| URN | etd-0720109-223847 | Statistics | This thesis had been viewed 764 times. Download 2 times. |
| Author | Po-Hung Liu | ||
| Author's Email Address | No Public. | ||
| Department | hazards | ||
| Year | 2008 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 235 |
| Title | Study of Impedance Behavior for Fine Aggregate and Mortar | ||
| Keyword | |||
| Abstract | This paper is to study the engineering property of fine aggregate of concrete by AC impedance. The research including the absorption capacity of sand, the impedance behavior of mortar and the setting time of concrete is implemented. The result shows that the absorption capacity of sand of varied F.M. can be determined by the relationship between electrical resistance or admittance and frequency. It is noticed that the value of electrical resistance or admittance has a gap between the frequency range 2000 Hz to 2510 Hz. The r-squared value of linear regression analysis with the relationship of water content and admittance is over 0.97. From the Nyquist plots for mortar, the impedance value increases and the admittance value decreases with increasing curing age. There is a linear trend between penetration resistance value or penetration resistance time and AC impedance value in concrete setting time test. In equivalent circuit simulation, the analysis of equivalent circuit model with interface effect is more accurate than that without interface effect. |
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| Files | indicate in-campus access only | ||
| Date of Defense | 2009-07-02 | Date of Submission | 2009-07-22 |