Tekrarlı trafik yükleri altında farklı kil içeriklerine sahip orta-sıkı kum-kil karışımlarının esneklik modülünün incelenmesi

Abstract

Resilient modulus is commonly used in prediction of long-term deformation performances of pavement foundation layers under repeated traffic loads. For this reason, the determination of this material property accurately has a great importance in pavement designs. In this study, resilient modulus of medium-dense sand-clay mixtures was investigated through cyclic triaxial and heart-shaped stress paths. For this purpose, sand-clay specimens having a clay content as 0%, 5%, 10%, and 20% by weight were prepared at an initial relative density of 50% and tested using hollow cylinder testing apparatus. According to the test results, the resilient modulus values of sand-clay mixtures are overestimated by cyclic triaxial stress path, which results in the underestimation of deformation behavior of medium-dense sand-clay mixtures under traffic loads compared to heart-shaped stress path. Based on the findings of this study, it is concluded that a heart-shaped stress path should be taken into consideration for a more accurate prediction of resilient modulus of sand-clay mixtures for pavement designs.