水庫淤泥燒結與發泡之研究

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Title:	水庫淤泥燒結與發泡之研究
Other Titles:	Sintering and Vesicant Study of Lightweight Aggregate Formation of Reservoir Sediments with Various Additives
Authors:	周贊祐 Chou, Tsan-Yu
Contributors:	魏玉麟東海大學環境科學與工程學系
Keywords:	水庫淤泥;輕質骨材;燒結;發泡;廢棄物 reservoir sediment;lightweight aggregate;sintering;vesicant;waste
Date:	2005
Issue Date:	2011-05-19T08:24:21Z (UTC)
Abstract:	水庫淤泥屬經高溫燒結時會釋出氣體，是一種適合用來作為製備輕質骨材的基本材料。台灣水庫淤泥多為膨脹性頁岩與粘土，具有燒製輕質骨材之潛力，除了原料符合輕質骨材之燒結與發泡機制外，其粒徑也可免去粉碎之前處理過程。台灣水庫淤積問題嚴重，有淤積量測量之五十餘座水庫，平均每年達2,300萬立方公尺以上之總淤積量，為一充沛的輕質骨材原料來源。本研究以水庫淤泥為基本材料，添加不同之添加劑（如：SiO2、Al2O3、鹼金屬碳酸鹽化合物、廢棄物）後，在不同溫度下予以燒結發泡，並以各種不同儀器探討其燒結與發泡反應。實驗參數包括添加劑種類及添加量、燒結溫度等，基本分析包括淤泥粒徑分布、淤泥與添加劑之元素分析及熱重分析，試體分析包括SEM表面觀察及XRD物種鑑定。研究結果指出，水庫淤泥有燒製成輕質骨材之潛力，本研究針對之六座水庫中，石門及烏山頭水庫可直接造粒燒製成輕質骨材最具經濟效益。此外，添加鹼金屬族化合物，能有效降低燒結溫度，輔以添加合適之發泡劑，使其發泡現象顯著，將有益於輕質骨材之燒製。而飛灰所含之化合物，可形成共熔現象，為一有效之熔流劑，適量添加，除可降低輕質骨材之燒結溫度，另可收廢棄物減量之效。 Reservoir sediment is a kind of specimen rich in silica. It is well recognized that bloating compounds evolving gas after sintering are suitable additives for manufacturing lightweight aggregate. Bottom sediment, which is mostly expansibility shale and clay, from reservoirs in Taiwan has the potential of sintering lightweight aggregate not only because its ingredients fit the sintering of lightweight aggregate and vesicant mechanism but also because its particle size range can bypass the steps of previous administrating processes. There is a serious problem of bottom sediment from reservoirs in Taiwan. Among the 46 reservoirs being measured in this study, in average, the amount of deposits reaches 14,600,000 m3, which can be a rich resource of lightweight aggregate. The basic materials of the present study were sediment from reservoirs. Various bloating additives such as SiO2, Al2O3, carbonate of alkali metal, and the waste were mixed with the sediment and heated under different temperatures. Various instruments were used to examine its vesicant mechanism. Experimental parameters of this study include the kind and amount of bloating additives and sintering temperature, etc. Basic analyses include the distribution of particle size range, the element analysis of sediment and its additives, and the analysis of heat and weight. The instruments used in the present study were SEM and XRD. The results show that sediments from reservoirs have a high potential to sinter lightweight aggregate. Among the six examined reservoirs, Shihmen reservoir and Wushantou reservoir were found to hold the highest economical benefits on account of its direct pellet and sintering into lightweight aggregate. In addition, the sintering temperature can be effectively decreased. With the help of suitable vesicant additive, the signalized vesicant helps the sintering of lightweight aggregate. Additionally, compounds of gas were effective flux because of its acceleration of eutectic state. By adding adequate amount of them can not only lower the sintering temperature of lightweight aggregate but also diminish the amount of waste.
Appears in Collections:	[環境科學與工程學系所] 碩博士論文

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