Consolidated undrained behavior of gravelly materials

This paper studies the behavior of a number of gravelly modeled materials by conducting large-scale triaxial testing. undrained monotonic compression tests were carried out on the high compactedgravelly soil specimens with different fine content and stress levels. it was observed that high compactedgravelly soil specimens show dilative behavior at failure in a wide range of fine content. the effectivestress paths of the materials having less than 10% and more than 22% of material finer than 0.2 mm arecompletely different. variations of the cu material parameters with respect to the confining pressure, finecontent, shape, strength and particle size were investigated. the cu material results were compared withthose in cd conditions. the value of internal effective friction angle in cd conditions is slightly higher thanthose of the cu conditions. moreover, where the volume strain in cd conditions is minimum, the excesspore water pressure in cu conditions decreases to zero.