Abstract
Materials’ requirements for 3D concrete printing centre around printability and buildability. The concrete must be pumpable, extrudable, yet retain its shape after extrusion (fresh state) and stack over each other without yielding and buckling failure (plastic state). The nature of 3D printed concrete materials has driven research into adapting various test methods to assess these requirements. This study reports selected test methods evaluated for 3DCP in its fresh and plastic state – rheometry, unconfined compression tests, gravity-driven (slug) tests and slow penetration tests. The study further highlights their correlations, applications, and practicality for the two main types of printable materials – enhanced-thixotropic and accelerated-hydration concrete.
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Acknowledgement
This work is supported by the UK fundings EPSRC EP/S019618/1 DfM:3DCP and EP/S031405/1 3DCP:HCP. ‘East Paris Universities, iSite Futures visiting academics initiative’ is also acknowledged.
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Kolawole, J.T. et al. (2022). Selected Test Methods for Assessing Fresh and Plastic-State 3D Concrete Printing Materials. In: Buswell, R., Blanco, A., Cavalaro, S., Kinnell, P. (eds) Third RILEM International Conference on Concrete and Digital Fabrication. DC 2022. RILEM Bookseries, vol 37. Springer, Cham. https://doi.org/10.1007/978-3-031-06116-5_68
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DOI: https://doi.org/10.1007/978-3-031-06116-5_68
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