This study applied ground slag mixtures of bottom ash and fly ash, which werethe residues from a municipal solid waste incineration plant in Taiwan, to producereusable aggregate materials for use in construction engineering. The slag mixtureswith different proportions of bottom ash and fly ash were melted by plasma furnacethrough a nucleation process at 650°C and a crystallization process at 950°C and thenprocessed by air cooling to form glass-ceramic products. After nucleation andrecrystallization processes, solubility of toxic components and mechanical propertiesof the glass-ceramic slag were investigated. The results showed that the recrystallizedslag made using the proper ratio of incinerated bottom ash and fly ash has appropriateproperties for use in construction. The specific gravity of glass-ceramic product is2.29～2.60, water absorptive rate lower than 0.61%, and leaching values of heavymetals are less than the limits of Taiwanese environmental standards. The hardness ofrecrystallized slag is higher than that of nucleated slag. Either nucleated orrecrystallized slag can withstand abrasion when the slag is submerged in strongalkaline chemical and weak acid.
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