COMPUTATION OF PLASTICITY INDEX OF INORGANIC CLAY USING FIRST AND SECOND NORM OF THE IDEALISED FALL CONE FLOW CURVE

A model of computing the plasticity index of inorganic soil using the ratio of the second norm (Euclidian norm) to the first norm (Manhattan distance) of the idealized fall cone flow curve is proposed. The model was developed using 204 controlled Atterberg limit test results of inorganic soils and validated using 74 Atterberg limit test results collected from the literature. The model computes the plasticity index of the inorganic soils within the statistical testing bound of ±8.