ABSTRACT
Various mathematical models appear in the literature for expressing the relationship between resilient modulus and stress state. In this paper, four mathematical models that are oftentimes cited in the literature are examined and evaluated for their ability to relate resilient modulus and stress. To generate resilient modulus data for making the evaluation and correlation analysis, 60 resilient tests were performed on remolded clayey soils. AASHTO Classifications of the soils used in the resilient modulus testing program were A-4, A-6, A-7-5, and A-7-6. All specimens were compacted to 95 percent of maximum dry density and optimum moisture content obtained from AASHTO T-99-97. The resilient modulus tests were performed following the protocol of AASHTO-292-91. Simple and multiple correlation regression analysis were performed on the data generated from the testing program. Shortcomings of the models frequently cited in the literature are examined and discussed. To overcome the shortcomings and inherit problems of those models, a new model is proposed by the authors. This model considers the effects of both confining stress and deviator stress on resilient modulus.
