Table 4 Correlation degree between shear strength parameters and microstructural parameters of loess under various FTCs.

From: Macro–micro correlation analysis on the loess from Ili River Valley subjected to freeze–thaw cycles

Comparative series

Grey relational degree

Cohesive force

The internal friction angle

Average maximum particle size

0.607

0.666

Particle size fractal dimension

0.672

0.550

Particle abundance

0.724

0.668

Particle orientation fractal dimension

0.670

0.668

Average maximum pore size

0.615

0.571

Pore size fractal dimension

0.563

0.567

Porosity

0.668

0.563

Pore orientation fractal dimension

0.554

0.649

T2 spectral area

0.504

0.522