Effect of water content on resilient modulus and damping ratio of fine/coarse soil mixtures with varying coarse grain contents

For the French ancient rail track, owing to effect of traffic loadings, an interlayer was naturally created due interpenetration ballast grains and subgrade fine soil. Under rainfall/evaporation, water content soil can vary, affecting its dynamic properties such as resilient modulus damping ratio. In order investigate on ratio soil, a series cyclic triaxial tests were carried out, following multi-step loading procedure with various deviator stress amplitudes 10, 30, 50, 100 200 kPa. Two target fines contents (17.6% 10.6%) five coarse grain (0%, 10%, 20%, 35% 45%) considered. Results showed that under given content, increase led decrease suction while viscosity. Through variations characteristic identified, defining two distinct fabrics: dominated fabric when smaller than value, larger value. Moreover, constant obtained at content: 25.5% 17.6% 32.0% 10.6% content. The could be explained by swelling-shrinkage soil: shrinkage volume macro-pores. More thus needed constitute global skeleton, giving rise addition, comparison values from those monotonic slightly value loading, evidencing more significant fabric.