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

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  • Flora Faleschini

    (Department of Civil, Environmental and Architectural Engineering, University of Padova, 35131 Padova, Italy
    Department of Industrial 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)

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.

Suggested Citation

  • Flora Faleschini & Klajdi Toska & Mariano Angelo Zanini & Filippo Andreose & Alessio Giorgio Settimi & Katya Brunelli & Carlo Pellegrino, 2021. "Assessment of a Municipal Solid Waste Incinerator Bottom Ash as a Candidate Pozzolanic Material: Comparison of Test Methods," Sustainability, MDPI, vol. 13(16), pages 1-16, August.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:16:p:8998-:d:612728
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    References listed on IDEAS

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    1. Mohammed Fouad Alnahhal & Ubagaram Johnson Alengaram & Mohd Zamin Jumaat & Mamoun A. Alqedra & Kim Hung Mo & Mathialagan Sumesh, 2017. "Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete," Sustainability, MDPI, vol. 9(5), pages 1-23, May.
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    Cited by:

    1. Fausto Minelli & Enzo Martinelli & Luca Facconi, 2021. "Innovative Structural Applications of High Performance Concrete Materials in Sustainable Construction," Sustainability, MDPI, vol. 13(22), pages 1-2, November.

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