ESTIMATION OF CLAY CONTENT USING THE FIRST AND SECOND NORM OF THE IDEALISED FALL CONE FLOW CURVE

This paper presents two models that predict the quantity of active clay content within the soil matrix. The first model utilizes the ratio of the second to the first norm (distance factor) of the idealized fall cone flow curve. In contrast, the second model is based on the correlation between liquid limit and clay content. These models were developed by analyzing 307 Atterberg limits and clay content test results, a comprehensive data collection from thirteen published literature. The models were validated using 55 test results from four additional published literature. The predicted clay content was within the statistical testing bound of ±12 given in AASHTO T88-10