Utilization of the Gasification-Melting Slag from Municipal Solid Waste as Fine Aggregate for Concrete

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  • 都市ごみガス化溶融スラグのコンクリート用細骨材としての利用

Abstract

In recent years, a technique for producing slag (MSW slag) by melting municipal solid waste or its incinerated ash at more than 1,300°C, and cooling it has been developed. This study examines 4 kinds of gasification MSW slag (rotary kiln, thermo select, fluidized-bed and coke-bed) and discusses the possibility of its utilization as fine aggregate for concrete. It is clear that the possibility is high because almost every MSW slag satisfies the quality standard as fine aggregate for concrete. Moreover, a concrete product of 50% slag replacement ratio to fine aggregate had no problem with strength and freeze-thaw resistance. It is, therefore, judged that the product can be put to use.

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