Effect of fulvic acid contamination on the shear strength and microstructural evolution of red clay (opens in new tab)

The influence of fulvic acid (FA) contamination on the residual shear strength of red clay is an important issue in geological engineering. This study examines the effects of FA contamination on the shear strength, mineral composition, and microstructural changes in Guilin red clay using drained repeated direct shear test, along with X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle and pore structure analysis system (PCAS). The results indicate that a low FA concentra...