Cyclic simple shear tests were conducted on undisturbed and reconstituted specimens of high-plasticity Augusta clay. Test results were examined in terms of stiffness characteristics either in the small and medium strain range. It has been found that the small-strain shear modulus of natural soil is always higher than that of the reconstituted material. A normalization procedure was proved useful in interpreting the small-strain test results. At larger strain levels, the normalized shear modulus of natural soil showed a steeper decrease with shear strain amplitude with respect to that detected on the reconstituted material, thus evidencing a more marked non-linear behavior. The influence of soil structure was invoked to explain the observed differences.
Stiffness of natural and reconstituted augusta clay at small to medium strains
PAGLIAROLI, Alessandro
2007-01-01
Abstract
Cyclic simple shear tests were conducted on undisturbed and reconstituted specimens of high-plasticity Augusta clay. Test results were examined in terms of stiffness characteristics either in the small and medium strain range. It has been found that the small-strain shear modulus of natural soil is always higher than that of the reconstituted material. A normalization procedure was proved useful in interpreting the small-strain test results. At larger strain levels, the normalized shear modulus of natural soil showed a steeper decrease with shear strain amplitude with respect to that detected on the reconstituted material, thus evidencing a more marked non-linear behavior. The influence of soil structure was invoked to explain the observed differences.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
