利用燃煤飛灰及水庫淤泥研製發泡玻璃

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题名:	利用燃煤飛灰及水庫淤泥研製發泡玻璃
其它题名:	Recycling of Coal Fly Ash and Sediment for Foam Glass
作者:	徐丞寬 HSU, CHENG-KUANG
贡献者:	魏玉麟 WEI, YU-LING 環境科學與工程學系
关键词:	發泡玻璃;綠建材;熱導係數;TCLP;孔隙率 foam glass;green building material;thermal conductivity;TCLP;porosity
日期:	2019
上传时间:	2019-12-16T07:08:08Z (UTC)
摘要:	本研究以回收廢棄物並重新賦予這些廢棄物價值為目的，分別使用燃煤飛灰及水庫淤泥，與廢玻璃、發泡劑及泡沫穩定劑均勻混合用以製備新興的建材—發泡玻璃。將均勻混合之樣品取7克左右並使用油壓壓錠機在4000 psi的壓力下壓製成型，製作成圓餅狀，並分別使用4階段升溫條件，在最高溫度分別為750oC、775oC、800oC、825oC及850oC的溫度下燒製成發泡玻璃。本研究對成品進行各項物化特性之探討，包含XRD、ICP、SEM、體密度、吸水率、熱導係數、抗壓強度、孔隙率變化及燒失重等，藉以了解產品及原料之各種性質。閉孔孔隙率之定義為(1-體密度/粉密度) × 100%，為觀測發泡玻璃是否良好發泡之重要依據，實驗中的成功樣品(體密度<1 g/cm2)，可接受的型變範圍內)閉孔孔隙率大多介於70~80%。結果顯示，隨著溫度提升，各種配比之產品密度均下降，抗壓強度也隨之降低，而在750oC時，各配比燒製出的產品密度均>1 g/cm3，不符合發泡玻璃之要求。在較高溫度的情況下，可能因為過量發泡導致型變較大，得到較輕且抗壓強度較差的產品。在800oC下燒製出的產品其各方面測得之物理性質較佳。其中熱導係數介於0.068~0.073 Wm-1K-1之間，隔熱效果良好。產品經TCLP測試，其溶出濃度均符合法律規範，無超標之重金屬，符合綠建材重要的評估指標。 In order to recycle wastes and re-assign their value of them, this study uses coal fly ash and reservoir sediment separately, mixed with waste glass, foaming agent and foam stabilizer to prepare emerging building materials—foam glass. The mixture is about 7 grams and pressed, formed under 4000 psi pressure by a hydraulic press machine. The shape of pressed pellets are cylindical. The temperature rising conditions are in four-stages. The maximum temperatures for foaming reaction are from 750°C, 775°C, 800°C, 825°C and 850°C.In this study, the physicochemical properties of the finished product wereanalyzed, including XRD, ICP, SEM, bulk density, water absorption, thermalconductivity, compressive strength, porosity and loss on ignition, to understand the various properties of the products and raw materials.Closed porosity is an important basis to justify foam glass. The close porosity of the acceptable samples is mostly between 70 and 90%. The results show that as the temperature increases, product density decreases, and the compressive strength decreases. At 750°C, the bulk density of the products is >1 g/cm3, which does not conform the requirements of foam glass. At higher temperatures, the product size becomes larger due to excessive foaming, leading to lighter and less compressive strength products. Products fired at 800°C are preferred for comprehensive evaluation of all aspects. The thermal conductivity is between 0.068 to 0.073 W m-1k-1, indicating a good thermal insulation material.All TCLP concentration meet legal standard, which means the products can be classified as one of green building materials.
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