2014年5月
Magnetic susceptibility and magnetic resonance measurements of the moisture content and hydration condition of a magnetic mixture material
JOURNAL OF APPLIED PHYSICS
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- 巻
- 115
- 号
- 17
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/1.4852075
- 出版者・発行元
- AMER INST PHYSICS
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. (C) 2014 AIP Publishing LLC.
- リンク情報
- ID情報
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- DOI : 10.1063/1.4852075
- ISSN : 0021-8979
- eISSN : 1089-7550
- Web of Science ID : WOS:000335643700509