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Material Characterization of Municipal Solid Waste Incinerator (MSWI) Ash as Road Construction Materials

机译：市政固体废物焚烧炉（MSWI）灰作为道路施工材料的材料特性

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In the United States, bottom and fly ashes from Waste-to-Energy (WTE) plants are typically mixed together before the disposal into landfills in order to meet the US Environmental Protection Agency (EPA) requirements. On the other hand, in many Asian and European countries, the WTE fly ash is not mixed with bottom ash, but rather handled as a special waste. In this instance, the bottom ash is often recycled and used as a material in pavement and other similar products. Reuse of the WTE ashes in Portland cement concrete (PCC) and Hot-Mix Asphalt (HMA) may offer a significant contribution to reduce cost for waste disposal, natural resources conservation, and developing sustainable construction. An important factor hindering the acceptance of WTE ashes as construction materials, however, is their uncertain physical and chemical properties. In this study, fundamental properties of the WTE bottom and fly ashes were studied by conducting physical, microstructural, and chemical tests using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD).
机译：在美国，通常将废物变能源（WTE）工厂的底部和粉煤灰混合在一起，然后再丢弃到垃圾填埋场中，以满足美国环境保护署（EPA）的要求。另一方面，在许多亚洲和欧洲国家，WTE粉煤灰不与底灰混合，而是作为特殊废物处理。在这种情况下，底灰通常被回收并用作路面和其他类似产品的材料。波特兰水泥混凝土（PCC）和热拌沥青（HMA）中WTE灰的再利用可能为减少废物处置，自然资源保护和发展可持续建筑的成本做出重大贡献。但是，阻碍将WTE骨灰用作建筑材料的一个重要因素是其不确定的物理和化学性质。在这项研究中，通过使用扫描电子显微镜（SEM），能量色散X射线（EDX）和X射线衍射（XRD）进行物理，微观结构和化学测试，研究了WTE底部和粉煤灰的基本特性。

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