A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Direct printing test for buildability of 3D-printable concrete considering economic viability
https://orcid.org/0000-0002-8580-5320
Abstract Buildability, i.e. the ability of a deposited material bulk to retain its dimensions under increasing load, is an inherent prerequisite for formwork-free digital concrete construction (DC). Since DC processes are relatively new, no standard methods of characterization are available yet. The paper presents direct printing test as a practice-oriented approach, in which buildability test parameters are determined by taking various process aspects 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 verified 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.
Highlights Practice-oriented approach for characterizing buildability is proposed. The applicability of the model in quantifying the economic viability of 3D-printing is demonstrated. Proposed buildability approach is verified by tests on a printable concrete. Specimen height and time interval are specified as parameters for buildability tests on printable concretes. Variations regarding buildability test specifications for full-width and filament printing techniques are described.
Direct printing test for buildability of 3D-printable concrete considering economic viability
https://orcid.org/0000-0002-8580-5320
Abstract Buildability, i.e. the ability of a deposited material bulk to retain its dimensions under increasing load, is an inherent prerequisite for formwork-free digital concrete construction (DC). Since DC processes are relatively new, no standard methods of characterization are available yet. The paper presents direct printing test as a practice-oriented approach, in which buildability test parameters are determined by taking various process aspects 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 verified 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.
Highlights Practice-oriented approach for characterizing buildability is proposed. The applicability of the model in quantifying the economic viability of 3D-printing is demonstrated. Proposed buildability approach is verified by tests on a printable concrete. Specimen height and time interval are specified as parameters for buildability tests on printable concretes. Variations regarding buildability test specifications for full-width and filament printing techniques are described.
Direct printing test for buildability of 3D-printable concrete considering economic viability
https://orcid.org/0000-0002-8580-5320
Abstract Buildability, i.e. the ability of a deposited material bulk to retain its dimensions under increasing load, is an inherent prerequisite for formwork-free digital concrete construction (DC). Since DC processes are relatively new, no standard methods of characterization are available yet. The paper presents direct printing test as a practice-oriented approach, in which buildability test parameters are determined by taking various process aspects 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 verified 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.
Highlights Practice-oriented approach for characterizing buildability is proposed. The applicability of the model in quantifying the economic viability of 3D-printing is demonstrated. Proposed buildability approach is verified by tests on a printable concrete. Specimen height and time interval are specified as parameters for buildability tests on printable concretes. Variations regarding buildability test specifications for full-width and filament printing techniques are described.
Direct printing test for buildability of 3D-printable concrete considering economic viability
Nerella, Venkatesh Naidu (author) / Krause, Martin (author) / Mechtcherine, Viktor (author)
2019-10-12
Article (Journal)
Electronic Resource
English
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