Electrostatically charged cement particles for electrostatic proof of chlorine corrosion and the analysis of its electrostatic charge mechanism

• Project/Area Number: 23656281
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Tokyo Institute of Technology (2012-2013); Kyushu University (2011)
• Principal Investigator: TAKAHASHI Fumitake 東京工業大学, 総合理工学研究科(研究院), 准教授 (00414376)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 静電的防食 / 帯電化微粒子 / 分極固化 / セメント / 印加昇温 / 印加消温

Research Abstract

Electrostatically charged cement particles could be synthesized by the simple method; Charged cement solidification. Voltage potential differences were ranged from 1 to 12 mV, which was lower than the target value (100 mV). Electrolytically-generated gas inhibited continuous contact between the electrode and cement materials, and thus decreased charging efficiency.
Electrostatically charged parts were pulverized and their mineralogical compositions were analyzed by XRD. Elemental iron was found in particular in positive-charged parts. Further study is necessary to indentify certain minerals which contributed to electrostatic charge.