Estimation of Unconfined Compressive Strength of Cohesive Soils in and Around Mysore, South India

Unconfined compressive strength (UCS) of soils is considered as a significant soil parameter. The soil strength provides the benchmark for usage in any subsurface civil infrastructural constructions. The purpose of this research was to investigate the effect of soil type on the rheological parameters of a re-engineered cohesive soil. According to the ASTM standard, the shear strength of the unconsolidated soil under unconfined circumstances is measured using the unconfined compressive strength (UCS) technique. Soil samples of Outer Ring Road, Mysore city, were subjected to tests. The studies illustrate that, for clayey sand (SC), silty, clayey sand with gravel (SC–SM), silty sand (SM), and well-graded sand with silt soil (SW–SM), normal stress ranges from 1.693 to 6.428 kg/cm², whereas shear stress ranges from is 0.847 to 2.384 kg/cm² and internal angle of friction (α) ranges from 57° to 64°. The stress–strain diagram and Mohr circle exhibit average values of normal stress, shear stress and internal angle of friction for four major types of soil of the study area. The outcome of the experimental program led to govern the shear strength of the soil is also conferred.