| URN | etd-0727111-043815 | Statistics | This thesis had been viewed 556 times. Download 8 times. |
| Author | Jian-Xing Lin | ||
| Author's Email Address | No Public. | ||
| Department | hazards | ||
| Year | 2010 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 206 |
| Title | Study of Chloride Behavior Long-term of Recycled Concrete of Taiwan | ||
| Keyword | |||
| Abstract | This research mainly studies the engineering properties of N-class recycled coarse aggregates and recycled concrete following the regulation specified in the ¡§Draft of Construction Specification for Recycled Concrete¡¨ published by the Ministry of Interior, the recycled concrete specimens are exposed to chloride solution as ASTM C1543 (Ponding test) to simulate the concrete specimens are exposed to marine environment. There are 8 different mixture proportions of recycled concrete specimens for the Ponding test which include two W/B ratios of 0.45 and 0.50, and three different proportions of recycled coarse aggregates (10%, 30%, 50%) to replace natural coarse aggregates by 365 days and 547 days and 729 days immersion. For different water-binder ratio, the total chloride concentration of specimens of W/B=0.55 are about 1 times of those of W/B=0.45. And the free chloride concentration of specimens of W/B=0.55 are about 1.5 times of those of W/B=0.45. The chloride concentration of specimens with high water-binder ratio are higher than those of low water-binder ratio, the total chloride concentration in concrete is about 1.08~1.58 times of those of the free ones. The immersion time increasing, the chloride diffusivity reducing, the total chloride diffusion coefficients are about 1.1~1.91 times of those of the free chloride diffusion coefficients in the recycled concrete specimens. The use of recycled concrete LightCon moDel life prediction, the results show some groups of numerical life prediction of instability and can not accurately predict the time. Free chloride at 729 day W/B=0.45(0%.10%,30%,50%) service life prediction is about 10.3 year, W/B=0.55(0%.10%,30%,50%) service life prediction is about 6.6 year. |
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| Files | indicate in-campus access at 2 years and off-campus access at 2 years | ||
| Date of Defense | 2011-07-01 | Date of Submission | 2011-07-27 |