Influence of roundness on the void ratio and strength of uniform sand

Exploring the relationship between critical state and particle shape for granular materials

“…The trend given by the above correlation is generally consistent with results from several previous studies on natural and crushed sands that I cs decreases with particle roundness (e.g., Cho et al, 2006;Rouse et al, 2008). Roundness describes the angularity of a particle and can be quantified as the ratio of the average radius of curvature of surface features to the radius of curvature of the maximum inscribed sphere (Wadell, 1932).…”

“…The key particle characteristics for coarse grained soils include particle size, particle size distribution, particle shape and mineralogy. Research interest has been growing in the influence of particle characteristics on the behavior of granular soils, resulting in valuable data and insights that contribute to an improved understanding in several aspects (e.g., Sukumaran and Ashmawy, 2001;Cho et al, 2006;Rouse et al, 2008;Witchmann and Triantafillidis, 2009;Cavarretta et al, 2010;Yang and Wei, 2012; and the references therein).…”

“…The method is time consuming and not feasible for assessing large numbers of particles, and because of the subjective nature the level of accuracy may not be high. To improve accuracy, one can choose to calculate the roundness of a particle directly from the measurements on the particle image by using the Wadell (1932) method (e.g., Rouse et al, 2008) or by use of complex Fourier analysis (Bowman et al, 2001). Nevertheless, the direct measurement remains tedious and is viable only for a small number of particles.…”

Influence of Particle Size on the Friction and Interfacial Shear Strength of Sands of Similar Morphology

“…The stress-strain response and volume change behavior of sands in shear and interface shear are mainly influenced by the normal stress, method of testing and testing materials [1][2][3][4][5][6], morphological characteristics of sand [7][8][9][10][11][12] and surface roughness of the geosynthetic material at the interface [13][14][15][16][17][18]. Morphological characteristics of sand grains reflect the formation process, transportation process and material composition.…”

Análisis Comparativo de Métodos para la Medición del Ángulo de Reposo de Suelos Granulares

“…Los ángulos de reposo obtenidos con los diferentes mé-todos para las seis arenas conforman un panorama muy consistente: Primero, en todos los casos se tiene que los φ rep obtenidos con el método ASTM y el propuesto por Cornforth (1973) son similares; esto concuerda con lo obtenido por Rousé et al (2008) para el caso de Badger Sand. La mayor diferencia entre estos dos métodos es de 1.8° para la arena El Quisco y la menor diferencia de 0.4° corresponde a RLeiva 2° Tipo.…”