ABSTRACT
A transfer function describes a relation between the grading curves and a physical property of the soils. Its direct interpolation needs exponentially many data in terms of the number of the fractions in the grading curve N. A method—based on the grading entropy concept, a double interpolation technique and c N data as a maximum—is used to interpolate a transfer function between the parameters of the Fredlund-Xing soil water characteristic curve equation and the grading curve for well-graded sands in this paper. The method of the measurement and the measured data are also briefly presented.
