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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/7980

    Título
    Statistical Approach for the Design of Structural Self-Compacting Concrete with Fine Recycled Concrete Aggregate
    Autor
    Revilla Cuesta, VíctorAutoridad UBU Orcid
    Skaf Revenga, MartaAutoridad UBU Orcid
    Espinosa González, Ana BelénAutoridad UBU Orcid
    Santamaría, Amaia
    Ortega López, VanesaAutoridad UBU Orcid
    Publicado en
    Mathematics. 2020, V. 8, n. 12, e2190
    Editorial
    MDPI
    Fecha de publicación
    2020-12
    DOI
    10.3390/math8122190
    Resumo
    The compressive strength of recycled concrete is acknowledged to be largely conditioned by the incorporation ratio of Recycled Concrete Aggregate (RCA), although that ratio needs to be carefully assessed to optimize the design of structural applications. In this study, Self-Compacting Concrete (SCC) mixes containing 100% coarse RCA and variable amounts, between 0% and 100%, of fine RCA were manufactured and their compressive strengths were tested in the laboratory for a statistical analysis of their strength variations, which exhibited robustness and normality according to the common statistical procedures. The results of the confidence intervals, the one-factor ANalysis Of VAriance (ANOVA), and the Kruskal–Wallis test showed that an increase in fine RCA content did not necessarily result in a significant decrease in strength, although the addition of fine RCA delayed the development of the final strength. The statistical models presented in this research can be used to define the optimum incorporation ratio that would produce the highest compressive strength. Furthermore, the multiple regression models offered accurate estimations of compressive strength, considering the interaction between the incorporation ratio of fine RCA and the curing age of concrete that the two-factor ANOVA revealed. Lastly, the probability distribution predictions, obtained through a log-likelihood analysis, fitted the results better than the predictions based on current standards, which clearly underestimated the compressive strength of SCC manufactured with fine RCA and require adjustment to take full advantage of these recycled materials. This analysis could be carried out on any type of waste and concrete, which would allow one to evaluate the same aspects as in this research and ensure that the use of recycled concrete maximizes both sustainability and strength.
    Palabras clave
    Self-compacting concrete (SCC)
    Recycled concrete aggregate (RCA)
    RCA content optimization
    Robustness
    Analysis of variance (ANOVA)
    Compressive strength prediction
    Characteristic compressive strength
    Distribution fitting
    Materia
    Ingeniería civil
    Civil engineering
    Materiales de construcción
    Building materials
    URI
    http://hdl.handle.net/10259/7980
    Versión del editor
    https://doi.org/10.3390/math8122190
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