*5.1. Calibration of the RFCP-P*

From the previous analysis, the angle of repose was only sensitive to the RFCP-P, so the RFCP-P was calibrated by simulation of the repose angle. The RFCP-P was taken as 0.01, 0.02, 0.03, 0.04, and 0.05, and the RFCP-B was taken as 0.02 for the single factor test of the repose angle. The RFCP-P was calibrated by comparing the simulation and test results.
