探討磁化水之霍爾效應對於砂漿抗壓強度之關係

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/1027

Title:	探討磁化水之霍爾效應對於砂漿抗壓強度之關係
Authors:	馬宗佑;Chung-Yo Mar
Contributors:	土木工程研究所
Keywords:	砂漿抗壓強度;霍爾電壓;磁化水;Compressive strength of mortar;Magnetic water;Hall voltage
Date:	2005-07-06
Issue Date:	2009-09-18 17:18:18 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	摘要利用磁化水拌和混凝土存在一大問題那就是成效上的 “不穩定”，加上目前為止沒有測定磁化水磁化程度的儀器及設備，因此無法得知磁化水的性質和磁化程度，故混凝土品質難以控制。有鑑於此本研究便利用磁化過程中所產生的霍爾電壓，作為反應抗壓強度變化的指標，於是致力於研究磁化水霍爾電壓的原理加以穩定，並分析霍爾電壓與水泥砂漿試體抗壓強度之間的關係，實驗過程中的電極採用MHD發電器的電極原理，以求能穩定量測到霍爾電壓，並可探討電極大小對抗壓強度的影響。研究成果發現以銅箔膠帶所製作的1cm長的電極可以量測到穩定的霍爾電壓。而以大電極管所磁化的磁化水，拌製出來的水泥砂漿抗壓強度，可得到穩定的抗壓強度曲線，由實驗數據中得知抗壓強度依循著磁場強度增加而增加，磁場0.96T的抗壓強度>0.84T>0.65T>0.46T。另外其抗壓強度與霍爾電壓的關係，在磁化水的流速小於220m/min時，抗壓強度與霍爾電壓呈正比關係，大於220m/min時呈反比關係。各種不同長度大小的磁化電極，其水泥砂漿抗壓強度數據中，可推論出霍爾效應有沒有發揮至極致，將影響磁化水增強砂漿抗壓強度之穩定性。 Abstract Due to the instability of the use of mixing magnetic water with concrete and the lack of any equipment or device for measuring the level of magnetization of magnetic water, the quality and level of magnetization of magnetic water remains unknown, and it is therefore hard to control the quality of concrete. Therefore, this study utilizes Hall voltage produced in the process of magnetization as the indication of reacting to the changes of compressive strength, and is devoted to investigating the principle of Hall voltage of magnetic water and stabilizing it. Also, the relation between compressive strength of mortar and Hall voltage is analyzed by applying the electrode principle of MHD generator in the process of the experiment so as to acquire stable Hall voltage and investigate the impact of level of electrode on compressive strength. The result of the study indicates that stable Hall voltage can be measured by a 1cm electrode made of copper foil. Moreover, a stable compressive strength curve of compressive strength of mortar mixed by the magnetic water magnetized by the electrode (1cm) can be acquired. The compressive strength increases as the magnetic-field intensity increases according to the experiment data. The compressive strengths of magnetic field: 0.96T>0.84T>0.65T>0.46T. In terms of the relation between compressive strength and Hall voltage, both of them are in a direct proportion as the flow velocity of magnetic water is less than 200m/min. On the contrary, they are in inverse proportion as the velocity is more than 200m/min. Among magnetized electrodes in various lengths and compressive strengths of mortar, based on the observations of the figures, it can be concluded whether Hall Effect has been employed to the utmost will influence the stability of compressive strength of mortar improved by magnetic water.
Appears in Collections:	[土木工程研究所] 博碩士論文

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