
EstadoPublicada - 2023

Serie de la publicación

NombreMaterials Science Forum
Volumen1093
ISSN (versión impresa)0255-5476
ISSN (versión digital)1662-9752

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