Correlation Between Small-Strain Shear Stiffness and Compressive Strength of Clayey Soils Stabilized with Cement and Nano-SiO2

The small-strain shear modulus ( G max ) is also a key parameter in the dynamic analysis of the soil behavior at the range of small strains. Unconfined compressive strength ( q u ) is one of the main parameters for selecting the type and amount of a particular stabilizer in the soil chemical stabilization. Correlating these two strength and stiffness parameters could be useful for the accurate assessment of the soil behavior. In this laboratory study, the influence of different contents of cement and Nano-SiO 2 and various curing periods on G max and q u of the stabilized soft clay soils is examined through the results of several bender element and uniaxial strength tests. The results show that increasing the cement and Nano-SiO 2 contents as well as the curing time of the samples leads to a considerable increase in their G max and q u . Accordingly, a practical correlation is observed to exist between G max and q u for the stabilized soft clay samples. Being independent of the amount of cement and Nano-SiO 2 contents and also the respective curing period, this correlation could be of great help for the geotechnical engineers so as to efficiently predict the small strain shear modulus of the mixture by performing quick, inexpensive uniaxial compression tests.