Cyclic behavior of Adapazarı silt and clay mixtures

Within the confines of this paper, it is intended to understand cyclic behavior of clayey silt and silty clay mixtures, sampled from Adapazarı–Turkey. For this purpose, series of cyclic triaxial tests were performed on the samples retrieved from five selected soil sites, where buildings founded on these soils exhibited significant foundation displacements. After consolidating samples to 0.50 atm. cyclic loads were applied to simulate 1999 Kocaeli-Turkey earthquake shaking. Volumetric strains were recorded both during consolidation and after the end of cyclic loading. Following conclusions were drawn as a result of cyclic triaxial testing of Adapazarı soils: i) mixtures of low plasticity silts and clays can be cyclically liquefied based on either 100% pore pressure generation or 5% double amplitude axial strain criteria, ii) pore pressure build-up in silty clays and clayey silts is generally slower than that observed in sands and non-plastic silts, iii) rate of pore pressure build-up in silty clays and clayey silts is faster relative to sands at early portions of the number of cycles to liquefaction iv) low to medium plasticity silty clays can build up significant pore pressures (r u >70%) under reasonably low number of cyclic loads (N<25) at moderate to high CSR's (~0.3 to 0.5).
Citation Formats
O. Pekcan, K. Ö. Çetin, and B. S. Bakır, “Cyclic behavior of Adapazarı silt and clay mixtures,” presented at the Proceedings of the 11th International Conference on Soil Dynamics and Earthquake Engineering (The 3rd International Conference on Earthquake Geotechnical Engineering), 2004, 2004, Accessed: 00, 2021. [Online]. Available: