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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/176746
Alkali-activated binders using bottom ash from waste-to-energy plants and aluminium recycling waste
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Alkali-activated binders (AABs) stand out as a promising alternative to replace ordinary Portland cement (OPC) due to the possibility of using by-products and wastes in their manufacturing. This paper assessed the potential of weathered bottom ash (WBA) from waste-to-energy plants and PAVAL® (PV), a secondary aluminium recycling process by-product, as precursors of AABs. WBA and PV were mixed at weight ratios of 98/2, 95/5, and 90/10. A mixture of waterglass (WG) and NaOH at different concentrations (4 and 6 M) was used as the alkaline activator solution. The effects of increasing NaOH concentration and PV content were evaluated. Alkali-activated WBA/PV (AA-WBA/PV) binders were obtained. Selective chemical extractions and physicochemical characterization revealed the formation of C-S-H, C-A-S-H, and (N,C)-A-S-H gels. Increasing the NaOH concentration and PV content increased porosity and reduced compressive strength (25.63 to 12.07 MPa). The leaching potential of As and Sb from AA-WBA/PV exceeded the threshold for acceptance in landfills for non-hazardous waste.
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MALDONADO ALAMEDA, Alex, MAÑOSA BOVER, Jofre, GIRÓ PALOMA, Jessica, FORMOSA MITJANS, Joan, CHIMENOS RIBERA, Josep ma.. Alkali-activated binders using bottom ash from waste-to-energy plants and aluminium recycling waste. _Applied Sciences_. 2021. Vol. 11, núm. 9, pàgs. 1-15. [consulta: 7 de febrer de 2026]. ISSN: 2076-3417. [Disponible a: https://hdl.handle.net/2445/176746]