Article
Version 1
Preserved in Portico This version is not peer-reviewed
Practice-Oriented Buildability Criteria for Developing 3D-Printable Concretes in the Context of Digital Construction
Version 1
: 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.
Abstract
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.
Keywords
digital construction; 3D-concrete-printing; buildabiltiy; additive manufacturing
Subject
Engineering, Civil Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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