粘土の液性限界の測定法に関する研究

概要

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The liquid limit is one of the basic indexes of physical properties of clays. A method proposed by Casagrande has been widely used to measure the liquid limit, however, some technical problems are pointed out for this conventional method. Recently more mechanical method using fall cone has often used to measure the liquid limit. In this paper, a number of liquid limit tests by both of Casagrande's method and fall cone method were performed to clarify the relationship between the both method. It is shown that the relationship between water content and the liquid limit under any constant cone penetration are expressed by regression lines intersecting at a point. Based on this findings, a new normalizing parameter called normalized water content is introduced to correlate the cone penetrating characteristics of various clays. The relations between the liquid limit by Casagrande's method and by cone method are derived for various type of cone. It is also shown that the cone penetration corresponding to the liquid limit by Casagrande's method varies with the liquid limit.
福山大学の論文