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Open AccessArticle

Coal Combustion Wastes Reuse in Low Energy Artificial Aggregates Manufacturing

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INSTM Research Group Naples Parthenope, Department of Engineering, Parthenope University of Naples, Centro Direzionale Naples, Isola C4, Naples 80143, Italy
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Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio, 80, Naples 80125, Italy
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Author to whom correspondence should be addressed.
Materials 2013, 6(11), 5000-5015; https://doi.org/10.3390/ma6115000
Received: 17 July 2013 / Revised: 20 October 2013 / Accepted: 23 October 2013 / Published: 31 October 2013
Sustainable building material design relies mostly on energy saving processes, decrease of raw materials consumption, and increase of waste and by-products recycling. Natural and lightweight artificial aggregates production implies relevant environmental impact. This paper addresses both the issues of residues recycling and energy optimization. Particularly, three coal combustion wastes (Weathered Fly Ash, WFA; Wastewater Treatment Sludge, WTS; Desulfurization Device Sludge, DDS) supplied by the Italian electric utility company (ENEL) have been employed in the manufacture of cold bonded artificial aggregates. Previously, the residues have been characterized in terms of chemical and mineralogical compositions, water content, particle size distribution, and heavy metal release behavior. These wastes have been used in the mix design of binding systems with the only addition of lime. Finally, the artificial aggregates have been submitted to physical, mechanical, and leaching testing, revealing that they are potentially suitable for many civil engineering applications. View Full-Text
Keywords: sustainable concrete and mortars; artificial aggregates; weathered coal fly ash; wastewater treatment sludge; desulfurization device sludge sustainable concrete and mortars; artificial aggregates; weathered coal fly ash; wastewater treatment sludge; desulfurization device sludge
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Ferone, C.; Colangelo, F.; Messina, F.; Iucolano, F.; Liguori, B.; Cioffi, R. Coal Combustion Wastes Reuse in Low Energy Artificial Aggregates Manufacturing. Materials 2013, 6, 5000-5015.

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