Magnetic susceptibility and magnetic resonance measurements of the moisture content and hydration condition of a magnetic mixture material

Keiji Tsukada, T. Kusaka, M. M. Saari, R. Takagi, Kenji Sakai, Toshihiko Kiwa, Y. Bito

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We developed a magnetic measurement method to measure the moisture content and hydration condition of mortar as a magnetic mixture material. Mortar is a mixture of Portland cement, sand, and water, and these materials exhibit different magnetic properties. The magnetization-magnetic field curves of these components and of mortars with different moisture contents were measured, using a specially developed high-temperature-superconductor superconducting quantum interference device. Using the differences in magnetic characteristics, the moisture content of mortar was measured at the ferromagnetic saturation region over 250 mT. A correlation between magnetic susceptibility and moisture content was successfully established. After Portland cement and water are mixed, hydration begins. At the early stage of the hydration/gel, magnetization strength increased over time. To investigate the magnetization change, we measured the distribution between bound and free water in the mortar in the early stage by magnetic resonance imaging (MRI). The MRI results suggest that the amount of free water in mortar correlates with the change in magnetic susceptibility.

Original languageEnglish
Article number4852075
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
Publication statusPublished - May 7 2014

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moisture content
magnetic resonance
hydration
magnetic permeability
cements
magnetization
water
high temperature superconductors
sands
magnetic measurement
gels
magnetic properties
saturation
interference
curves
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Magnetic susceptibility and magnetic resonance measurements of the moisture content and hydration condition of a magnetic mixture material. / Tsukada, Keiji; Kusaka, T.; Saari, M. M.; Takagi, R.; Sakai, Kenji; Kiwa, Toshihiko; Bito, Y.

In: Journal of Applied Physics, Vol. 115, No. 17, 4852075, 07.05.2014.

Research output: Contribution to journalArticle

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