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 language | English |
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Title of host publication | Third RILEM International Conference on Concrete and Digital Fabrication. DC 2022 |
Editors | R. Buswell, A. Blanco, S. Cavalaro, P. Kinnell |
Place of Publication | Cham, Switzerland |
Publisher | Springer |
Pages | 87-92 |
Number of pages | 6 |
ISBN (Electronic) | 9783031061165 |
ISBN (Print) | 9783031061158 |
DOIs | |
Publication status | Published - 25 Jun 2022 |
Publication series
Name | RILEM Bookseries |
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Volume | 37 |
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