Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/176746
Title: | Alkali-activated binders using bottom ash from waste-to-energy plants and aluminium recycling waste |
Author: | Maldonado Alameda, Alex Mañosa Bover, Jofre Giró Paloma, Jessica Formosa Mitjans, Joan Chimenos Ribera, Josep Ma. |
Keywords: | Recuperació de residus Materials de construcció Alumini Recovery of waste products Building materials Aluminum |
Issue Date: | 23-Apr-2021 |
Publisher: | MDPI |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.3390/app11093840 |
It is part of: | Applied Sciences, 2021, vol. 11, num. 9, p. 1-15 |
URI: | http://hdl.handle.net/2445/176746 |
Related resource: | https://doi.org/10.3390/app11093840 |
ISSN: | 2076-3417 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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711900.pdf | 9.11 MB | Adobe PDF | View/Open |
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