Title:
Magnetorheological Cementitious Nanocomposites—Tuned for Active Control and Digital Construction
Author(s):
Konstantin Sobolev
Publication:
Web Session
Volume:
ws_S24_Konstantin Sobolev.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/24/2024
Abstract:
This research developed the Magnetorheological Cementitious Inks based on compositions incorporating various proportions of portland cement, ferrous Class-F fly ash, nanosilica, and nanoalumina. The inks were characterized for rheological response under a magnetic field in order to better understand the effects of doping cement with magnetic material for application in ‘4D-printing’ of cementitious ‘smart materials.’ Control groups doped with industrial-grade magnetite powder (primarily used as a pigment) were likewise mixed and characterized to provide contrast to coal-combustion byproduct fly ash. Mixtures supplemented with ferromagnetic particles showed increased yield stress when exposed to the applied magnetic field, leading to non-Newtonian rheological models exhibiting ‘sticky particles’ patterns, as discussed herein. These results suggest that the principle of utilizing an applied magnetic field to modify the flow and slump of cementitious materials tuned for active control and extrusion through 3D-printing apparatus is worthy of further pursuit and development.