ABSTRACT
As shown in Figure 1(a), S-wave and P-wave velocity were measured in this study using bender elements. The propagation direction was varied by arranging the installation direction of the bender element such that it was parallel for the p-wave and perpendicular for the s-wave. Wave velocities were measured continuously
for 28 days under 160 kPa vertical stress. From the wave propagation transition, arrival time was calculated. The wave velocities were calculated by dividing the height of the specimen by the measured arrival time (Dano, 2004; Khan, 2006).
