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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/6175

    Título
    Multi-criteria feasibility of real use of self-compacting concrete with sustainable aggregate, binder and powder
    Autor
    Revilla Cuesta, VíctorAutoridad UBU Orcid
    Skaf Revenga, MartaAutoridad UBU Orcid
    Espinosa González, Ana BelénAutoridad UBU Orcid
    Ortega López, VanesaAutoridad UBU Orcid
    Publicado en
    Journal of Cleaner Production. 2021, V. 325, 129327
    Editorial
    Elsevier
    Fecha de publicación
    2021-11
    ISSN
    0959-6526
    DOI
    10.1016/j.jclepro.2021.129327
    Resumen
    Replacing natural raw materials with industrial by-products can increase the sustainability of Self-Compacting Concrete (SCC), although its fresh and hardened behavior will usually worsen. The benefits of increased sustainability must therefore outweigh any reduction in concrete flowability and strength. These aspects can be analyzed through Multi-Criteria Decision-Making (MCDM) algorithms. In all, 19 SCC mixes were studied. One reproduced commercial SCC (limestone filler and conventional cement), the others were produced with more sustainable materials: 100% coarse Recycled Concrete Aggregate (RCA); 0%, 50% or 100% fine RCA; 45% Ground Granulated Blast-furnace Slag (GGBS); and sustainable aggregate powders such as limestone fines 0/0.5 mm and RCA powder 0/0.5 mm. Decreased flowability at 15 and at 60 min, compressive strength, modulus of elasticity, carbon footprint, and cost of mix were all studied. Both the carbon footprint and the cost were calculated considering only the composition of the SCC, without including aspects that depend on each particular case study, such as transport distances. These aspects constituted the decision-making criteria of the MCDM analysis, under which 14 scenarios were evaluated with different requirements for SCC, using 3 different algorithms (TOPSIS, AHP, and PROMETHEE). The results suggested that the ideal choice for fast concreting is a combination of GGBS, 100% coarse RCA and limestone fines, although if SCC has to be transported to the concreting point, then conventional cement should be used. Strength and stiffness can be maximized by limiting the fine RCA content to 50%. Finally, considering a versatile choice, only SCC with coarse RCA, limestone fines, GGBS and 0% fine RCA could compete with conventional SCC. Adapting the design to minimize the detrimental effects of by-products is therefore essential to promote sustainable SCC that is also commercially competitive.
    Palabras clave
    Ground granulated blast-furnace slag
    Recycled concrete aggregate
    Sustainable aggregate powder
    Self-compacting concrete
    Multi-criteria decision-making
    Optimal concrete composition election
    Materia
    Materiales de construcción
    Building materials
    URI
    http://hdl.handle.net/10259/6175
    Versión del editor
    https://doi.org/10.1016/j.jclepro.2021.129327
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    Attribution-NonCommercial-NoDerivatives 4.0 Internacional
    Documento(s) sujeto(s) a una licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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    Revilla-jcp1_2021.pdf
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    15.09Mb
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