Effect of magnetization conditions on the slump and compressive strength of magnetized water concrete

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Magnetized water (MW) technology uses a magnetic field to affect the dipole moment of water molecules, changing the hydrogen bonding between them. As a result, the physical and chemical properties of water are altered. MW has the potential to reduce the need for admixtures and cement while preserving the desired strength and workability of concrete. However, the exact mechanisms by which different magnetization conditions improve concrete properties remain unclear. This study explored the effects of magnetic field intensity and water flow velocity on the workability and compressive strength of concrete using a custom-built magnetization device. Twelve distinct MWs were prepared under varying magnetic field intensities (210, 230, 250, and 270 mT) and water flow velocities (0.5, 0.6, and 0.7 m/s), and the performance of the concrete was assessed by slump and compressive strength tests. Additionally, the physicochemical properties of the MW were examined. The research results indicated the presence of significant interactions between the magnetization parameters. When the water was magnetized at a flow velocity of 0.7 m/s, and combined with magnetic field intensities of 210 and 230 mT, both physicochemical properties of MW and the mechanical performance of the MW concrete were optimally enhanced. Under the conditions of a magnetic field intensity of 210 mT and flow velocity of 0.7 m/s, the workability and compressive strength of the concrete prepared with MW improved by 30.4 % and 13.7 %, respectively. These findings highlighted the importance of considering the combined effects of magnetization parameters when optimizing the mechanical properties of MW concrete.