Structural parts based on Municipal-Solid-Waste incineration ashes

We investigated a novel processing technique of municipal solid waste incineration (MSWI) ashes. By using two thermodynamic driving forces - a strong alkaline activator and a compaction pressure, the otherwise relatively nonreactive MSWI ashes could form strong solids, with relatively high flexural and compressive strengths. The produced material was dense, with a low defect density. The effects of the compaction pressure range, the alkaline activator amount, and the MSWI fly ash to bottom ash ratio were examined. We also used 5 wt% class-C fly ash, 5 wt% class-F fly ash, and/or 1 wt% epoxy as additives. This study may open a door to advanced MSWI ash upcycling approaches, useful to environmental preservation and sustainability.

Automated summary

This study investigates a novel processing technique for municipal solid waste incineration (MSWI) ashes. By utilizing an alkaline activator and compaction pressure, MSWI ashes can be transformed into strong solids with high flexural and compressive strengths. The produced material is dense and low in defects. The study examines the effects of compaction pressure range, alkaline activator amount, and the ratio of MSWI fly ash to bottom ash. Additives such as class-C fly ash, class-F fly ash, and epoxy are explored as well. This research opens pathways for advanced upcycling approaches of MSWI ash, contributing to environmental preservation and sustainability.