Accelerating Early Age Properties of Ultra-Low Clinker Cements for Extrusion-Based 3D Printing

Rutendo Rusike, Michael Sataya, Alastair T.M. Marsh, Sergio Cavalaro, Chris Goodier, Susan A. Bernal, Samuel Adu-Amankwah

Research output: Chapter or section in a book/report/conference proceedingChapter or section

Abstract

In this study, we investigated the influence of commercial sodium nitrate/thiocyanate accelerator compared to calcium sulfoaluminate cement addition on setting time, rheology and reaction kinetics of ultra-low clinker composite cement for extrusion-based 3D printing application. CEM I 52.5 N and a ternary composite cement with 70% clinker replaced by slag and limestone were evaluated. Results indicate that final setting time of 30 min and buildable yield stresses can be attained with less than 5% addition of calcium sulfoaluminate, with ettringite and C-(A)-S-H as main reaction products. This demonstrates the synergy between slag and calcium sulfoaluminate cements can be harnessed to control rheology and hardening. This is significance for evidencing suitability of ultra-low clinker composite cements for extrusion-based 3DCP, thus helping to fulfil its wider potential as a low-carbon concrete technology.

Original languageEnglish
Title of host publicationThird RILEM International Conference on Concrete and Digital Fabrication. DC 2022
EditorsR. Buswell, A. Blanco, S. Cavalaro, P. Kinnell
Place of PublicationCham, Switzerland
PublisherSpringer
Pages87-92
Number of pages6
ISBN (Electronic)9783031061165
ISBN (Print)9783031061158
DOIs
Publication statusPublished - 25 Jun 2022

Publication series

NameRILEM Bookseries
Volume37
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Keywords

  • 3D printing
  • Admixtures
  • Early age properties
  • Low-carbon cements
  • Setting time

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials

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