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Título

MECHANICAL CHARACTERIZATION OF THE BEHAVIOR OF ARTIFICIAL GRAINS WITH SPECIFIC SIZE AND SHAPE

Resumo

Granular materials are used in the construction of dams, dikes, landfills, and several other geotechnical works. These structures are suscetible to failure and modeling their behavior ensures good performance in their use, as well as enhanced. Granular soils have varied grain sizes and shape of due to the different formation agents in these soils. Previously published studies indi-cate that the mechanical behavior of natural granular soils varies with the microstructure of these soils affected mainly by their grain size, shape and roughness. Thus, this paper aims to evaluate the mechanical behavior of abrasive artificial particulate materials in spherical, pyramidal and prismatic shapes of various sizes (between 1 mm and 10 mm), and to identify the main physical parameters of the grains that influence the mechanical behavior of these materials. Physical characterization tests of the artificial materials (grain size, maximum and minimum void ratios, and intergranular rough-ness) and shear strength tests (drained consolidated triaxial test) will be per-formed to compare the results. Initial experimental results from triaxial compression tests show that the shape of the abrasive grain influences the shear strength of the soil due to the better interlocking and rearrangement of the artificial angular grains, and that grain size interferes more with the me-chanical behavior of angular grains than spherical grains when varying the consolidation of the triaxial test.

Palavras-chave

Granular materials; Triaxial test; Artificial particulate materials; Shear strength; Grain size

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