Assessment of a Municipal Solid Waste Incinerator Bottom Ash as a Candidate Pozzolanic Material: Comparison of Test Methods

Flora Faleschini, Klajdi Toska, Mariano Angelo Zanini, Filippo Andreose, Alessio Giorgio Settimi, Katya Brunelli and Carlo Pellegrino
Additional contact information
Flora Faleschini: Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy
Klajdi Toska: Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy
Mariano Angelo Zanini: Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy
Filippo Andreose: Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy
Alessio Giorgio Settimi: Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
Katya Brunelli: Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
Carlo Pellegrino: Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy

Sustainability, 2021, vol. 13, issue 16, 1-16

Abstract: New generations of green concretes are often consuming large amounts of industrial waste, as recycled or manufactured aggregates and alternative binders substituting ordinary Portland cement. Among the recycled materials that may be used in civil engineering works, construction and demolition waste (C&DW), fly ashes, slags and municipal solid waste incinerator bottom ashes (MSWI BA) are those most diffused, but at the same, they suffer due to a large variability of their properties. However, the market increasingly asks for new materials capable of adding some specific features to construction materials, and one of the most interesting is the pozzolanic activity. Hence, this work deals with an experimental study aimed at assessing the technical feasibility of using an industrial waste comprised largely of MSWI BA, with small quantities of C&DW and electric arc furnace slag (EAFS), in green cement-based mixtures (cement paste and mortars). The aim of the work is to achieve the goal of upcycling such waste and avoiding its disposal and landfilling. Particularly, the test methods for assessing the pozzolanic activity of this waste are discussed, analyzing the efficacy of indirect methods such as the strength activity index (SAI), the conductivity test and the efficiency factor (k), together with a direct method based on lime consumption.

Keywords: mortars; MSWI bottom ash; pozzolanic activity; supplementary cementing materials; sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/16/8998/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/16/8998/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:16:p:8998-:d:612728

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().