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碩士論文公告區 |
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| 年度： | 96 | |
| 姓名： | 程維康(Wei-Kang Cheng) | |
| 論文題目(中)： | 底灰比及水灰比對管溝開挖砂性土壤產製控制性低強度回填材料長期強度之研究 | |
| 論文題目(英)： | The Influence of Bottom Ash Ratio and Cement Ratio on the Long-term Strength of Controlled Low Strength Material Using Trench Excavation Sandy Soils | |
| 摘要(中)： | ||
| 本研究論文是使用管溝開挖時所產生之「砂性土讓」，及火力發電廠燃煤產生之廢棄物「底灰」兩種回收再利用材料，經由過篩處理將停留3/8”號篩以上篩之大顆粒去除後，以六種水灰比（3.2、2.7、2.18、1.71、1.41、1.1）與六種底灰比例（0％、20％、40％、60％、80％、100％），交叉配比後，初凝時間依不同配比約在12∼36小時之間，且結果顯示以水灰比3.2為基礎，水灰比約小於2.14時，試體28天強度百分比會快速且顯著成長（最高約達403％），另以底灰比例0％為基礎，底灰比例約50％時，試體28天強度百分比可以達到最大（約141％）；由此可見，降低水灰比為控制試體28天強度百分比增加之主因。 以三種水灰比（2.70、1.71、1.10）及三種底灰比例（60％、80％、100％）交叉配比後，並以短期（28天）強度為基礎，與長期（60天）強度比較時，長期（60天）強度成長百分比呈現3.92％∼29.95％之增加，證明試體強度會隨時間增加而成長，本研究顯示在某些配比下，使長期強度強度較為明顯，在CLSM實務應用上應予注意。 |
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| 摘要(英)： | ||
| The research was conducted to investigate the short term (28 days) and long term (60 days) strength of the controlled low strength material (CLSM) using the re-cycled materials including the sandy soils from pipe trench excavation and bottom ash from furnace of power plants. The sandy soil from trench excavations was washed and sieved to exclude sizes larger than 3/8” before the specimens were prepared with parameters of selected water cement ratios (3.2, 2.7,2.18,1.71,1.41, and 1.1) and bottom ash ratios (0, 20, 40, 60, 80, and 100%). The initial setting time of the CLSM specimens tested ranged from 12 to 36 hours which satisfy the specifications for the field operation. The results of the tests indicate that when the water cement ratio (w/c ratio) is less than 2.14, the 28-day strength of the CLSM increases more significantly up to 403% of that for w/c ratio=3.2. In addition, the 28-day strength reached the maximum when bottom ash ratio is around 50%, which is up to 141% of that for 0%bottom ash. This implies that decreasing the w/c ratio may be a main factor for increasing the short term strength of the CLSM, using the test results of w/c ratios of 2.7, 1.71 and 1.1 and bottom ash ratios of 60, 80 and 100%. The test results also indicated that the long term strength is still under development within 60 days with an increase from 3.9% to 29.95% of the 28-day strength. The significant long term strength development in some cases should be considered in the practical applications of the CLSM. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0825108-105133 | |