عنوان مقاله [English]
Liquefaction is one of the natural catastrophic phenomena, which causes some destruction of engineering structures. Various contents of plastic fines in sand deposits cause different behavior during earthquake cyclic loading. There are several criteria to evaluate the liquefaction potential of clayey sands, based on plasticity, which yield fairly various results, according to their assumptions. In this study, by evaluation of these criteria, based on plasticity, the correctness of them was assessed in sands, including plastic fines with low plasticity (PI=15.5). To evaluate the liquefaction criteria based on plasticity, some strain-controlled cyclic triaxial tests were conducted on sand-kaolinite mixture specimens containing %0,%10, %20, and %30 kaolinite and the results were compared with these criteria. In addition, several static triaxial tests were performed on these mixtures to evaluate induced variations in the specimens' microstructure by increasing plastic fines.