Vibration induced active rheology control for 3D concrete printing

3D concrete printing, an emerging automation technology for construction, requires the concrete to be flowable during pumping and extrusion but firm immediately after layer deposition. This study investigated an active rheology control using vibration to achieve these opposing requirements. The effe...

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Bibliographic Details
Published in:Cement and concrete research 2021-02, Vol.140, p.106293, Article 106293
Main Authors: Sanjayan, J.G., Jayathilakage, R., Rajeev, P.
Format: Article
Language:English
Subjects:
3D concrete printing
Acceleration
Active control
Buildability
Concrete
Concrete construction
Extrusion
Mechanical properties
Nanoparticles
Rheological properties
Rheology
Three dimensional printing
Vibration
Vibration effects
Yield strength
Yield stress
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Summary:3D concrete printing, an emerging automation technology for construction, requires the concrete to be flowable during pumping and extrusion but firm immediately after layer deposition. This study investigated an active rheology control using vibration to achieve these opposing requirements. The effects of vibration frequency and acceleration on rheological parameters of concrete were studied with different levels of nanoparticles in the mix. It was found that extrusion pressure and yield stress show less sensitivity to the peak velocity of the vibration up to a certain level and then they both decrease beyond this level. Also, certain level of nanoparticles inclusion found to double the reduction in extrusion pressure and yield stress. Buildability studies using 3D printers were conducted to demonstrate the active rheology control using vibration. The mechanical properties of the printed structures were also found to have improved when vibration rheology control was used.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2020.106293