Resilient modulus of cohesive soils

Resilient modulus tests were performed on three clayey subgrade soils with repeated-loading triaxial test equipment. For the laboratory-compacted samples, stress at 1% axial strain from the conventional unconfined compression test (S-u1.0%,) was found to be a good indicator of the resilient modulus (M(R)). An empirical correlation between laboratory-compacted M(R) and S-u1.0% was developed and was found to be applicable for the different cohesive soils tested. Data suggest that the M(R) and S-u1.0% relationship applies to field-compacted specimens as well.