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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/7990

    Título
    Mechanical properties, nanoscale characteristics, and environmental analysis of high-volume waste coral powder mortar (HVCM)
    Autor
    He, Zhi-hai
    Ni, Ya-qian
    Zhang, Yu
    Shi, Jin-yan
    Revilla Cuesta, VíctorAutoridad UBU Orcid
    Hu, Yun-jin
    Lu, Jun
    Publicado en
    Powder Technology. 2022, V. 407, 117613
    Editorial
    Elsevier
    Fecha de publicación
    2022-07
    ISSN
    0032-5910
    DOI
    10.1016/j.powtec.2022.117613
    Résumé
    With the development of marine resources, coral-based cement compositions have broad application prospects in coastal infrastructure construction such as island reef construction, flood control embankment, airport, and road, etc. Waste coral powder (CP) was used to prepare high-volume CP mortar (HVCM), and its multiscale characteristics and environmental benefits were assessed, such as strength, microstructure, and nanoscale characteristics. The results showed that with the increase of CP substitution level, the mechanical properties of HVCM decreased, and the autogenous shrinkage of the mixture was significantly improved. The use of CP to replace the high-volume cement degraded the microstructure of the samples. From the perspective of nanoscale characteristics, the incorporation of CP reduced the content of hydration phase in the matrix and increased the pore phase. Meanwhile, the widening of the interfacial transition zone of the HVCM samples was also the main reason for their performance degradation. Although the incorporation of CP decreased the average elastic modulus of CS-H and increased its total porosity, the pore structure of the gel was slightly refined. In addition, HVCM had lower carbon emissions and consumption of non-renewable energy compared to plain mortar.
    Palabras clave
    Mortar
    Waste coral power
    Environmental analysis
    Multiscale characteristics
    Nanomechanical properties
    Materia
    Ingeniería civil
    Civil engineering
    Materiales de construcción
    Building materials
    URI
    http://hdl.handle.net/10259/7990
    Versión del editor
    https://doi.org/10.1016/j.powtec.2022.117613
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