Feasibility Study on The Monitoring Indices of Magnetic Water for Hall Voltage

• Main Authors: Weng-yao Tu, 涂文耀
• Other Authors: 李釗
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/08842546335925261606

碩士 === 國立中央大學 === 土木工程研究所 === 95 === In applying magnetic water into concrete engineering, there isn''t any cheap and efficient way to monitor the degree of magnetization of magnetic water currently. Therefore, it''s hard to control the quality of concrete. This research temps to take Hall voltage produced in the process of magnetization as the monitoring indicator of magnetic water. The preliminary research starts in searching for methods that enable to measure the Hall voltage stably, furthermore, how water amount and its flow speed affect the Hall voltage. At the end, observe the character of magnetic water, and the relationships of the Hall voltage against compressive strength of hydraulic cement mortars, its flow value, and setting time. The results indicate that the stability of the Hall voltage can be measured with tubes of electric conduction, long electrode, plus capacitance, and circulating water, however, the reproducibility is not satisfied. The increase of water amount and its flow rate increases the Hall voltage, but the statistics is meaningless. Use of magnetic water can reduce the setting time of cement paste, increase the compression strength, and reduce the flow value of cement mortars.