A grading parameter for evaluating the grading-dependence of the shear stiffness of granular aggregates--颗粒学报PARTICUOLOGY

Sun, Y., Shen, Y., & Chen, C. (2018). A grading parameter for evaluating the grading-dependence of the shear stiffness of granular aggregates. Particuology, 36, 193-198. https://doi.org/10.1016/j.partic.2017.05.006

A grading parameter for evaluating the grading-dependence of the shear stiffness of granular aggregates

Yifei Sun ^*, Yang Shen, Chen Chen

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China

10.1016/j.partic.2017.05.006

Volume 36, February 2018, Pages 193-198

Received 4 March 2017, Revised 8 April 2017, Accepted 1 May 2017, Available online 1 September 2017, Version of Record 22 December 2017.

E-mail: sunny@hhu.edu.cn; sunnyhhu@gmail.com

Highlights

• A parameter C_g derived from parallel-column model was grading-dependent in terms of shear stiffness.

• Coefficient of uniformity C_u and median particle size decreased with increasing C_g.

• C_g better correlated with material constants of Hardin’s stiffness formula than C_u for quartz sand.

Abstract

To capture the grading-dependence of the shear stiffness of heterogeneous granular aggregates, a new grading parameter that considered the size distribution of the entire aggregates was developed. Both the coefficient of uniformity and median particle size decreased with increasing the grading parameter. A general increase of the shear stiffness with increasing the grading parameter was observed. Comparison with experimental results revealed that the proposed grading parameter had a stronger correlation with the material constants of Hardin's stiffness formula than the coefficient of uniformity, which is a traditional grading parameter.

Graphical abstract

Keywords

Shear stiffness; Grading; Coefficient of uniformity; Particle size

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