Abstract
The application of magneto-rheology control in extrusion-based 3D concrete printing is conceptually examined by rheological experiments on cementitious paste with nano-Fe3O4. The extruding process is simulated by a constant shearing, and the buildability after extrusion is characterized by the structural build-up from small amplitude oscillatory time-sweep test. A pulsed magnetic field is applied during shearing and then removed when the shearing terminates. It is revealed that some residual magnetic clusters exist in the suspension after removing the magnetic field due to the remanent magnetization of the nanoparticles. This results in a faster structural build-up compared to the situation without being treated by magnetic field, and this is independent of the magnetic field duration within the considered range from 1 s to 5 s. This finding offers an innovative methodology to actively improve the buildability of 3D printed concrete by introducing a short-pulsed magnetic field during extrusion.
Highlights
This current research examines the potential application of magnetorheology control in extrusion-based 3D concrete printing by rheological experiments on cementitious paste with nano-Fe3O4 particles
The results indicate that the application of a pulsed magnetic field (PMF) during extrusion in 3D printing will possibly lead to a higher evolution of structuration of cementitious paste with magnetic particles
The potential of magneto-rheology control in extrusion-based 3D concrete printing is conceptually examined by rheological experiments
Summary
This current research examines the potential application of magnetorheology control in extrusion-based 3D concrete printing by rheological experiments on cementitious paste with nano-Fe3O4 particles. The extruding process is simulated by constant shearing, and the buildability after extrusion is characterized by structural build-up using oscillatory time sweep test. A short-pulsed magnetic field is applied to the cemen titious paste at the end of the shearing. The subsequent evolution of storage modulus, regarded as a post-effect of the applied magnetic field, is evaluated and correlated to the duration of the magnetic field and the magnetic properties of the nanoparticles
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
