A study on the effects of the fractal characteristics of aggregates on the mechanical behavior of cemented sand and gravel

L.  Guo; S.  Li; L.  Zhong; L.  Guo; L.  Wang; F.  Zhang; Y.  Zhang; M.  Wang

doi:10.3989/mc.2021.13020

Autores/as

L. Guo School of Water Conservancy, North China University of Water Resources and Electric Power - Henan Water Valley Research Institute - Henan Key Laboratory of Water Environment Simulation and Treatment https://orcid.org/0000-0001-8169-1525
S. Li School of Water Conservancy, North China University of Water Resources and Electric Power https://orcid.org/0000-0002-9784-3439
L. Zhong School of Water Conservancy, North China University of Water Resources and Electric Power - Henan Water Valley Research Institute - Henan Key Laboratory of Water Environment Simulation and Treatment https://orcid.org/0000-0001-6604-2068
L. Guo School of Water Conservancy, North China University of Water Resources and Electric Power - Henan Water Valley Research Institute - Henan Key Laboratory of Water Environment Simulation and Treatment https://orcid.org/0000-0002-9439-6805
L. Wang School of Water Conservancy, North China University of Water Resources and Electric Power - Henan Water Valley Research Institute - Henan Key Laboratory of Water Environment Simulation and Treatment https://orcid.org/0000-0002-1407-3724
F. Zhang School of Water Conservancy, North China University of Water Resources and Electric Power https://orcid.org/0000-0001-5447-5077
Y. Zhang School of Water Conservancy, North China University of Water Resources and Electric Power https://orcid.org/0000-0003-1405-2402
M. Wang School of Water Conservancy, North China University of Water Resources and Electric Power https://orcid.org/0000-0002-6072-177X

DOI:

https://doi.org/10.3989/mc.2021.13020

Palabras clave:

Áridos, Hormigón, Proporciones de mezcla, Módulo de elasticidad, Propiedades mecánicas

Resumen

La presencia de áridos no cribados en arena y grava cementadas (CSG) hacen que sus propiedades difieran de las del hormigón convencional. Se introduce la teoría fractal para estudiar los efectos de las características de los áridos en las propiedades de CSG, cuantificando la gradación y la forma de los áridos. La simulación numérica y el análisis muestran que: (1) la gradación mejorada de los áridos disminuye la dimensión fractal de la gradación y aumenta la tensión máxima y el módulo elástico de CSG; (2) áridos de formas más irregulares aumentan la dimensión fractal de la forma y disminuyen la tensión máxima y el módulo elástico de CSG; (3) la relación cuantificada entre las características de los áridos y las propiedades mecánicas de CSG proporcionan una base teórica para la asignación de los áridos en el diseño de ingeniería y en la construcción. La mezcla de los áridos artificiales puede mejorar la gradación de los áridos, pero reduce el rendimiento de CSG. Combinaciones adecuadas de áridos artificiales y naturales logran un rendimiento óptimo de CSG; en este estudio, esto se logra añadiendo un 20% de áridos artificiales con gradación estándar.

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