Hyperbolic Stress-Strain Parameters for Structured/Cemented Silts

This report describes the research completed under the project titled Soil-Structure Interaction Parameters for Structured Silts. The main objective of this research was to characterize the drained stress-strain behavior of naturally occurring structuredcemented silts. The results of this research were used to develop recommendations for hyperbolic stress-strain and Mohr-Coulomb shear strength parameters for use in soil-structure interaction analyses involving structuredcemented silts. This research utilized extensive oedometer and isotropically consolidated-drained triaxial compression tests on structuredcemented and reconstituted specimens to evaluate the importance of the structurecementation on the stress-strain behavior and anisotropy of silts. Triaxial compression tests were also conducted on structuredcemented and reconstituted specimens at the natural degree of saturation and after laboratory saturation to investigate the effect of inundation on the drained stress-strain behavior of silts. In addition, unloadreload triaxial compression tests were conducted to estimate the unloadreload modulus and the effect of unloadingreloading on the degradation of the structurecementation of silt. This report summarizes the test procedures, test results, and the resulting hyperbolic stress-strain and Mohr-Coulomb shear strength parameters for structuredcemented and reconstituted silt.