Changes in Electrokinetic Coupling Coefficients of Granite under Triaxial Deformation

Figure 10

The streaming potential (SP) and the pore pressure difference (Pdiff). Long-term trend of these values are used in the “DC” measurements of electrokinetic phenomena (a). Amplitude and phase of the sinusoidal variation caused by imposed pore pressure oscillation are used for the “AC” measurements of electrokinetic phenomena (b). The DC coupling coefficients and the dilatancy as a function of the pressure difference for G01 (c) and G02 (d). Blue and red lines indicate coupling coefficients and dilatancy, respectively.