| URN | etd-0122110-130332 | Statistics | This thesis had been viewed 977 times. Download 0 times. |
| Author | A-Man Wu | ||
| Author's Email Address | No Public. | ||
| Department | hazards | ||
| Year | 2009 | Semester | 1 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 229 |
| Title | Effect of Pozzolanic Materials on Impedance property of Cement Paste | ||
| Keyword | |||
| Abstract | This paper is to study the engineering properties of cement paste with fly ash and slag addition, using AC impedance and Vicat needle penetration. The research including the setting time and the impedance behavior of cement paste incorporating with fly ash and slag is implemented. The results shows that the higher water-to-binder ratio, the higher initial and final setting time of paste; with the increase in fly ash and slag addition, the initial and final setting time of paste increases. At both fixed-frequency (100 Hz and 10 kHz), the impedance value of fly ash paste increases with increasing curing age. The impedance value of slag paste rises during 1-28 days of age; and keeps constant during 28-91 days of age. Before 28-d age, the value of impedance for slag is higher than that of impedance for fly ash paste, but after 28-d age, the value of impedance for fly ash is higher than that of impedance for slag paste. From Nyquist plots of fly ash and slag pastes, the impedance values of fly ash and slag pastes increase with increasing curing age. By equivalent circuit simulation of fly ash and slag pastes, the analysis of equivalent circuit model with interface effect is more accurate than that without interface effect. |
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| Files | indicate not accessible | ||
| Date of Defense | 2010-01-15 | Date of Submission | 2010-01-27 |