以水化副產石灰應用於拌製填方材料之研究;Hydration Circulating Fluidized Bed ash used in mixing fill materials

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題名:	以水化副產石灰應用於拌製填方材料之研究;Hydration Circulating Fluidized Bed ash used in mixing fill materials
作者:	翁榮聖;Wong,Rong-Sheng
貢獻者:	土木工程研究所
關鍵詞:	水化副產石灰;二水石膏;水化反應;hydration reaction;dihydrate gypsum;HCFB ash
日期:	2012-07-19
上傳時間:	2012-09-11 18:03:19 (UTC+8)
出版者:	國立中央大學
摘要:	本研究為探討水化副產石灰搭配海砂以及現地土壤依照不同的比例做為填方材料，經由不同的試驗方法來觀察不同混合配比的的特性，分別決定出水化副產石灰與海砂以及水化副產石灰於現地土壤之最佳配比，再經由進行不同狀態下的水化副產石灰之性質以及不同環境的養護來觀察水化副產石灰的水化反應過程是否完成，並對於水化副產石灰在處裡以及使用上提供一些的建議給未來在使用上之參考。試驗結果顯示當水化副產石灰使用量越高時，試體的最佳含水量也隨之提升，水化副產石灰與海砂的混合料在浸水前後的CBR值出現較不穩定的情況，在與現地土壤的混合料中較穩定，但是土壤之CBR值較海砂還低。在膨漲潛能試驗中顯示，不論是海砂或是現地土壤之配比，都會產生膨脹，而膨脹量隨著養護時間的增加而持續上升。水化完成度試驗中可以發現水化副產石灰在浸水養護以及多含水量靜置兩種不同養護的方式下，以浸水養護的方式較佳，水化副產石灰在經過不同齡期的養護之後發現其試樣內部二水石膏的比例並不是很高，代表水化副產石灰要完全的形成比較穩定之二水石膏是需要較長的時間。如果能避免水化副產石灰的混料與水份接觸，則無體積膨脹的問題，但如果無法避免時，應該限制於非結構性填方使用，以免影響其預期功能。Hydration Circulating Fluidized Bed ash (HCFB) is through mixed with the CFB bed ash and fly ash, then soak those ashes in water for 24hr stable treatment, in order to achieve a large number of HCFB to apply for the fill material. This study is to explore the HCFB with sea sand and the site soil as fill material in accordance with the proportion of by the different test methods to observe the characteristics of the different mixing ratio to determine the best ratio, and the use of some of the proposals for future reference use. The test results show that HCFB using the higher the amount of the optimum moisture content (OMC) of the specimens also increase as a result, the califofnia bearing ratio (CBR) test value of HCFB and sea sand mixture before the ponding test is more stable then after ponding test, and the HCFB and soil mixture CBR value is even lower than the sea sand. Swell potential test whether the ratio of sea sand, or the site soil will produce expansion, and expansion continued to rise with the increase of curing time. Hydration degree of completion test can be found in the HCFB immersion in water conservation and more water content to stand for two different conservation, the two different conservation HCFB after the conservation of different ages and find that within their sample of dihydrate gypsum ratio is not very high, on behalf of the hydration byproduct lime to be the formation of stable dihydrate gypsum takes a long time. If can avoid the mixing material with the water, no volume expansion, but if can’t be avoided, they should limit the use of non-structural fill, so as not to affect its intended function.
顯示於類別:	[土木工程研究所] 博碩士論文

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