Study of Relationship between Fines Content and Cohesion of Soil

The relationship between fines content and cohesion of soil was studied. Selected lateritic soil samples were subjected to laboratory analysis. The fines were separated from the coarse component of the soils after which the samples were remoulded in varying ratios (fines:coarse) from 10:100 to 100:0 in 10% increment. Then the samples were subjected to unconsolidated-undrained triaxial test to determine the shear strength parameters. Quantitative relationships between fines content and cohesion of the soil samples were developed. It was found that, the cohesion of the soil samples generally increased with increase in fines content; the polynomial relationships gave the best fitting between the fines content and cohesion of the soil samples.