Aluminate 2K systems in digital concrete: Process, design, chemistry, and outlook
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Author / Producer
Date
2024-11
Publication Type
Journal Article
ETH Bibliography
yes
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Abstract
Digital concrete is advancing due to growing economic incentives for construction automation. Achieving more sustainable concrete construction requires carbon reduction, and digital concrete technologies enable material-saving designs. By decoupling production strength from design strength, two-component (2K) systems utilizing aluminate precipitation offer the most flexibility, allowing more sustainable mixes with higher substitution levels. However, 2K aluminate systems are complex and demand a deeper understanding of their chemistry and strength buildup. This article reviews the basics of 2K aluminate systems, specifically aluminum sulfate-based and calcium aluminate cement/calcium sulfate-based systems, and their use in an inline active mixing reactor. An example reaction engineering analysis predicts the degree of reaction in a given reactor design, relating it to yield stress. The two chemical systems are compared, and future research recommendations are provided.
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Publication status
published
Editor
Book title
Journal / series
Volume
185
Pages / Article No.
107644
Publisher
Elsevier
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
3D printing concrete; Digital concrete; Sustainability; Aluminate; Set on demand
Organisational unit
03891 - Flatt, Robert J. / Flatt, Robert J.
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
Notes
Funding
23-2 FEL-059 - Digital twin for static mixing of 3D printable low carbon concrete (ETHZ)