TY - JOUR
T1 - Mathematical model revealing the evolution of particle breakage and particle-size distribution for rockfill during triaxial shearing
AU - Guo, Wanli
AU - Huang, Yinghao
AU - Fourie, Andy
AU - Wu, Yingli
PY - 2021
Y1 - 2021
N2 - A mathematical model reflecting the evolution of both particle breakage and particle-size distribution (PSD) for rockfill subjected to triaxial shear has been proposed in this article. First, the PSD of a soil is expressed by a gradation equation which has been shown to be widely applicable by comparison with a large amount of test data from soils encountered in practice. Then two particle breakage factors B g and B r are suggested and proved to be two suitable breakage factors in the model. Mathematical relationships between B g , B r and the gradation equation’s parameters b and m are derived. Then, correlations between the two breakage factors, effective mean normal stress and generalised shear strain during shearing are expressed by empirical functions, with several drained triaxial compression test data verifying the applicability. The inter-relationships of particle breakage, PSD and stress state of rockfill are thereby established, providing what is termed the PSD evolution model. Additionally, the proposed PSD evolution model is verified by successfully predicting the particle breakage factors and PSDs of rockfill triaxial specimens.
AB - A mathematical model reflecting the evolution of both particle breakage and particle-size distribution (PSD) for rockfill subjected to triaxial shear has been proposed in this article. First, the PSD of a soil is expressed by a gradation equation which has been shown to be widely applicable by comparison with a large amount of test data from soils encountered in practice. Then two particle breakage factors B g and B r are suggested and proved to be two suitable breakage factors in the model. Mathematical relationships between B g , B r and the gradation equation’s parameters b and m are derived. Then, correlations between the two breakage factors, effective mean normal stress and generalised shear strain during shearing are expressed by empirical functions, with several drained triaxial compression test data verifying the applicability. The inter-relationships of particle breakage, PSD and stress state of rockfill are thereby established, providing what is termed the PSD evolution model. Additionally, the proposed PSD evolution model is verified by successfully predicting the particle breakage factors and PSDs of rockfill triaxial specimens.
KW - evolution model
KW - gradation equation
KW - particle breakage
KW - particle-size distribution
KW - Rockfill
UR - http://www.scopus.com/inward/record.url?scp=85061006210&partnerID=8YFLogxK
U2 - 10.1080/19648189.2018.1552898
DO - 10.1080/19648189.2018.1552898
M3 - Article
AN - SCOPUS:85061006210
SN - 1964-8189
VL - 25
SP - 893
EP - 908
JO - European Journal of Environmental and Civil Engineering
JF - European Journal of Environmental and Civil Engineering
IS - 5
ER -