Akademik Veri Yönetim Sistemi
16th International Conference on Geotechnical Engineering, Lahore, Pakistan, 7 - 08 Aralık 2022, ss.148-157, (Tam Metin Bildiri)
The critical state framework is a prominent assessment technique to evaluate the flow/non-flow behaviour of granular soils in drained or undrained conditions. Fines content greatly influences the soil fabric and the mechanical behaviour of granular soils, as a result of which the critical state framework assessment is affected. Limitations also exist in the development of a critical state when the soil is subjected to low-stress levels. In this research, the effect of these two factors is considered on the compressibility and critical state of carbonate sand. A series of consolidated drained direct shear box and consolidated undrained triaxial compression tests were conducted to analyse the critical state framework at stress levels of 50, 100 and 150 kPa for relative density of 35% and 70%. The soil samples consisted of Famagusta Bay sand incorporated with 10, 20 and 30 percentages of silts and clays reconstituted with the use of the dry funnel pluviation technique. The analyses have focused on how the addition of plastic fines affected the compressibility and critical state of the sand matrix under shearing. Results indicated that the addition of plastic fines caused diverse critical states and compressibility lines as compared to natural sand. The plastic fines influenced the assessments based on the critical state framework significantly, modifying the prevailing behaviour as flow or non-flow.