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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/7989

    Título
    Self-compacting concrete with recycled concrete aggregate subjected to alternating-sign temperature variations: Thermal strain and damage
    Autor
    Revilla Cuesta, VíctorAutoridad UBU Orcid
    Skaf Revenga, MartaAutoridad UBU Orcid
    Santamaría, Amaia
    Espinosa González, Ana BelénAutoridad UBU Orcid
    Ortega López, VanesaAutoridad UBU Orcid
    Publicado en
    Case Studies in Construction Materials. 2022,V. 17, e01204
    Editorial
    Elsevier
    Fecha de publicación
    2022-12
    ISSN
    2214-5095
    DOI
    10.1016/j.cscm.2022.e01204
    Resumen
    Any variation in temperature alters the dimensions of a concrete structure and provokes thermal stress. Moreover, the propagation of micro-cracking decreases the strength of concrete that is exposed to sub-zero temperatures (freezing), to heat phenomena (heating), or to cyclical thermal variations, especially when prepared using Recycled Concrete Aggregate (RCA). A reference selfcompacting concrete (SCC) mix made with 100% coarse and fine natural aggregate and three SCC mixes containing 100% coarse and/or fine RCA in replacement of natural aggregate were tested in this study of the thermal performance of SCC and the related effects of RCA. The mixtures were subjected to five thermal tests designed with positive and negative, and both constant and cyclical, extreme-ambient temperature variations, reaching temperatures of − 15 ◦C and 70 ◦C. Stiffness, weight, compressive strength, thermal deformability, and internal damage of the SCC mixtures were monitored throughout suitable testing. Internal damage, hygroscopicity, and loss of strength increased at temperatures below 0 ◦C, especially in the mixtures containing 100% coarse RCA, although the SCC manufactured with simultaneous additions of fine and coarse RCA fractions showed the worst performance. Overall, RCA performed better under positive temperature variations. The test results lead to the recommendation of a linear thermal expansion coefficient of 1.2⋅10− 5 ◦C− 1 in calculations for SCC containing RCA under those extreme environmental conditions.
    Palabras clave
    Self-compacting concrete
    Recycled concrete aggregate
    Extreme-ambient cyclical temperature increases
    Linear thermal expansion coefficient
    Internal damage
    Hygroscopicity
    Materia
    Ingeniería civil
    Civil engineering
    Materiales de construcción
    Building materials
    URI
    http://hdl.handle.net/10259/7989
    Versión del editor
    https://doi.org/10.1016/j.cscm.2022.e01204
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    • Artículos SUCONS
    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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    Nombre:
    Revilla-cscm_2022.pdf
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    11.52Mb
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