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, ABSTRACT. Although it has been known that the magnetized water shows different physicochemical properties, the exact nature of the magnetized water is not clearly elucidated yet. We have explored the effect of magnetized water in the precipitation of salts, i.e., BaSO 4, BaCO3, and CaCO3, and in the hydration hard- ening of gypsum plaster. The amount of salt precipitation was measured by salt filter assay in water bath, 25 o C and also the hydration hardening speed of gypsum plaster was measured by the Gillmore needle method at room temperature. When the salt ions were interacted with each other in 0.1 M concentration, the precipitation reactions of BaSO4, BaCO3, and CaCO3 increased more in the magnetized water, about 3.6%, 3.8%, and 4.4%, respectively, than in the control water. And the hydration hardening speed of gypsum plaster increased more in the magnetized water than in the control water. These data suggest that the magnetized water, which is sup- posed to be organized by forming numerous nano/micro clusters, induces the increase of salt precipitation and also accelerates the hydration hardening speed of gypsum plaster.

Study on the Effect of Magnetized Water in the Precipitation Reaction of Salts and in the Hydration Hardening Speed of Gympsum Plaster