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A New Method on Characterizing Particle Crushing State and Strength Revolution of Geotechnical Materials Based on Linear Fitting

Xi Li 1, Sheng Zhang 1, Chenxi Tong 2, and Jing Li 1
1. School of Civil Engineering, Central South University, Changsha, China
2. Dept of Civil, Surveying & Environmental Engineering, University of Newcastle, NSW, Australia
Abstract—It’s intrinsic properties for geotechnical material to crush after loading or other mechanical impact. Therefore, one of the primary questions need to be solved is to define the degree to which the particles of an element of soil are crushed or broken during loading. Considering the fact that with continued particle crushing the proportion of smaller diameter particles will increase and there is a tendency for the grading to become increasingly “self-similar” or “fractal”. Thus, based on the lope and correlation coefficient of fitting line, the article proposes a concise method to describe the revolution characters of particle crushing state. Combining with two sets direct shear tests of specific grading, the relationship between the parameters of particle crushing state and strength index φ is discussed. It’s confirmed that the parameters of particle crushing state have clear physical meaning and wide applicability.

Index Terms—particle crushing; particle size distribution (PSD); strength; fitting line

Cite: Xi Li, Sheng Zhang, Chenxi Tong, and  Jing Li, "A New Method on Characterizing Particle Crushing State and Strength Revolution of Geotechnical Materials Based on Linear Fitting," International Journal of Structural and Civil Engineering Research, Vol. 7, No. 1, pp. 51-59, February 2018. doi: 10.18178/ijscer.7.1.51-59
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