外文翻译---循环流化床煤灰综合建筑应用.docxVIP

附录外文文献及翻译Utilization of CFB Fly Ash for Construction ApplicationsR. E. Conn and K. SellakumarFoster Wheeler Development CorporationLivingston, NJA. E. BlandWestern Research InstituteLaramie, WYABSTRACTDisposal in landfills has been the most common means of handling ash in circulating fluidized bed (CFB) boiler power plants. Recently, larger CFB boilers with generating capacities up to 300 MWe are currently being planned, resulting in increased volumes and disposal cost of ash byproduct. Studies have shown that CFB ashes do not pose environmental concerns that should significantly limit their potential utilization. Many uses of CFB ash are being investigated by Foster Wheeler, which can provide more cost-effective ash management.Construction applications have been identified as one of the major uses for CFB ashes. Typically, CFB ash cannot be used as a cement replacement in concrete due to its unacceptably high sulfur content. However, CFB ashes can be used for other construction applications that require less stringent specifications including soil stabilization, road base, structural fill, and synthetic aggregate. In this study, potential construction applications were identified for fly ashes from several CFB boilers firing diverse fuels such as petroleum coke, refuse derived fuel (RDF) and coal. The compressive strength of hydrated fly ashes was measured in order to screen their potential for use in various construction applications. Based on the results of this work, the effects of both ash chemistry and carbon content on utilization potential were ascertained. Actual beneficial uses of ashes evaluated in this study are also discussed.INTRODUCTIONCFB combustion has developed into a mature technology for burning a wide range of fuels, while still achieving strict air emissions requirements. Typically, fuels are burned in a CFB boiler with the addition of limestone to capture SO2 in a solid form. With larger CFB boilers being brought online, a greater emphasis has