Research on Effect on Recycled Concrete with Different Replacement Proportion of Coarse Aggregates by Construction Bricks
| Autor: | Hong-Ru Chen, 陳弘儒 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 The purpose of this study was to ascertain the effect on the development of compressive strength and residual strength at enhanced temperatures of recycled concrete with different water cement ratios and varies percentages of replacing coarse aggregates with construction brick wastes. Before fracture test is applied, non-destructive methods such as measuring the pulse velocity through the samples, and ignition loss tests to calculate the degree of hydration in recycled concretes. Experiment results showed that different water cement ratio of recycled concrete, replacing by the sane percentage of coarse aggregate by construction bricks, had a less significant effect on reduction variation of compressive strength, residual strength at enhanced temperatures and pulse velocity. And the compressive strength, residual strength and pulse velocity of recycled concrete were decreased when more recycled brick aggregates are used. The compressive strength of concrete with 100% recycled brick aggregate was 85% of ordinary concrete. Compared to plain concrete, recycled concrete had a 7.3-24.4% reduction in the residual strength at enhanced temperatures. Due to the pulse velocity of brick were lower, the test results of recycled brick concrete were decreased when more recycled aggregates are used. Otherwise, the experiment variable were adopted to recycled coarse aggregate, test results showed that a higher percentage of recycled brick coarse aggregates used in concrete would not affect the ignition loss test results critically. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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