Journal Article10.1021/ES050420U
Change of mechanical properties during short-term natural weathering of MSWI bottom ash
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TL;DR: The present work describes the change of mechanical properties during the natural weathering of freshly quenched processed bottom ash, finding mechanical properties obtained are 6-7 times greater than those obtained from previously weathered bottom ash.
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Abstract: The present work describes the change of mechanical properties during the natural weathering of freshly quenched processed bottom ash. An unconfined uniaxial compression to failure test of the unbound material was used to determine compressive strength and modulus of elasticity. Three main stages of mechanical behavior were determined. In the first stage, during a period lower than 30 days, mechanical properties suddenly increase, with a compressive strength and elastic modulus 7 times greater than the initial parameters. During the second stage, compressive strength and modulus of elasticity lightly increase until approximately 90 days of curing time. Starting from this period both mechanical properties remain steady and independent of the curing time. The neoformed phases, the elevated water content, and the improvement of particle contact after compaction act as a binder layer among particles, increasing the mechanical parameters during the short-term natural weathering process. Because of this, the freshly compacted bottom ash progresses from behaving as an unbound material into a bound pavement material. These mechanical properties obtained from freshly quenched bottom ash are 6-7 times greater than those obtained from previously weathered bottom ash. The bottom ash expansion and leaching of metals were also evaluated.
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Citations
Review of leaching behavior of municipal solid waste incineration (MSWI) ash.
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A review of recent progress in biogas upgrading: With emphasis on carbon capture
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TL;DR: The immediate reuse of freshly quenched bottom ash as a subbase material in road constructions is possible, as both the mechanical properties and long-term leachability are enhanced.
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Characterization of the bottom ash in municipal solid waste incinerator
TL;DR: In this article, the main components of the bottom ash are glass, magnetic metals, minerals, synthetic ceramics, paramagnetic metals and unburned organic matter, and the characterization may be used to evaluate the potential applications of bottom ash and its environmental hazards, and evaluate the possibilities of recycling its main components.
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Municipal solid waste combustion ash: State-of-the-knowledge
TL;DR: The United States lags behind some countries in ash utilization as mentioned in this paper, with less than 5% of the ashes being utilized in the United States, while other countries, such as Denmark, the Netherlands, France, Germany, Switzerland, and Japan are further advanced in Ash utilization and in establishing a systematic process for evaluating and selecting disposal and utilization options.
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Application of Surface Complexation/Precipitation Modeling to Contaminant Leaching from Weathered Municipal Solid Waste Incinerator Bottom Ash
Jeannet A. Meima,Rob N.J. Comans +1 more
TL;DR: In this article, surface complexation/precipitation modeling is applied to describe the leaching of contaminants from weathered municipal solid waste incinerator (MSWI) bottom ash, and the results suggest that Mo and Zn are bound mainly to HFO.
196
Short-term natural weathering of MSWI bottom ash as a function of particle size.
TL;DR: The chemical and material composition of MSWI bottom ash depends on the particle size; this suggests that the mechanisms and kinetics of natural weathering are also a function of particle size.
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