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Title: | Fluidised-bed incineration bottom ash as the sole precursor of alkali-activated binders: A comparison with bottom ash from grate incinerators |
Author: | Maldonado Alameda, Alex Mañosa Bover, Jofre Miro-Escola, J. Quintero-Payan, Alex C. Chimenos Ribera, Josep Ma. |
Keywords: | Incineració Materials de construcció Residus Incineration Building materials Waste products |
Issue Date: | 13-Dec-2022 |
Publisher: | Elsevier |
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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.conbuildmat.2022.130001 |
It is part of: | Construction and Building Materials, 2022, vol. 364, p. 1-12 |
URI: | http://hdl.handle.net/2445/196311 |
Related resource: | https://doi.org/10.1016/j.conbuildmat.2022.130001 |
ISSN: | 0950-0618 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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