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2022-12-13

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cc-by-nc-nd (c) Maldonado Alameda, Alex et al., 2022
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/196311

Fluidised-bed incineration bottom ash as the sole precursor of alkali-activated binders: A comparison with bottom ash from grate incinerators

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https://doi.org/10.1016/j.conbuildmat.2022.130001

Abstract

The novel formulation of alkali-activated binders (AABs) using incineration bottom ash (IBA) from fluidised bed (FB) combustion technology as a sole precursor was assessed. In addition, IBA-FB was compared with IBA from moving grate (IBA-MG) combustion technology. The AABs formulated with IBA-FB (AAB-FB) and IBA-MG (AAB-MG) were also evaluated from a physicochemical, mechanical, and environmental perspective. The results revealed that specific surface area in IBA-FB hinders the retention of kneading water of fresh pastes, affecting the workability, consistency, porosity, and mechanical strength of AAB-FB. Moreover, the low calcium content of IBA-FB requires that the formulated AABs must be cured at higher curing temperatures to ensure the formation of (N,C) ASH gels, while the high calcium content of IBA-MG promotes the formation of CSH gels at room temperature. The compressive strength results demonstrated that AAB-MG (≈ 11 MPa) and AAB-FB (≈ 8 MPa) could be used for non-structural purposes.

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Incineració, Materials de construcció, Residus

Subject (English)

Incineration, Building materials, Waste products

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Articles publicats en revistes (Ciència dels Materials i Química Física)

Citation

MALDONADO ALAMEDA, Alex, et al. Fluidised-bed incineration bottom ash as the sole precursor of alkali-activated binders: A comparison with bottom ash from grate incinerators. Construction and Building Materials. 2022. Vol. 364, num. 1-12. ISSN 0950-0618. [consulted: 9 of August of 2026]. Available at: https://hdl.handle.net/2445/196311

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