This version is not peer-reviewed
Practice-Oriented Buildability Criteria for Developing 3D-Printable Concretes in the Context of Digital Construction
: Received: 24 August 2018 / Approved: 27 August 2018 / Online: 27 August 2018 (06:37:13 CEST)
A peer-reviewed article of this Preprint also exists.
Journal reference: Automation in Construction 2019, 109
Buildability, i.e. the ability of a deposited material bulk to retain its dimmensions under increasing load, is an inherent prerequisite for formwork-free digital construction (DC). Since DC processes are relatively new, no standard methods of characterization are available yet. The paper at hand presents practice-oriented buildabilty criteria by taking various process parameters and construction costs into consideration. In doing so, direct links between laboratory buildability tests and target applications are established. A systematic basis for calculating the time interval (TI) to be followed during laboratory testing is proposed for the full-width printing (FWP) and filament printing (FP) processes. The proposed approach is validated by applying it to a high-strength, printable, fine-grained concrete. Comparative analyses of FWP and FP revealed that to test the buildability of a material for FP processes, higher velocities of the printhead should be established for laboratory tests in comparison to those needed for FWP process, providing for equal construction rates.
digital construction; 3D-concrete-printing; buildabiltiy; additive manufacturing
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